REPORT 1967 - IUTAMiutam.org/wp-content/uploads/2016/04/IUTAM_1967.pdf · Prof. M. J. Lighthill acting as Secretary to report to the Bureau on the desirability of adopting these suggestions

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INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHANICS

REPORT 1967

IUTAM Hebelstrasse 40

78 Freiburg im Breisgau Germany

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REPORT 1967

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CONTENTS

I. - Report of the Secretary Page A. Summary Record of the Meeting of the Bureau in Copen-

hagen on September 6, 1967 . . . . . . . . . . . 5 B. Decisions taken by the General Assembly during 1967 14 C. Symposia held in 1967 . . . . . . . . . . . 14 D. Symposia decided for 1968 and later . . . . . 15 E. Representation of IUTAM in other organizations 17 F. Publications of IUTAM in 1967 . . . . . . 18 G. Changes of Members of the General Assembly . 19 H. Next Meeting of the Bureau . . . . . . . . 19 I. Next General Assembly . . . . . . . . . . 19 J. Xllth International Congress of Applied Mechanics and

Meeting of the Congress Committee . . . . . . . . . . 19

II. - Report of the Treasurer . . . . . . . . . . . . . . . 20

III. - Appendices A. Statuts de l'Union lnternationale de Mecanique Theorique

et Appliquee . . . . . . . . . . . . . . . . 23 B. Resolution de 1' Assemblee Generale de Pallanza . . 27 C. Regles de fonctionnement du Comite des Congres de

IUTAM . . . . . . . . . . . . . . . 28 D. Statutes of the International Union of Theoretical and

Applied Mechanics . . . . . . . . . . . . . . . . . 28 E. Resolution of the General Assembly at Pallanza . . . . . 33 F. Rules of procedure for the Congress Committee of IUTAM 33 G. Adhering Organizations and Members of the General

Assembly . .............. . H. Members of the Congress Committee of IUTAM I. Bureau of the Union . . . . . . . . . . . .

34 40 41

Page

J. IUTAM Symposium on the Generalized Cosserat Con-tinuum and the Continuum Theory of Dislocations with Applications (Stuttgart and Freudenstadt August 28 -September 2, 1967) . . . . . . . . . . . . . . . . · 41

K. The Second IUTAM Symposium on the Theory of Thin Shells (Copenhagen, September S-9, 1967) . . . . . · 45

L. IUTAM Symposium on the Behaviour of Dense Media under High Dynamic Pressures (Paris, September 11-15, 1967) . . . . . . . . 48

M. Publications of the Union N . Payment of Annual Dues 0 . Bank Accounts of IUTAM. P. Donations in 1967 . . . .

53 60 60 61

I. - REPORT OF THE SECRETARY

A. Summary Record of the Meeting of the Bureau

in Copenhagen on September 6, 1967

The meeting was held in the Conference Room of the Technical University of Denmark in Copenhagen at 0ster Voldgade 10. It was opened at 8.30 p.m. and closed at about 12 p.m.

Present: M. Roy (President), G. Temple (Vice-President), W. T. Koiter (Treasurer), H . Gorder (Secretary), and N.J. Hoff, W. Olszak, L. I. Sedov (Members), and G. K. Mikhailov (as guest).

Absent: H. Parkus.

Agenda

The following agenda for the meeting was approved: 1. Report on the Symposia decided for 1967 and later. 2. Discussion of Symposia envisaged for 1969 and later. 3. Discussion of further Symposia suggested for the future. 4. Report of the President on relations with ICSU. 5. Report of the Treasurer on the financial situation. 6. Report of the Secretary of the Congress Committee and of Professor

N.J. Hoff on the organization of the Xllth Congress in Stanford, 1968.

7. Coordination of international activities in the field of experimental mechanics.

8. Constitution of the Bureau for the period 1968-1972. 9. Date of the next Meeting of the Bureau.

10. Varia.

6 INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHANICS

Decisions of the Bureau

Item 1- Report on the Symposia decided for 1967 and later

The Bureau Meeting took place during the period of three weeks in which the three IUTAM Symposia decided for 1967 were being held :

1.1 I UT AM Symposium on the Generalized Cosserat Continuum and the Continuum Theory of Dislocations with Applications, Freuden-stadt, August 28-31, and Stuttgart, September 1-2, 1967. (Chair-man: Prof. E. Kroner)

1.2 Second I UT AM Symposium on the Theory of Thin Shells, Copen-hagen, September 5-9, 1967. (Chairman: Prof. F. Niordson)

1.3 I UT AM Symposium on the Behaviour of Dense Media under High Dynamic Pressures, Paris, September 11-15, 1967. (Chairman: Prof. M. Roy, Secretary: Dr. J. Berger)

The IUTAM allocations will be up to$ 5.000 each for the first and second symposium, whereas no financial support from IUTAM will be necessary for the third of these symposia. Springer-Verlag has offered to publish the proceedings of all three sym-posia under the usual favourable conditions without financial support by IUTAM.

Two symposia have already been decided for the year 1968, the year of the XIIth International Congress (to be held in Stanford, California, August 26-31, 1968):

1.4 I UTA M Symposium on Thermoinelasticity, East Kilbride, Glasgow, June 26-28, 1968.

The members of the Scientific Committee are Prof. B. A. Boley, Chairman (USA) Prof. F. Buckens (Belgium) Prof. F. K. G. Odqvist (Sweden) Prof. W. Olszak (Poland) Prof. H. Parkus (Austria) Dr. D. G. Sopwith (UK)

and Prof. V. V. Novozhilov (USSR) was invited to also act as member of the Committee but has not yet accepted. The preparation of this Sym-posium is well on the way. The Bureau decided that the IUTAM alloca-tion for the Symposium will be$ 5.000.

REPORT 1967 7

1.5 I UT AM Symposium on High-Speed Computing in Fluid Dynamics, Monterey, California, August 18-24, 1968 (in the week immediately before the XIIth International Congress in Stanford, California).

The list of members of the Scientific Committee has been completed since the last Bureau Meeting in Vienna, the members now being

Dr. F. N. Frenkiel, Chairman (USA) Prof. E. Becker (Germany) Prof. G. G. Chernyi (USSR) Prof. J.P. Guiraud (France) Prof. M. J. Lighthill (UK) Prof. I. Tani (Japan).

The questions of specific areas of fluid dynamics to be covered and of participants to be invited have been widely discussed. There is agreement that papers presented should be devoted to fundamental problems in fluid dynamics to which high-speed computing methods make an important contribution without overemphasizing numerical analysis or compu-tational techniques, and excluding aeronautical or meteorological appli-cations. The allocation from IUTAM funds for this symposium will be $ 4.000.

For the year 1969 the General Assembly in Vienna had decided the organization of two symposia and discussed further suggestions. It had also been decided by the General Assembly to encourage the organization of a further joint IAU/IUTAM Symposium on Cosmical Gas Dynamics for 1969 or later. The Bureau now discussed in detail the organization of the Symposia decided for 1969.

1.6 I UT AM Symposium on the Flow of Fluid-Solid Mixtures, Cam-bridge (UK), March 24-29, 1969.

The General Assembly in Vienna had appointed Prof. G. K. Batchelor as Chairman, and Dr. J. R. A. Pearson as Secretary of the future Scientific Committee and Prof. Batchelor was requested to submit to the Bureau in advance of the present Copenhagen Meeting suggestions for the further members of the Scientific Committee.

Following the suggestions submitted by Prof. Batchelor to the Bureau on August 4, 1967, the Bureau appointed

Prof. A. Craya (France), and Prof. V. A. Vanoni (USA)


as members of the Scientific Committee. As requested by the Bureau, Prof. Sedov will discuss within the USSR National Committee the name of the scientist from the USSR to be suggested to the Bureau as further member of the Scientific Committee for this symposium and submit this suggestion to the Bureau not later than October 15,1967. Prof. Batchelor has announced that he will probably suggest one or two further names for members of the Scientific Committee in the near future.

1.7 I UT AM Symposium on Instability of Continuous Systems, Karls-ruhe 1969

The General Assembly in Vienna had discussed the following two sub-jects suggested for future symposia: (a) Non-Conservative Systems and Problems of Aeroelasticity (suggested by the German delegation) and (b) General Methods in the Theory of Stability of Continuous Media (suggested by the delegation of the Nether-lands). The General Assembly had then decided that one combined or two separate symposia should be held on these subjects in Karlsruhe in 1969. A Study Group under the chairmanship of Prof. W. T. Koiter was re-quested to investigate the desirability of organizing one single or two separate symposia and to further clarify the areas to be covered. Finally, the General Assembly had authorized the Bureau to make all further decisions. Based on the suggestions submitted to the Bureau by Prof. W. T. Koiter in a very thorough report of the Study Group, the Bureau now took the following decisions: (1) A single symposium will be organized in Karls-ruhe under the title "Instability of Continuous Systems". (2) The sym-posium will be held during the first week of September, 1969, the precise date to be decided by the Scientific Committee. (3) The Scientific Com-mittee will have the following members:

Prof. L.]. F. Broer (Netherlands) } Co-Chairmen Prof. H. Leipholz (Germany) Prof. V. V. Bolotin (USSR) Prof. L. Contri (Italy) Prof. G. Herrmann (USA) Prof. M. D. Kruskal (USA) Prof. J. T. Stuart (UK)

and a further member from France still to be suggested to the Bureau by Prof. M. Roy. The address of the Committee will be that of Prof. H. Leip-holz (Universitat Karlsruhe, Germany). (4) Prof. Leipholz will also be responsible for the local organization. (5) The chairmen of the Scientific

REPORT 1967 9

Committee are requested to investigate whether Springer-Verlag would be prepared to publish the proceedings under the usual favourable condi-tions. (6) There will be the usual IUTAM allocation for this Symposium, the precise sum yet to be decided.

1.8 Sixth Joint /AU I I UTA M Symposium on Cosmical Gas Dynamics In the light of the success of the Vth Symposium held at Nice in 1965, the General Assembly at Vienna had decided to continue cooperation with IAU as joint sponsor of the next Symposium on Cosmical Gas Dynamics envisaged for 1969 or later, and to encourage a stronger par-ticipation of aerodynamicists in this valuable scientific interchange be-tween aerodynamics and astrophysics. It may be expected that the Executive Committee of IAU has discussed the question of a further Symposium on Cosmical Gas Dynamics at its Prague meetings during August 1967,.

Item 2- Discussion of Symposia envisaged for 1969 and later

2.1 Dynamics of Ionized Gases The General Assembly in Vienna had discussed suggestions of the subjects "Magnetodynamics of Fluids" and "Flow of Ionized Gases" as possible topics of future IUTAM symposia and appointed a Study Group with Prof. M. J. Lighthill acting as Secretary to report to the Bureau on the desirability of adopting these suggestions. The Study Group, in its report to the Bureau, has now suggested a IUTAM Symposium on the Dynamics of Ionized Gases as most desirable and appropriate. The main topic should be high-speed gas flow with ionization and recombination. The report points out in detail those aspects that should be considered and those that should or could be excluded. The Study Group recommended the choice of Tokyo as location of the Sym-posium, stating however, that also France would be a highly suitable choice. The Bureau of IUTAM, after considerable discussion of the report of the Study Group, felt that further investigation by the Study Group is neces-sary. Plans for IUTAM symposia already decided for 1968 and 1969 would for financial reasons not allow planning the symposium suggested for an earlier date than in 1970. The Bureau requested that the Study Group should investigate the possibility of organizing the symposium in 1970 jointly with IUPAP and/or IAU since it would not be advisable to hold the symposium in Japan only with the financial support of one Union. The Study Group is requested to report to the Bureau well ahead of the next Bureau Meeting and General Assembly in Stanford.


2.2 Electrohydrodynamics Sir Geoffrey Taylor who had suggested this topic as subject of a future symposium, had been appointed by the General Assembly to act as Secre-tary of a Study Group to discuss in detail the possibility and desirability of such a symposium. The report of the Study Group submitted to the Bureau by Sir Geoffrey came to the conclusion that it would be most desirable to organize this Symposium, suggesting the M.I.T., Cambridge (USA), as location and a date in 1968 as time. Prof. J. Melcher of M.I.T. has expressed his willing-ness to organize the symposium. While agreeing with the Study Group that the subject suggested and reported on in detail would be a most welcome topic for a future sym-posium organized by IUTAM, the Bureau felt that 1968 would be too early to be able to prepare the symposium on a truly international basis. Also, for financial reasons IUTAM would not be able to support a further symposium in 1968. The Bureau would be ready to consider 1969 or 1970 as possible dates. The Bureau requested that the Study Group should investigate the possibility of organizing the symposium suggested as joint conference with IUP AP, although the final decision of the General Assembly should not depend on the cooperation of IUPAP. It was felt, however, that the subject in question offers an excellent possibility for cooperation with IUPAP, the cooperation with other Unions being an important aim of IUTAM.

2.3 Creep in Structures Prof. F. K. G . Odqvist, acting as Secretary of a Study Group appointed by the General Assembly in Vienna to investigate the desirability of a 2nd IUTAM Symposium on Creep in Structures, the first having been held in Stanford in 1960, has submitted a thorough report to the Bureau. The Bureau decided, this decision subject to approval by the General Assembly, that a Second IUTAM Symposium on Creep in Structures will be held in Chalmers' University, Gothenburg, in August of 1970 or, if the Symposium on Electrohydrodynamics planned but not yet decided for 1969 can not be held before 1970, the Symposium on Creep in Struc-tures should be held in 1969, this earlier date then being financially possible. The Study Group further suggested that the Scientific Committee should consist of Professors J. F. Besseling (Netherlands), N.J. Hoff (USA), J. Hult (Sweden), F. K. G. Odqvist (Sweden), and Y. N . Rabotnow (USSR), and perhaps one or two further members with Prof. Hult as Chairman of the Local Committee. The Bureau unanimously approved this suggestion. It is hoped that Prof. Odqvist will act as Chairman of the Scientific Committee.

REPORT 1967 11

2.4 Non-Steady Flow of 'Wctter at High Speeds Professor L. I. Sedov, acting as Secretary of a Study Group appointed by the General Assembly in Vienna, reported to the Bureau on the possibility and desirability of organizing a IUTAM Symposium on Non-Steady Flow of Water at High Speeds. In agreement with this report, the Bureau decided that this Symposium will be held in the USSR in May of 1971, probably in Moscow or in Leningrad. This decision is subject to approval by the General Assembly. The Bureau requested that the Study Group suggest to the Bureau the names of members of the Scientific Committee for this Symposium, wishing to receive this list well ahead of the next meeting of the Bureau in Stanford (August 1968).

2.5 Non-Steady Flow of Multiphase Fluids in Porous Media Although the Bureau unanimously agreed that this topic, investigated as possible subject of a future IUTAM Symposium by a Study Group with Professor L. I. Sedov as Secretary, is of much importance and considerable scientific interest, further considerations will be necessary since, till now, no names for the Scientific Committee and no host institution have been suggested. The Bureau of IUTAM requested that Prof. Sedov further discuss this plan, especially the possible constitution of a Scientific Com-mittee, and the possible location in the USSR of a Symposium on this subject, with Sir Geoffrey Taylor and Prof. M. Roy. Prof. Sedov was requested to report to the Bureau well ahead of the next meeting of the Bureau (Stanford, August 1968).

Item 3- Discussion of further Symposia suggested for the future

3.1 Application of High-Speed Computing to Elastic Structures In the name of the Belgian National Committee on Theoretical and Applied Mechanics Prof. F. Haus quite recently proposed to the Bureau to organize a IUTAM Symposium on the Application of High-Speed Computing to Elastic Structures. In the short time before this meeting of the Bureau, however, the Belgian Committee was not able to offer a more complete definition of the aspects of the subject that should be covered by a symposium and could also not yet suggest a host institution for this symposmm. The Bureau agreed that the subject proposed by the Belgian Committee is of much importance and that IUTAM should become active in this field by planning a symposium on a truly scientific level. Prof. W. T. Koiter has been requested by the Bureau to discuss the aspects of the subject with Prof. J. F. Besseling and Prof. B. M. Fraeys de Veubeke in the near future


and to report to the Bureau. IUTAM would not be able to support this symposium financially before 1970 or 1971.

3.2 Shock Tube Symposium Dr. F. N. Frenkiel, Chairman of the U.S. National Committee, has proposed that IUTAM should sponsor the 7th International Shock Tube Symposium to be held at Toronto, Canada, on June 23-25, 1969. This Symposium will be sponsored by the Division of Fluid Dynamics of the American Physical Society, by the Institute of Aerospace Studies of the University of Toronto, and perhaps by further institutions. The Bureau of IUTAM, agreeing on the scientific importance of the series of Shock Tube Symposia, felt however, that it would be quite contrary to the policies of IUTAM to sponsor scientific conferences to which IUTAM does not contribute scientific support and in the planning of which IUTAM has no part. Not wishing to set a precedent for the future that could seriously endanger the policies of IUT AM, the Bureau declined to sponsor the symposium.

Item 4 - Report of the President on Relations with ICSU

Since there were no new facts to mention, Prof. M. Roy could confine his report to the announcement that the next meeting of the Executive Com-mittee of ICSU will be held in Rome on 9 October 1967.

Item 5 - Report of the Treasurer on the Financial Situation

Prof. Koiter reported: The financial situation has improved somewhat in comparison with the report presented at the General Assembly (IUTAM Report 1966, page 12), mainly due to a reduction in the expenditures for symposia in 1967. It is therefore possible to increase the allocation for the General Assembly and the International Congress at Stanford in 1968 to $ 15.000,- and to allocate grants of $ 5.000,- to the Symposium on thermoinelasticity (East Kilbride, Scotland, June 1968) and of$ 4.000,- to the Symposium on high-speed computing in fluid dynamics (Monterey, California, August 1968). The latter symposium will also benefit from the allocation to the Congress because it will be held in the week preceding the Congress at Stanford. The report of the Treasurer was accepted with thanks and appreciation. (Since the Bureau meeting IUTAM has been informed that the allocation to IUTAM from the UNESCO subvention to ICSU will again amount to$ 7.000,- for the year 1968.)

REPORT 1967 13

Item 6 - Report of the Secretary of the Congress Committee and of Prof. N. ]. Hoff on the Organization of the Xllth Congress at Stanford 1968

An extensive report of Prof. Koiter and Prof. Hoff was received by the Bureau with much satisfaction and with thanks.

Item 7 - Coordination of International Acti'Uities m the Field of Experimental Mechanics

Prof. W. T. Koiter reported to the Bureau on his of this subject with Mr. R. J. Millson, Assistant Secretary, The Institution of Mechanical Engineers, in London on April20, 1967. No further action has been taken in the meantime. Prof. Koiter will report to the Bureau again at the next Bureau Meeting during the XIIth International Congress at Stanford 1968.

Item 8 - Constitution of the Bureau for the period 1968-1972

The Bureau discussed possibilities of nominations for the election of the members of the Bureau for the period 1968-1972, these elections being an item of the agenda of the next General Assembly to be held at Stanford during the XIIth International Congress.

Item 9 - Date of the Next Meeting of the Bureau

The Bureau decided to have its next meeting at Stanford, California, on Tuesday, 27 August 1968, at 8.00 p . m. The next General Assembly of IUTAM will then be held two days later, on Thursday, 29 August 1968, at 8.00 p. m.

Item 10 - Vctria

10.1 The Secretary of the Congress Committee announced that the next meeting of the Congress Committee will be held at Stanford on Sunday, 25 August 1968, immediately before the opening of the XIIth Inter-national Congress.


10.2 As requested by the Bureau of IUTAM at Vienna, Prof. W. Olszak has approadJ.ed the Comin! Europeen du Beton (CEB) in order to discuss scientific problems of mutual interest to IUTAM and CEB. Prof. Olszak now reported to the Bureau that the first object of cooperation will be the problem of "shake-down" and that a working group has been established consisting of W. Olszak (Poland) as Chairman and with the further members V. Bertero (USA), R. Diaz de Cossio (Mexico), and S. Soretz (Austria). - The Bureau accepted this report with thanks and officially appointed Prof. Olszak as representative of IUTAM in this working group.

10.3 Prof. L. I. Sedov kindly accepted to act as representative of IUTAM at the XVIIIth International Astronautical Congress in Belgrade on September 24-29, 1967, organized by the International Astronautical Federation (IAF).

B. Decisions taken by the General Assembly during 1967

Items 2.3 and 2.4 of the Summary Record of the Meeting of the Bureau of IUTAM in Copenhagen on September 6, 1967, reproduced above under A, were concerned with decisions taken by the Bureau that a Second IUTAM Symposium on Creep in Structures will be held in Gothenburg (Sweden) in August of 1970, and that a IUTAM Symposium on Nonsteady Flow of Water at High Speeds will be held in the USSR in May of 1971. These decisions were subject to the approval by the members of the General Assembly. By a circular of October 27, 1967 sent by the Secretary to all members of the General Assembly, approval or statement to the contrary was requested till November 15, 1967. Both decisions were unanimously approved and are therefore now final.

C. Symposia held in 1967

1. IUTAM Symposium on the Generalized Cosserat Continuum and the Continuum Theory of Dislocations with Applications, Freudenstadt and Stuttgart (Germany), August 28 to September 2, 1967.

Chairman: Prof. E. Kroner, Institut fiir Theoretische Physik, TedJ.-nisdJ.e HodJ.schule Clausthal, Clausthal-Zellerfeld (Germany).

REPORT 1967 15

70 participants from 18 countries (Austria, Belgium, CSSR, Denmark, France, Germany, Israel, Italy, Japan, Netherlands, Poland, Rumania, Taiwan, Turkey, UK, USA, USSR, Yugoslavia).

The Proceedings of this Symposium will be published by Springer-Verlag, Berlin.

2. Second IUTAM Symposium on the Theory of Thin Shells, Copen-hagen (Denmark), September 5 to September 9, 1967.

Chairman: Prof. F. Niordson, Technical University of Denmark, Rigensgade 13, Kobenhavn K (Denmark).

75 participants from 16 countries (Argentine, Canada, CSSR, Den-mark, France, Germany, Israel, Italy, Netherlands, Norway, Poland, Rumania, Sweden, UK, USA, USSR).

The Proceedings of this Symposium will be published by Springer-Verlag, Berlin.

3. IUTAM Symposium on the Behaviour of Dense Media under High Dynamic Pressures, Paris (France), September 11 to September 15, 1967.

Chairman: Prof. M. Roy, 55, boulevard Malesherbes, Paris VIlle (France).

Secretary : Dr. J. Berger, Commissariat a l'Energie Atomique, Sevran (Seine et Oise) (France).

186 participants from 12 countries (Australia, Belgium, France, Ger-many, Israel, Italy, Japan, Netherlands, Sweden, UK, USA, USSR).

The Proceedings of this Symposium will be published by Dunod, Paris. Reports on these three Symposia held in 1967 are to be found in

Appendices J, K, and L of this annual IUTAM Report.

D. Symposia decided for 1968 and later

The following list contains all details now available concerning scientific committees, dates, and places of future IUTAM Symposia and therefore more details than were available at the time the Summary Record of the Meeting of the Bureau in Copenhagen (September 6, 1967), reproduced above under A, was written. 1. IUTAM Symposium on Thermoinelasticity, East Kilbride, Glasgow (UK), June 26 to June 28, 1968.

The Scientific Committee consists of the following members: Prof. B. A. Boley, Chairman,

Dept. of Civil Engineering and Engineering Mechanics, Columbia University, New York, N.Y. 10027 (USA)


Prof. F. Buckens (Belgium) Prof. F. K. G. Odqvist (Sweden) Prof. W. Olszak (Poland) Prof. H. Parkus (Austria) Dr. D. G. Sopwith (UK).

2. IUT AM Symposium on High-Speed Computing in Fluid Dynamics, Monterey, Cal. (USA), August 18 to August 24, 1968.

The Scientific Committee consists of the following members: Dr. F. N. Frenkiel, Chairman,

Applied Mathematics Laboratory, David Taylor Model Basin, Washington, D. C. (USA)

Prof. E. Becker (Germany) Prof. G. G. Chernyi (USSR) Prof.]. P. Guiraud (France) Prof. M. ]. Lighthill (UK) Prof. I. Tani (Japan).

3. IUTAM Symposium on the Flow of Fluid-Solid Mixtures, University of Cambridge, Cambridge (UK), March 24 to March 29, 1969.

The Scientific Committee consists of the following members: Prof. G. K. Batchelor, Chairman,

Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Silver Street, Cambridge (UK)

Dr.]. R. A. Pearson, Secretary, Department of Chemical Engineering, University of Cambridge, Cambridge (UK)

Prof. G. N. Abramovich (USSR) Prof. A. Craya (France) Prof. V. A. Vanoni (USA).

4. IUTAM Symposium on Instability of Continuous Systems, Karlsruhe, (Germany), first week of September, 1969.

The Scientific Committee consists of the following members: Prof. L. J. F. Broer (Netherlands) } C Ch . P f H . h 1 o- airmen ro . . Le1p o z

Universitat Karlsruhe, 75 Karlsruhe, Kaiserstra6e 12 (Germany)

Prof. V. V. Bolotin (USSR) Prof. L. Contri (Italy)

REPORT 1967

Prof. G. Herrmann (USA) Prof. M.D. Kruskal (USA) Prof. R. Mazet (France) Prof.]. T. Stuart (UK).

17

5. VIth Joint IAU/IUTAM Symposium on Cosmical Gas Dynamics: Gas Dynamics of the Interstellar Medium, probably at the Crimean Astro-physical Observatory (USSR), during the summer of 1969.

6. Second IUTAM Symposium on Creep in Structures, Gothenburg (Swe-den), August, 1970.

The Scientific Committee consists of the following members: Prof. F. K. G. Odqvist, Chairman,

The Royal Institute of Technology, Stockholm 70 (Sweden)

Prof.]. F. Besseling (Netherlands) Prof. N.]. Hoff (USA) Prof. J. Hult (Sweden) Prof. Y. N. Rabotnow (USSR).

7. IUTAM Symposium on Nonsteady Flow of Water at High Speeds, USSR, May, 1971.

Inquiries should be addressed to Prof. L. I. Sedov, MGU, Zone U, app. 84, Moscow B-234 (USSR).

E. Representation of IUT AM in other organizations

1. Prof. M. Roy, President of IUTAM and IUTAM Representative on the Executive Committee of ICSU (International Council of Scientific Unions), attended the VI!th Meeting of the Executive Committee of ICSU at Rome on 9 and 10 October 1967.

2. Prof. L. I. Sedov kindly acted as Representative of IUTAM at the XVIIIth International Astronautical Congress organized by the Inter-national Astronautical Federation (IAF) in Belgrade, September 24-29, 1967.

3. Prof. H. Ziegler kindly acted as Representative of IUTAM at the XIVth General Assembly of the International Union of Geodesy and Geophysics (IUGG) held in Zurich, September 25 -October 7, 1967.

4. The Bureau of IUTAM, in its meeting in Copenhagen on Sep-tember 6, 1967, appointed Prof. W. Olszak as Representative of IUTAM


in an international working group on "shake-down" established in cooperation with the Comite Europeen du Beton (CEB). Prof. Olszak is chairman of this working group.

5. Prof. M. Roy, President of IUTAM, acted as Honorary Chairman of the First Canadian Congress of Applied Mechanics held in the Univer-site Laval, Quebec, May 22-26, 1967.

6. Prof. J. Ferrandon, Ecole Polytechnique, Paris, is the IUTAM Representative on the Upper Mantle Project (UMP) of ICSU.

7. Prof. Enok Palm, University of Oslo, is the Representative of IUTAM on the ICSU/ IUGG Coordinating Committee on Atmospheric Sciences. He is being assisted by Prof. R. P. Bretherton, University of Cambridge, Prof. R. V. Garcia, University of Buenos Aires, and Prof. R. S. Scorer, London University.

8. Prof. F. K. G. Odqvist, The Royal Institute of Technology, Stock-holm, is the Representative of IUTAM on the ICSU Committee on Data for Science and Technology (CODATA). CODATA held its second meeting in Moscow, May 31 - June 2, 1967 and will hold its third meeting in Frankfurt/Main, June 28-29, 1968. The First International CODATA Conference will be held at Arnoldsheim, near Frankfurt/Main, from June 30 to July 5, 1968.

9. Prof. B. Thwaites, University of Southampton, is serving as Repre-sentative of IUTAM on the Inter-Union Commission for the Teaching of Science (CIES). CIES has announced a Congress on the Integration of Science Teaching to be held at Varna (Bulgaria), September 11-19, 1968.

10. M. Louis Serra, 98, rue Xavier de Maistre, 92-Rueil-Malmaison (France) is acting as IUTAM Observer on the ICSU Committee on Water Research (COW AR) . He is the Acting Secretary of COW AR and has been requested by the Bureau of IUTAM to report on possibilities for the eventual cooperation of IUTAM in some fields of the activities of COWAR.

F. Publications of IUTAM in 1967

In 1967 the following publications of IUTAM appeared:

1. IUTAM Report 1966.

2. The Proceedings of the Vth Joint IAU/IUTAM Symposium on Cosmical Gas Dynamics (Nice, France, 2-15 September 1965), edited by R.N. Thomas, were published under the title "Aerodynamic Pheno-

REPORT 1967 19

mena in Stellar Atmospheres" (IAU Symposium series, No. 28) by Aca-demic Press, London and New York 1967.

3. The Proceedings of the Joint IUGG/IUTAM Symposium on Boundary Layers and Turbulence Including Geophysical Applications (Kyoto, Japan, 19-24 September 1966 ), edited by F. K. Bowden, F. N. Frenkiel, and I. Tani, have been published in "The Physics of Fluids, Supplement 1967", Vol. 10, 9, Part II, pp. 3-321 (1967).

G. Changes of Members of the General Assembly

Prof. Dr. N. Rott (Eidg. Technische Hochschule Zurich, Switzerland) has joined Prof. Dr. H. Ziegler as the second Swiss representative in the General Assembly of IUTAM.

The national organization representing India in the General Assembly of IUTAM will in future be the Indian National Committee for Theo-retical and Applied Mechanics, National Institute of Sciences of India (New Delhi, India).

H. Next Meeting of the Bureau

The next Meeting of the Bureau of IUTAM will be held at Stanford, California, during the week of the Xllth International Congress on Tuesday, August 27, 1968, at 8 p. m.

I. Next General Assembly

The next General Assembly of IUTAM will be held at Stanford, California, during the week of the Xllth International Congress on Thursday, August 29, 1968, at 8 p.m.

J. Xllth International Congress of Applied Mechanics and Meeting of the Congress Committee

The Xllth International Congress of Applied Mechanics will be held at Stanford University, Stanford, California, from August 26 to August 31, 1968. President of the Xllth Congress: Prof. N.J. Hoff, Head of the Department of Aeronautics and Astronautics, Stanford University.

The Executive Committee of the Congress Committee of IUTAM will meet at Stanford on Sunday, August 25, at 14.00. A meeting of the complete Congress Committee will be convened on Sunday, August 27, at 16.00.

/

II. - REPORT OF THE TREASURER N 0

Summarized Statement of Receipts and Payments for the year ended 31st December 1967

u.s. Pounds French Dutch z .., Dollars Sterling Francs Guilders t'l

A. UNRESTRICTED FUNDS z > .., Balances, 1st January 1967 ......... ......... . ... 8,910.99 2,647/10/10 342.99 71,548.37 0 z

Receipts: > t' c:

Subscriptions (Schedule I) 25,930.33 z •• 0 • 0

Bank Interest •••••• 0 • • 3,056.35 z Reimbursement ICSU dues for 1966 496.30

0 "l

Currency transfer I 25.50 I 92.30 .., :::: t'l 0

Totals . . . 8,885.49 2,647/10/10 342.99 101,123.65 t'l .., Payments: 0 > t'

Printing costs IUT AM report for 1966 1,841.51 > ICSU dues for 1967 541.03 z

• • ••• 0 • tl CIES dues for 1967 . . . . . . . . 200.- > ..., Auditor's fee for financial report 1966 560.-

..., f:

Bank Charges 40.35 t'l •••••• 0 ••• tl

Travelling and Subsistence expenses bureau meeting at Copenhagen 1,090.96 a:: t'l

Representation of IUTAM at the meeting of the Committee on Data for () ::::

Science and Technology at Moscow ........... . 303.- > •••• 0 • z

0 Total payments: 4,073.85 "' 503.- - -

Balances, 31st December 1967 . . . . . . . . . . .......... 8,382.49 2,647/10/10 342.99 97,049.80

1

Summarized Statement of Receipts and Payments for the year ended 31st December 1967

u.s. Pounds French Dutch Dollars

B. RESTRICTED FUNDS Sterling Francs Guilders

Balances, 1st January 1967 ...................... 6,438.05 1 2,626/11/11 1 861.10 I 1,045.26 I Receipts:

Amount received from ICSU in respect of Unesco grant 25,200.-Refund of IUT AM's grant to the 1960 Vienna symposium 3,600.-

Totals . . . . . ...... . . . . . . . . . . 6,438.05 1 2,626/11/u 1 861.10 27,754.74 ::<! tT1

Payments: ..., 0

Symposium at Copenhagen (Schedule II) . . . . . . . . . . . . . . . . 17,079.19 ::<! .., Additional costs of 1966 Kyoto symposium . . . . . . . . . . . . . . . 219.07 .... Disbursement in respect of I UTAM-symposium at Stuttgart/Freudenstadt "' 'I (Schedule III) ................ . . . . . . . . . . . 18,000.25 --

Total payments - - - 35,298.51 --Balances, 31st December 1967 . . • •••••••••• 0 •••••• 6,438.05 1 2,626111!11 1 861.10 I 7,543.77 I

SUMMARY OF BALANCES

Unrestricted funds 8,382.49 2,647/10/10 342.99 97,049.80 Restricted funds 6,438.05 1 2,626/11/11 1 861.10 I 7,543.77 I Balances at Banks, 31st December 1967 14,820.54 20/18/11 1,204.09 89,506.03 N -

22

'


" >0 0'> -..

:::1 c .. ....... ... "' -"' ... u c .. .....

I'Q

0

0 00 .-;

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REPORT 1967

Ill. - APPENDICES

A. Statuts de I'Union lnternationale de Mecanique Theorique et Appliquee

PREAMBULE

23

Afin de contribuer plus efficacement au developpement de la science de la Mecanique, le Comite International des Congres de Mecanique Appliquee avait decide, lors de sa reunion a Paris en septembre 1946, de fonder une organisation permanente portant le nom d' « Union lnter-nationale de Mecanique Theorique et Appliquee ».

Cette Union a ete admise dans le Conseil International des Unions Scientifiques par decision du Comite Executif de ce Conseil en 1947.

Dans les reunions tenues a Londres en septembre 1948, il a ete decide que le Comite International continuera, en tant que corps independant de l'Union, a organiser, comme par le passe, les Congres lnternationaux de Mecanique Appliquee et que ce Comite aura le Statut d'une organisation adherente a l'Union.

Lors des reunions de Munich en aofit-septembre 1964, il a ete decide que le Comite International pour les Congres de Mecanique Appliquee serait dissous comme un organisme distinct et possedant le statut d'orga-nisation adherant a l'Union, et qu'il serait remplace par un Comite per-manent pour les Congres lnternationaux comme un organisme permanent et integre dans !'organisation de l'Union sous le nom de « Comite pour les Congres lnternationaux ». 1

I L'Union lnternationale de Mecanique Theorique et Appliquee a pour

buts: a) De former un lien entre des personnes et des organisations nationales

ou internationales s'occupant de recherches scientifiques (theoriques ou experimentales) dans le domaine de la mecanique ou des sciences connexes.

1 Modification approuvee par I' Assemblee Generale du 2 septembre 1964 a Munich et devenue effective a partir du 4 septembre 1964.

'


b) D'organiser les Congres Internationaux de Mecanique Theorique et Appliquee par l'intermediaire du Comite permanent des Congres et d'organiser d'autres reunions internationales sur des sujets du domaine de la mecanique theorique et appliquee. 1

c) De prendre toutes autres initiatives propres a contribuer au develop-pement scientifique de la mecanique theorique ou appliquee.

II L'organe actif de !'Union Internationale de Mecanique Theorique et

Appliquee est son Assemblee Generale. L' Assemblee Generale a pouvoir de decision pour toutes les questions

concernant !'Union, y compris la modification des statuts. Elle peut dele-guer ce pouvoir pour des sujets specifies a des organes appropries.

La composition de l'Assemblee Generale est reglee par !'article IV.

II At a) L'Assemblee Generale etablit un Comite permanent des Congres

qui est responsable pour !'organisation des Congres internationaux de mecanique theorique et appliquee a intervalles reguliers.

b) Le president de !'Union est aussi president du Comite des Congres. Les membres du Comite des Congres soot nommes par 1' Assemblee Gene-rale en tant que personnalites scientifiques activement engagees dans la mecanique theorique et appliquee sans necessairement membres de l'Assemblee Generale.

c) Le Comite des Congres nomme un Secretaire, sans duree definie de fonction.

d) Les regles de fonctionnement du Comite des Congres doivent approuvees par l'Assemblee Generale.

III Des organisations s'occupant d'etudes scientifiques dans le domaine

de la mecanique theorique ou appliquee (ou des unions nationales de telles organisations) peuvent admises par l'Assemblee Generale comme organisations adherentes de !'Union Internationale.

Chaque organisation adherente aura des representants a l' Assemblee Generale de l'Union et paiera une souscription annuelle a !'Union, d'apres les indications de !'article IX.

1 Modification approuvee par I' Assemblee Generale du 2 septembre 1964 a Munich et devenue effective a partir du 4 septembre 1964.

2 Addition approuvee par I' Assemblee Generale du 2 septembre 1964 a Munich et devenue effective a partir du 4 septembre 1964.

REPORT 1967 25

IV

L' Assemblee Generale de l'Union Internationale de Mecanique Theo-rique et Appliquee est formee par : a) Les representants des organisations adherentes a !'Union. b) Les membres elus par l'Assemblee Generale de !'Union, qui doivent

des personnes s'occupant effectivement de recherches scientifiques dans le domaine de la mecanique ou des sciences connexes.

c) Si Generale en decide ainsi, des representants de Com-missions de l'Union.1

Le nombre des membres elus de l'Assemblee Generale appartenant a une nationalite ne devra pas, en general, depasser cinq. Des excep-tions pourront etre faites seulement par decision de l'Assemblee Generale.

La duree du mandat de chaque membre elu sera fixee par l'Assemblee Generale au moment de son election.

L' Assemblee Generale veillera a ce que soient representes de appropriee les pays dans lesquels soot cffectuees des recherches importan-tes de mecanique theorique ou appliquee, mais dans lesquels n'existe pas encore d'organisation nationale.

v Dans le cas ou il est necessaire d'effectuer un vote, chaque membre de

l'Assemblee Generale dispose d'une voix. Tout membre empeche d'assister a une reunion peut, par lettre adressee au Secretaire de l'Union, constituer comme son mandataire un autre membre de l'Assemblee Generale.

Les decisions ordinaires et les elections soot faites a la majorite des votes exprimes. Pour toute modification des statuts, la majorite doit les 2/ 3 des voix.

Dans l'intervalle entre les reunions de 1' Assemblee Generale, le vote peut avoir lieu par correspondance sur propositions faites par le Bureau (article VII) ; dans ce cas, une decision ne sera valable que si le nombre des personnes participant au vote est au moins les 2/3 du nombre total des membres de 1' Assemblee Generale.

VI

Les reunions de l'Assemblee Generale auront lieu aux moments fixes par le Bureau ou sur demande de dix membres au moins de l' Assemblee General e.

1 L' Assemblee Generale du 2 septembre 1964 a Munid1 a decide d'admettre comme Membre de I'Assemblee Generale un Representant du Comite des Congres de IUTAM (voir article II A).


VII Afin de maintenir son activite dans l'intervalle entre les reunions de

l'Assemblee Generale, celle-ci nomme un Bureau compose: d'un president, du president sortant, vice-president, d'un secretaire, d'un tresorier, et de quatre autres membres de 1' Assemblee Generale. Les membres du Bureau soot elus pour une periode de quatre ans au

maximum et sont reeligibles. Les membres nouvellement elus entrent en fonction le 1•r novembre qui suit 1' Assemblee Generale qui les a elus.

Le Bureau doit se reunir au moins une fois par an. Tout membre du Bureau peut, en prevenant par lettre le secretaire, se faire remplacer par un autre membre de l' Assemblee Generale, s'il lui est impossible de prendre part a une reunion.

Le r&le du secretaire est d'assurer les liaisons permanentes pour tout sujet interessant !'Union, y compris les relations avec les organisations adherentes ou etrangeres a !'Union.

Le siege legal de !'Union est la residence du secretaire. Le Bureau est autorise a nommer des tresoriers adjoints dans les pays

ou !'Union a un compte en banque. Les tresoriers adjoints doivent membres de l'Assemblee Generale,

mais ne sont pas necessairement membres du bureau.

VIII Les moyens financiers de !'Union proviennent :

a) des souscriptions annuelles des organisations adherentes ; b) des dons ou subventions.

L'Union etablit chaque annee une liste de bienfaiteurs, dans laquelle soot inscrits les noms des personnes ou des institutions qui ont accorde des dons, des legs ou autres subvention a !'Union.

Le Bureau de !'Union etablit un budget pour chaque annee et admini-stre les finances. II doit soumettre un rapport financier annuel aux mem-bres de 1' Assemblee General e.

IX Le nombre de representants d'une organisation adherente et le mon-

tant de Ia souscription annuelle a payer par cette organisation seront regles d'apres le bareme suivant sur proposition de !'organisation adhe-rente et a pres approbation de I' Assemblee Generale de !'Union.

REPORT 1967 27

Categorie Nombre de Unites de representants souscription annuelle 1

I 1 1 II 2 3

III 3 5 IV 4 8 v 5 12

Le montant d'une unite de souscription annuelle sera de $ 70 1 USA, ou son equivalent en monnaie du pays a Ia date du paiement.

X Dans toutes ses decisions, l' Assemblee Generale s'inspirera de Ia tra-

dition de cooperation scientifique libre et internationale qui s'est deve-loppee dans les Congres Internationaux de Mecanique appliquee.

XI Le present texte fera autorite pour !'interpretation a donner

aux statuts.

B. Resolution de I'Assemblee Generale de Pallanza (27 juln 1950)

En confirmation des opinions exprimees precedemment a 1' Assemblee Generale de septembre 1948 au moment ou les presents statuts ont ete adoptes:

1. L' Assemblee Generale estime que, dans les pays ou il existe plus d'une organisation nationale active dans le champ de Ia mecanique theori-que et appliquee, un comite special de coordination doit forme. En general, il est convenu de reconnahre seulement une organisation ad-herente dans chaque pays.

2. L' Assemblee Generale estime que sa composition devra gradu-ellement modifiee de fas:on a ce qu'elle comprenne principalement les representants des organisations adherentes a !'Union, la categorie des membres elus devant reservee pour des cas particuliers et exception-nels. Dans ce but, elle donne avis de son intention de reduire le nombre des membres elus lorsque, en 1952, ils seront arrives au terme de leur mandat.

1 Modification appom!e a Ia suite du vote de I' Assemblee Generale de Stresa (Italie), 1 er septembre 1960.

'


C. Regles de fonctionnement 1 du Comite des Congres de IUTAM (4 septembre 1964)

1. Le Comite des Congres se reunit au moins une fois lors de chaque Congres.

2. Le Comite des Congres peut instituer un Comite Executif charge d'entreprendre toutes les actions necessaires de sa part pendant la periode qui s'ecoule entre deux Congres successifs, et de lui faire un rapport a sa prochaine reunion. Le Comite Executif comprendra le president et le secretaire du Comite des Congres et un ou plusieurs membres designes par le Comite des Congres.

3. L'organisation effective d'un Congres est confiee a un Comite local d'Organisation, elu par le pays ou !'organisation qui invite, et ce Comite est egalement responsable de la publication des Comptes Rendus du Congres. Le Comite d'Organisation fera son rapport au Comite des Congres soit au cours du Congres qu'il organise, soit avant, s'il le juge preferable.

4. Le Comite d'Organisation devra obtenir !'approbation du Comite des Congres (normalement par l'intermediaire du Comite Executif) pour toutes les affaires qui se rapportent a la politique generale du Comite des Congres, en particulier pour celles qui concernent :

4.1 le but du Congres; 4.2 la selection des communications pour le Congres; 4.3 le choix des lectures generales pour le Congres; 4.4 la designation des presidents de sessions du Congres. 5. Le Comite d'Organisation percevra, au nom de l'Union Inter-

nationale de Mecanique Theorique et Appliquee, de tous les membres du Congres une contribution supplementaire ne devant pas depasser $ 1 pour couvrir les depenses administratives, en plus de la contribution pour le Congres lui-m&me. Les contributions supplementaires seront reversees a IUTAM immediatement apres le Congrk

D. Statutes of the International Union of Theoretical and Applied Mechanics

PREAMBLE

In order to be more fully equipped to promote development of the science of mechanics, the International Committee for the Congresses of

1 Regles approuvees par l' Assemblee Generale du 2 septembre 1964 a Munich et devenues effectives a partir du 4 septembre 1964.

REPORT 1967 29

Applied Mechanics at its meeting at Paris in September 946 to found a permanent organization, called "The InternatiOnal Umon of Theoretical and Applied Mechanics".

This Union has been admitted into the International Council of Scientific Unions by decision of the Executive Committee of this Council in 1947.

At the meetings at London in September 1948 it was decided that the International Committee would continue to organize the Congresses of Applied Mechanics as an independent body as in the past, that International Committee would have the status of an adhenng orgam-zation of the Union.

At the meetings at Munich in August-September 1964 it was decided that the International Committee for the Congresses of Applied Me-chanics would be dissolved as an independent body with the status of an adhering organization of the Union, and that it would be replaced by a standing Committee for International Congresses as an integral part of the organization of the Union.1

I The objects of the International Union of Theoretical and Applied

Mechanics are: a) To form a link between persons and national or international organi-

zations engaged in scientific work (theoretical or experimental) in mechanics or in related sciences;

b) To organize international congresses of and applied n:e-chanics through a standing Congress Comm.mee, . an.d to or.gamze other international meetings for subjects fallmg w1thm the f1eld of theoretical and applied mechanics 1 ;

c) To engage in other activities meant to promote development of me-chanics, both theoretical and applied, as a branch of science.

II The active organ of the International Union of Theoretical and

Applied Mechanics is its General Assembly. The General Assembly has power to decide all questions affecting the

Union, including alteration of the statutes. On a specified question it may delegate this power to appropriate bodies.

The composition of the General Assembly is regulated in Article IV.

1 Modification approved by the General Assembly of September 2, 1964 in Munich and become effective from September 4, 1964. •

'


II A 1

.a) The General Assembly establishes a standing Congress Committee wh1ch is responsible for the organization of international congresses of theoretical and applied mechanics at regular intervals.

b) The president of the Union shall also serve as president of the Committee. The members of the Congress Committee are ap-

pomted by the General Assembly as scientists active in theoretical and applied mechanics who need not be members of the General Assembly.

c) The Congress Committee appoints a secretary, without stated terms of office.

d) The rules of procedure of the Congress Committee shall be ap-proved by the General Assembly.

III Org.anizations. occupie.d in scientific work in theoretical or applied

mechamcs (or natiOnal umons of such organizations) can be admitted by the General Assembly as adhering organizations of the International Union.

Each adhering organization shall have representatives in the General Assembly of the International Union, and pay an annual subscription to the Union in accordance with Article IX.

IV The General Assembly of the International Union of Theoretical and

Applied Mechanics is composed of: a) Representatives of the organizations adhering to the Union; b) Members elected by the General Assembly of the Union, who shall be

persons actually engaged in scientific work in mechanics or in related sciences;

c) If so decided by the General Assembly, representatives of Commit-tees. 2

The number of elected members of the General Assembly of the same nationality in general should not exceed five. Exceptions can be made only by decision of the General Assembly. The term of each elected member shall be determined by the General Assembly at the time of his election.

1 Addition approved by the General Assembly of September 2, 1964 in Munich and become effective from September 4, 1964.

2 The General Assembly of September 2, 1964 in Munich has decided to admit as Member of the General Assembly a representative of the standing Congress Committee of IUTAM (see article II A).

REPORT 1967 31

The General Assembly shall provide for adequate representation of countries where important research is carried out in theoretical or applied mechanics, but where a national organization does not yet exist.

v When voting is necessary every member of the General Assembly

shall dispose of one vote. Any member who may be unable to attend a meeting may by a letter to the secretary constitute another member of the General Assembly as his proxy.

For ordinary decisions and for elections a simple majority of the votes brought forward is required. For an alteration of the statutes the majority required is 2/3 of the votes brought forward.

Between meetings of the General Assembly voting may be carried out by correspondence upon proposals made by the Bureau (section VII); in this case decisions will be valid only provided the number of persons taking part in the vote is not less than 2/ 3 of the total membership of the General Assembly.

VI Meetings of the General Assembly will take place at times decided

by the Bureau or on request of at least 10 members of the General Assembly.

VII In order to carry out work between the meetings of the General

Assembly, the latter appoints a Bureau, consisting of: A president, The retiring president, who shall serve as vice-president, A secretary, A treasurer, And four other members of the General Assembly. The members of the Bureau will be elected for a period of at most

4 years and will be eligible for re-election. Newly elected members of the Bureau enter into office on the date of November 1st, following the General Assembly at which they have been elected.

The Bureau will meet at least every year. A member of the Bureau who is prevented from attending a meeting may by a letter to the secre-tary designate another member of the General Assembly to replace him.

The function of the secretary will be to act as a permanent center for matters affecting the Union, including relations with adhering or outside organizations.

The legal domicile of the Union shall be the place where the secretary lives.


The Bureau is authorized to appoint assistant-treasurers in those countries where the Union has a bank account.

The assistant-treasurers must be members of the General Assembly but need not to be members of the Bureau.

VIII The financial means of the Union are formed by:

a) the annual subscriptions of the adhering organizations; b) gifts and grants.

The Union shall maintain a roll of benefactors on which shall be in-scribed annually the names of those persons or institutions which have accorded gifts, legacies or other subventions to the Union.

The Bureau of the Union shall draft a budget for each coming year, and shall administrate the finances. The Bureau shall submit an annual financial report to the members of the General Assembly.

IX The number of representatives of an adhering organization and the

amount of the annual subscription to be paid by that organization will be regulated according to one of the following categories, as proposed by the adhering organization and after approval of the General Assembly of the Union:

Category I

II III IV v

Number of representatives

1 2 3 4 5

Units of annual subscription 1

1 3 5 8

12 The amount of the unit annual subscription will be U. S. $ 70 1 or its

equivalent in local currency at the date of payment.

X In all its decisions the General Assembly shall be guided by the tra-

dition of free international scientific cooperation which has been de-veloped in the International Congresses for Applied Mechanics.

XI The French text of the statutes (of which the above is a translation)

shall be considered to be the authoritative text.

1 Modification introduced after the vote of the General Assembly m Stresa (Italy)- September 1st, 1960.

REPORT 1967

E. Resolution of the General Assembly at Pallanza (June 27, 1950)

33

In confirmation of the views already expressed at the General As-sembly of September 1948 when the present statutes were framed:

1. The General Assembly expects that in those countries where more than one national organization is active in theoretical and applied me-chanics, a national coordinating committee will be formed. In general it is expected to recognize only one adhering body in each country;

2. The General Assembly believes that a gradual transition should be made in its composition, so that ultimately it will consist mainly of representatives of organizations adhering to the Union with the category of elected members reserved for exceptional and unusual cases. To this end it gives notices of its intention to reduce the number of elected mem-bers when the terms of the present elected members expire in 1952.

F. Rules of procedure, for the Congress Committee of IUTAM (September 4, 1964)

1. The Congress Committee meets at least once at every Congress. 2. The Congress Committee may appoint an Executive Committee to

take all necessary actions on its behalf in the period between two suc-cessive Congresses, and to report to it at its next meeting. The Executive Committee will consist of the president, the secretary and one or more members appointed by the Congress Committee.

3. The actual organization of a Congress is delegated to a local Or-ganizing Committee, elected by the host-country or host-organization, which is also responsible for publication of its Proceedings. The Organiz-ing Committee will report to the Congress Committee either during or, if it sees fit, before the Congress which it organizes.

4. The Organizing Committee will obtain the approval of the Con-gress Committee (normally through the Executive Committee) with re-gard to all matters affecting the general policy of the Congress Commit-tee, in particular with regard to:

4.1 the scope of the Congress; 4.2 the screening of papers for the Congress; 4.3 the selection of general lectures for the Congress; 4.4 the appointment of chairmen of sessions of the Congress.

t Rules adopted by the General Assembly of September 2, 1964 in Munich and become effective from September 4, 1964.


5. The Organizing Committee will levy a fee not exceeding $ 1 on behalf of the International Union of Theoretical and Applied Mechan-ics, for administrative expenses, from all Congress members, in addition to the fee required for the Congress itself. The additional fees will be paid over to IUTAM immediately after the Congress.

G. Adhering Organizations and Members of the General Assembly (as of December 31, 1967)

a) Adhering Organizations and Representatives: 1. The Royal Society (1948), 6 Carlton House Terrace, London SW 1

(UK) President: Prof. P.M. S. Blackett, C.H. Executive Secretary: Dr. D. C. Martin, C.B.E., The Royal Society, 6 Carlton House Terrace, London SW 1 Representatives: Prof. G. K. Batchelor, F.R.S., Department of Ap-plied Mathematics and Theoretical Physics, Silver Street, The Uni-versity of Cambridge, Cambridge Prof. R. E. D. Bishop, Department of Mechanical Engineering, Uni-versity College London, Gower Street, London WC 1 Dr. D. Kiichemann, C.B.E., F.R.S., Aeronautical Department, Royal Aircraft Establishment, Farnborough, Hants _ Prof. M. J. Lighthill, F.R.S., Imperial College, Prince Consort Road, London SW 7 Prof. G. Temple, C.B.E., F.R.S., Mathematical Institute, 24-29 St. Giles, University of Oxford, Oxford

2. National Hungarian Committee for IUTAM of the Hungarian Academy of Sciences (1948), Budapest (Hungary) President: Prof. Dr. A. Geleji, Member of the Academy, Budapest, V., Nador utca 7 Secretary: Prof. Dr. J. Szabo, Budapest, XI., Miiegyetem rakpart 3 Representative: Prof. Dr. A. Geleji

3. Co mite National de Mecanique (1949), 55, boulevard Males-herbes, Paris VIlle (France) President: Prof. H. Villat, 47, boulevardAuguste-Blanqui, Paris XIIIe Secretary-General: Prof. Maurice Roy, 55, boulevard Malesherbes, Paris VIlle Representatives: Prof. Luc Gauthier, 14, rue du Lycee, Sceaux (92) Prof. Paul Germain, 3, avenue de Champaubert, Paris XV6

Dr. Robert Legendre, 17, rue Massenet, Paris XVI6

Prof. Maurice Roy

REPORT 1967 35

4. The Czechoslovak Committee of Theoretical and Applied Mechanics of the Czechoslovak Academy of Sciences (1949; year of change of organization: 1957), Puskinovo m1m. 9, Praha 6 (Czechoslovakia) President: Dr. Ing. Jan Jerie, Komornicka 27, Praha 6 Representatives: Dr. Ing. Jan Jerie J. Kozesnik, Member of the Academy, Bureau of the President of the Czechoslovak Academy of Sciences, Narodn1 tr. 3, Praha 1

5. The National Committee on Theoretical and Applied Mechanics of the Norwegian Academy of Science and Letters (1949), University of Oslo, Blindern, Oslo 3 (Norway) President: Prof. Enok Palm, University of Oslo, Blindern, Oslo 3 Representative: Prof. Enok Palm

6. Consiglio Nazionale delle Ricerche (1949), Piazzale delle Scienze, 7, Roma (Italy) President: Prof. Giovanni Polvani Secretary-General: Dr. Franco Rolla Representatives: Prof. Gustavo Colonnetti, Istituto Dinamometrico Italiano, Strada delle Cacce 73, 10135 Torino Prof. Bruno Finzi, Via Bonardi 3, Milano

7. Comite National de Mecanique Theorique et Appliquee de la Classe des Sciences de l' Academie Royale de Belgique (1949), Palais des Academies, Bruxelles (Belgium) President: Prof. L. Tison, 61 Braamstraat, Gentbrugge Secretary: Prof. F. Haus, 99 rue du Colonel Chaltin, Bruxelles 18 Representatives: Prof. F. Buckens, 3, av. des Hetres, Heverle-Louvain Prof. P. Van Eepoel, 542, av. de la Couronne, Bruxelles 5 Prof. F. Haus

8. The U. S. National Committee on Theoretical and Applied Mechanics (1949), Navy Ship Research and Development Center, Washington, D. C., 20007 (USA) Chairman: Prof. Daniel C. Drucker, Division of Engineering, Brown University, Providence, Rhode Island, 02912 Vice-Chairman: Prof. G. F. Carrier, 306 Pierce Hall, Harvard Uni-versity, Cambridge, Mass., 02138 Secretary: 0. B. Schier, II, The American Society of Mechanical Engineers, 345 East 47th Street, New York, N.Y., 10017 Representatives: Prof. G. F. Carrier Prof. Daniel C. Drucker Dr. N. Frenkiel, Navy Ship Research and Development Center, Washington, D. C., 20007


Prof. Nicholas J. Hoff, Head, Department of Aeronautics and Astro-nautics, Stanford University, Stanford, California Prof. William Prager, University of California, P. 0. Box 109, La Jolla, California, 92037

9. The Academy of Technical Sciences of Denmark (1949) (Akademiet for de Tekniske Videnskaber), Rigensgade 11, Copenhagen K. (Den-mark) President: Direktor N. E. Holmblad, Det Store Nordiske Telegraf-Selskab, Kgs. Nytorv 26-28, K0benhavn K Secretary: Bjerre Lavesen Representative: Prof. Frithiof Niordson, Technical University of Denmark, Rigensgade 13, K0benhavn K

10. Swedish National Committee for Mechanics (1950), The Royal Insti-tute of Technology, Stockholm 70 (Sweden) President: Prof. Folke K. G. Odqvist, The Royal Institute of Tech-nology, Stockholm 70 Secretary: Dr. Janne Carlsson, Division of Strength of Materials, The Royal Institute of Technology, Stockholm 70 Representatives: Prof. Folke K.G.Odqvist Prof. S. Berndt, The Royal Intitute of Technology, Stockholm 70

11. The Turkish Society for Pure and Applied Mathematics (1950), c.o. Dr. Nazim Terzioglu, Fen Fakultesi, Istanbul (Turkey)

12. The Indian National Committee for Theoretical and Applied Me-chanics (1950; year of change of organization: 1967), National Insti-tute of Sciences of India, Bahadur Shah Zafar Marg, New Delhi (India)

13. Eidgenossische Technische Hochschule (1950), Leonhardstrasse 33, 8006 Zurich (Switzerland) President: Dr. Jakob Burckhardt, Eidgenossische Technische Hoch-schule, Leonhardstrasse 33, 8006 Zurich Secretary: Dr. Hans Rudolf Denzler, Leonhardstrasse 33, 8006 Zurich Representatives: Prof. Dr.Hans Ziegler,Weiherweg 6, 8803 Ruschlikon Prof. Dr. Niklaus Rott, Eidgenossische Technische Hochschule, Sonnegg-strasse 3, 8006 Zurich

14. Gesellschaft fur Angewandte Mathematik und Mechanik (1950), Uni-versitat Hamburg, Institut fur Angewandte Mathematik, 2 Hamburg 13, Rothenbaumchaussee 67/69 (Germany) President: Prof. Dr. K. Wieghardt, lnstitut fur Schiffbau der Uni-versitat Hamburg, 2 Hamburg 33, Lammersieth 90

REPORT 1967 37

Secretary: Prof. Dr. J. Dorr, l nstitut fiir Angewandte Mathematik der Universitat des Saarlandes, 66 Saarbrucken Representatives: Prof. Dr. E. Becker, Technische Hochschule Darm-stadt, 61 Darmstadt Prof. Dr. H . Gorder, 78 Freiburg i. Br., Hebelstrasse 40 Prof. Dr. E. Mettler, 75 Karlsruhe-Durlach, Geigersbergstrasse 12 N .N.

15. The Israel Academy of Sciences and Humanities (1950; year of change of the name of the organization: 1965), Jerusalem, P . 0. Box 4040 (Israel) President: Prof. Dr. A. Katchalsky Representative: Prof. Dr. M. Reiner, Technion, Israel Institute of Technology, Haifa, P . 0 . Box 4910

16. TheNationallnstituteof Aerospace Technology" Esteban Terradas " (1950) (lnstituto Nacional de Tecnica Aerospacial " Esteban Ter-radas " ), Calle Serrano 43, Madrid (Spain) President: Sr. Rafael Calvo Representatives: Sr. Rafael Calvo, Presidente del INTA Sr. A. Perez-Marin, Director General del INTA

17. Die Osterreichische Akademie der Wissenschaften (1951 ), Dr. lgnaz-Seipel-Platz 2, A 1010 Wien (Austria) President: Prof. Dr. h. c. mont. Erich Schmid Secretary-General: Prof. Dr. Herbert Hunger Representative: Prof. Dr. Heinz Parkus, Technische Hochschule Wien, Karlsplatz 13, A 1040 Wien

18. The National Committee for Theoretical and Applied Mechanics of the Science Council of Japan (1951), Ueno Park, Tokyo (Japan) President : Prof. !tiro Tani, Institute of Space and Aeronautical Science, University of Tokyo, Komaba, Meguro-ku, Tokyo Representatives: Prof. Isao lmai, Department of Physics, Faculty of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo Prof. !tiro Tani Prof. Masao Yoshiki, Department of Naval Architecture, Faculty of Engineering, University of Tokyo, Hongo, Bunkyo-ku, Tokyo

19. Yugoslav Society of Mechanics (1952; year of change of organization: 1960), 73, Bulevar Revolucije, P. 0 . Box 895, Belgrade (Yugoslavia) Representative: Prof. Dr. lng. Anton Kuhelj, Institute of Mechanics, Lepi pot 13, Ljubljana

'


20. Section for Mechanics of the Division of Applied Sciences of the Royal Institute of Engineers (1952; year of change of organization: 1957), Mekelweg 2, Delft (Netherlands) President: Prof. dr. ir. J. F. Besseling, Mekelweg 2, Delft Secretary: Prof. dr. ir. J. G. Lekkerkerker Representatives: Prof. dr. ir. J. F. Besseling Prof. ir. J. 0. Hinze, Rotterdamseweg 145, Delft

21. The Finish National Committee on Mechanics (1952), The Institute of Technology, Helsinki (Finland) President: Prof. S. E. Stenij, The Institute of Technology, Kulosaa-rentie 28, Helsinki Representative: Prof. S. E. Stenij

22. The Polish Academy of Sciences (1952), Palac Kultury Nauki, Warsaw (Poland) President: Prof. Dr. J. Groszkowski Secretary-General: Prof. Dr. H. Jablonski Representatives: Prof. Dr. M. Lunc, Palac Kultury i Nauki, Warszawa Prof. Dr. W. Nowacki, Palac Kultury i Nauki, Warszawa Prof. Dr. W. Olszak, ul. Swietokrzyska 21, Warszawa

23. USSR National Committee on Theoretical and Applied Mechanics (1956), Leningradskii prospekt 7, Moscow A-40 (USSR) President: Prof. N. I. Muskhelishvili, Georgian Academy of Sciences, ul. Dzerjinskii 8, Tbilisi Vice-President: Prof. L. I. Sedov, MGU, Zone U, app. 84, Moscow B-234 Secretary: Prof. G. K. Mikhailov, Institute of Mechanics of the USSR Academy of Sciences, Leningradskii prospekt 7, Moscow A-40 Representatives: Prof. N. I. Muskhelishvili Prof. L. I. Sedov Prof. A. A. Ilyuschin, Department of Mechanics and Mathematics, University of Moscow, Moscow B-234 Prof. A. A. Nikolskii, Computing Center of the USSR Academy of Sciences, ul. Vavilova 28, Moscow B-333 Prof. V. V. Sokolovskii, Institute of Mechanics of the USSR Academy of Sciences, Leningradskii prospekt 7, Moscow A-40

24. Institut de Mecanique Appliquee de l'Academie de la RPR (1956), Bucarest (Roumanie) Representative: Prof. Elie Carafoli, Institut de Mecanique Appliquee, 15, rue Const. Mille, Bucarest

REPORT 1967 39

25. Physics Department, Faculty of Engineering of the University of Buenos Aires (1959) (Departamento de Fisica, Facultad de Ingenieria de Ia Universidad de Buenos Aires), Paseo Colon 850, Buenos Aires (Argentine) Director: Dr. Felix Cernuschi Representative: Dr. Felix Cernuschi

26. The National Research Council of Canada (1963), Ottawa 2, Ontario (Canada) President: Dr. B. G. Ballard Secretary: Dr. J.D. Babbitt Representatives: Dr. W. D. Baines, University of Toronto, Toronto 5, Ontario Dr. J. Dubuc, Ecole Polytechnique, Montreal 26, Quebec Dr. F. P. J. Rimrott, University of Toronto, Toronto 5, Ontario Dr. P. Savic, National Research Council, Ottawa 2, Ontario

27. The Australian National Committee for Theoretical and Applied Mechanics of the Australian Academy of Science (1964 ), Gordon Street, Canberra City, Australian Capital Territory (Australia) Chairman: Prof. H. S. Green, FAA, Department of Mathematical Physics, University of Adelaide, Adelaide, S.A. Secretary: J. Deeble, Australian Academy of Science, Gordon Street, Canberra City, Australian Capital Territory Representative: Prof. H . S. Green

b) Members elected by the General Assembly for the period 1964-1968: Prof. J. Ackeret, Institut fi.ir Aerodynamik, Eidgenossische Technische

Hochschule, Sonneggstrasse 3, Zurich 6 (Switzerland) Prof. J. M. Burgers, Institute for Fluid Dynamics and Applied Mathe-

matics, University of Maryland, 4622 Knox Road, apt. 7, College Park, Maryland (USA)

Prof. G. A. Crocco, Via Alessandro Torlonia 25, Roma (Italy) Prof. S. Goldstein, The Division of Engineering and Applied Physics,

Pierce Hall, Harvard University, Cambridge, Mass., 02138 (USA) Prof. Y. H. Ku, University of Pennsylvania, 200 S 33rd Street, Phila-

delphia 4, Pennsylvania (USA) Prof. W. Rubinowicz, Hoza 74/4, Warszawa (Poland) Sir Richard V. Southwell, Imperial College, The Old House, Trumping-

ton, Cambridge (UK) Sir Geoffrey Taylor, Farmfield, Huntingdon Road, Cambridge (UK) Prof. S. P. Timoshenko, Division of Engineering Mechanics, Stanford

University, Stanford, California (USA) Prof. Waloddi Weibull, Bockamollan, Brosarps Station (Sweden)

40 INTERNATIONAL UNION 0F THEORETICAL AND APPLIED MECHANICS

c) Committees of JUT AM represented in the General Assembly:

1. Congress Committee of IUTAM (1964) Secretary: Prof. W. T. Koiter, Mekelweg 2, Delft (Netherlands) Representative: Prof. W. T. Koiter

H. Members of the Congress Committee of IUTAM

Prof. J. Ackeret, Institut fiir Aerodynamik, Eidgenossische Technische Hochschule, Sonneggstrasse 3, Zurich 6 (Switzerland)

G. K. Batchelor, Department of Applied Mathematics and Theo-retical Physics, The University of Cambridge, Silver Street, Cam-bridge (UK)

Prof. J. M. Burgers, Institute for Fluid Dynamics and Applied Mathe-matics, University of Maryland, 4622 Knox Road, apt. 7, College Park, Maryland (USA)

Prof. A. Caquot, 1, rue Beethoven, Paris XVIe (France) Prof. G. Colonnetti, Istituto Dinamometrico Italiano, Strada delle Cacce

73, 10135 Torino (Italy) Prof. G. A. Crocco, Via Alessandro Torlonia 25, Roma (Italy) Prof. S. Goldstein, Division of Engineering and Applied Physics, Pierce

Hall, Harvard University, Cambridge, Mass., 02138 (USA) H. Gorder, Albert-Ludwigs-Universitat, Hebelstrasse 40, Frei-

burg i. Br. (Germany) Prof. J.P. den Hartog, Massachusetts Institute of Technology, Room

3-282, Cambridge 39, Massachusetts (USA) W. T. Koiter, Mekelweg 2, Delft (Netherlands)

Prof. N. I. Muskhelishvili, Georgian Academy of Sciences, ul. Dzerjin-skii 8, Tbilisi (USSR)

Prof. F. K. G. Odqvist, Kungl. Tekniska Hogskolan, Stockholm 70 (Sweden)

*Prof. M. Roy, 55, boulevard Malesherbes, Paris VIIIe (France) Prof. W. Rubinowicz, Hoza 74/4, Warszawa (Poland) Prof. L. I. Sedov, Leningrad Road 7, Moscow D-40 (USSR) Prof. H. Solberg, Oslo University, Blindern (Norway) Prof. I. Tani, Institute of Space and Aeronautical Science, University of

Tokyo, Komaba, Meguro-ku, Tokyo (Japan) Sir Geoffrey Taylor, Farmfield, Huntingdon Road, Cambridge (UK) Prof. G. Temple, Mathematical Institute, 24-29 St. Giles, University of

Oxford, Oxford (UK)

* Members of Executive Committee.

REPORT 1967 41

Prof. S. P. Timoshenko, Division of Engineering Mechanics, Stanford University, Stanford, California (USA)

Prof. W. Tollmien, Max-Planck-Institut fUr Stromungsforschung, Bot-tingerstrasse 6/8, Gottingen (Germany)

Prof. W. Weibull, Bockamollan, Brosarps Station (Sweden)

I. Bureau of the Union

The following members of the Bureau of IUTAM have been elected for the period November 1, 1964- October 31, 1968: President: Prof. M. Roy, 55, boulevard Malesherbes, Paris VIIIe

(France) Vice-President: Prof. G. Temple, Mathematical Institute, 24-29 St. Gi-

Secretary:

Treasurer: Members:

les, Oxford (UK) Prof. H. Gorder, Hebelstrasse 40, 78 Freiburg i. Br. (Germany) Prof. W. T. Koiter, Mekelweg 2, Delft (Netherlands) Prof. N.J. Hoff, Department of Aeronautics and Astro-nautics, Stanford University, Stanford, Cal. (USA) Prof. W. Olszak, ul. Swietokrzyska 21, Warszawa (Poland) Prof. H. Parkus, Technische Hochschule Wien, Karls-platz 13, A 1040 Wien (Austria) Prof. L. I. Sedov, MGU, Zone U, app. 84, Moscow B-234 (USSR)

J. IUTAM Symposium on the Generalized Cosserat Continuum and the Continuum Theory of Dislocations with Applications

The proposal of the symposium originated with the German Society of Applied Mathematics and Mechanics (GAMM) late in 1964 and was studied by a committee of IUTAM especially appointed for this purpose. The committee agreed unanimously that the topic in question represents an important aspect of the current development of continuum mechanics both from the purely theoretical point of view and in connection with possible applications to actual materials. The committee further agreed that a symposium on this topic would be desirable in order to clarify the present issues by personal discussions between the experts most active in the field. The committee hoped in particular that such a symposium would contribute to the physical interpretation of available mathematical theories.


The scope of the symposium was described by the committee as follows:

1. Theory of the Cosserat continuum and its various generalizations. 2. Kinematics and dynamics of dislocations and their description by

means of a continuous model. 3. Applications in fluid mechanics and solid mechanics, in particular with

reference to the dislocation theory of creep and plasticity. The report of the committee was accepted by the Permanent Bureau

of IUTAM. The Bureau appointed an International Scientific Committee consisting of Professors A . E. Green (Newcastle), W. T. Koiter (Delft), K. Kondo (Tokyo), E. Kroner, chairman (Clausthal), R. D. Mindlin (New York), and L. I. Sedov (Moscow). It agreed to a Local Organizing Com-mittee consisting of Professors J. H. Argyris (Stuttgart), W. Gunther (Karlsruhe), A. Seeger, chairman (Stuttgart), U . Wegner (Stuttgart), K. Zoller (Stuttgart), and Dipl.-Phys. K.-H. Anthony, secretary (Stutt-gart).

The symposium took place from August 28 through August 31, 1967 in Freudenstadt, Black Forest (Germany) and was continued through September 2, 1967 in Stuttgart (Germany). It was an important and intended feature of this symposium that the 70 invited participants from 18 nations varied widely in scientific background, ranging from mathe-matics and solid state physics to engineering sciences.

In order to facilitate the communication among these groups, the rather high number of 6 introductory survey lectures a 60 minutes was scheduled. 5 special lectures a 45 minutes served the purpose of informing the participants about recent progress in well-defined areas of special importance. Beside these lectures were presented 15 research lectures a 30 minutes and 18 brief communications a 10 minutes. Every participant who was not scheduled for a regular lecture had the right to present a brief communication. This opportunity not only made those participants feel happier; but it also provided a valuable addition to the scientific content of the symposium.

Last, but not least, are to be mentioned two extra discussion sessions of 90 and 120 minutes respectively under the chairmanship of A. E. Green and P. M. Naghdi and of A. Seeger and R. Bullough respectively. These sessions could have been extended almost endlessly as far as content and will for discussions were concerned.

The lively discussions showed clearly how difficult communication is between people who speak a different scientific language, even if the field of interest is closely related. Nevertheless, people did communicate and found that it was worth the attempt to understand each other. It is hoped that with this communication something has started which will

REPORT 1967 43

continue and will prove to be valuable in the further development of our field of interest.

Though the expressed opinions on the range of applicability of the new continuum theories - one of the main topics of the symposium -varied widely from deep pessimism to high optimism, it has become clear, in particular by comparison with lattice type theories, that the new con-tinuum theories are, indeed, relevant to physics. Perhaps one of the most significant insights has been that the mass point and, in particular, the atomic lattice theories have quite a number of different (asymptot ic) con-tinuum images depending on the arrangement of the mass points and on their interactions. In important cases the continuum limits of the lattice theories could be shown to coincide with continuum theories which had been developed recently in a purely phenomenological manner.

The proceedings of the symposium will be printed by Springer-Verlag and it is believed that they will provide a t imely account of the present status of the new movement in continuum mechanics which was the topic of this symposium.

Special thanks for generous financial support are due to the German Federal Ministry of Scientific Research and to the Ministry of Education of State Baden-Wurttemberg. Thanks are also due to M. Reiner for the excellent chairmanship of the opening session and to U. Wegner for his great engagement in the planning and in the financial securing of the sym-posium. Unfortunately, Professor Wegner was not able to attend the symposium. Furtherto, the present reporter is certain that many of the participants w ill remember the gay cocktail party which took place by invitation of GAMM and produced a congenial mood at the very be-ginning of the symposium.

The report is closed with a list of the lectures presented at the sym-posmm:

List of papers presented at the I UTA M symposium in Freudenstadt and Stuttgart

Tuesday , August 29:

R. A. Toupin : On Continuum Theories of D islocations and Oriented Media.

B. A. Bilby: Geometry and Continuum Mechanics. G. Herrmann and J.D. Achenbach: Applications of Theories of General-

ized Continua to the Dynamics of C omposite Materials. A. E. Green and P . M. N aghdi : The Cosserat Surface. A. E. Green and N. Laws : A General Theory of Rods.


E. Reissner and F. Y. M. Wan: A Note on Gunther's Analysis of Couple Stress.

M. Dikmen: Note on the Statics and Stability of Polar Hyperelastic Materials.

G. Grioli: On the Thermodynamic Potential of Cosserat's Continua. H. Schaefer: The Basic Affine Connection in a Cosserat Continuum. M. Misicu: The Generalized Dual Continuum in Elasticity and Dis-

location Theory.

Wednesday, August 30:

R. S. Rivlin: Generalized Mechanics of Continua. E. Sternberg: Couple-Stress and Singular Stress Concentrations in Elastic

Solids. H . Neuber: On the Effect of Stress Concentrations in Cosserat Continua. S. Kessel: Stress Functions and Singularities for the Infinite Extended,

Linear Elastic-Isotropic Cosserat Continuum. P. P. Teodorescu: On the Action of Concentrated Loads in the Case of a

Cosserat Continuum. F. Kroupa: Dilatation Lines. A. C. Eringen: Mechanics of Micromorphic Continua. G. Adomeit: Determination of Elastic Constants of a Generalized Cos-

serat Continuum. S.C. Cowin: The Characteristic Length of a Polar Fluid. N. Fox: On Plastic Strain. M. Satake: Mechanics of Granular Media. R. Stojanovic: Dislocations in the Generalized Elastic Cosserat Con-

tinuum.

Thursday, August 31:

I. A. Kunin: Theory of Elastic Media with Microstructure and Theory of Dislocations.

H . Zorski: Statistical Theory of Dislocations. T. Mura: Continuum Theory of Dislocations and Plasticity. W. Noll: Inhomogeneities and Dislocations in Materially Uniform Simple

Bodies. C. Wang: On the Geometric Structure of Simple Bodies, a Mathematical

Foundation for the Theory of Continuous Distributions of Dis-locations.

Friday, September 1:

L. I. Sedov and V. L. Berdytchevsky: Dynamical Equations in the Theory of Continual Dislocations.

REPORT 1967 45

K. Kondo: On the Two Main Currents of the Geometrical Theory of Imperfect Continua.

R. de Wit: Differential Geometry of the Nonlinear Continuum Theory of Dislocations.

H. Gunther: Some remarks about High Velocity Dislocations. ]. Krumhansl: Microscopic Considerations from Solid State Physics and

Macroscopic Continuum Limits. R. Bullough and R. C. Perrin: Properties of Dislocations in Iron - Im-

portance of the Discrete Nature of the Crystal Lattice. C. Teodosiu: Micro-structure in the Continuum Theory of Dislocations. S. Minagawa and S. Amari: On the Dual Yielding and Related Problems. Z. Wesolowski and A. Seeger: The Application of a "Universal" Solution

for Isotropic Incompressible Materials to Screw-Dislocations. K. Anthony, U. Essmann, A. Seeger, H. Trauble: Volterra's Dislocations

of the Second Kind (Disclinations) and the Cosserat Continuum with Incompatible Rotations.

R. S. Mindlin: Theories of Elastic Continua and Crystal Lattice Theories. W. L. Indenbom and A. N. Orlov: Physical Foundations of Dislocation

Theory. E. Kroner: Interrelations between Various Branches of Continuum Mech-

amcs.

Saturday, September 2:

M. 0. Tucker and A. G. Crocker: The Plane Boundary m Anisotropic Elasticity.

]. B. Alblas: The Cosserat Continuum with Electronic Spin. F. Hehl: Space-Time as Generalized Cosserat Continuum. ]. A. Brinkman: A Modernization of MacCullagh's Ether Theory.

E. Kroner (Chairman)

K. The Second IUT AM Symposium on the Theory of Thin Shells

The Symposium was held at the Technical University of Denmark, Copenhagen, on the Lyngby Campus from 5th to 9th September 1967. The Scientific Committee consisted of the following members:

Prof. A. E. Green, Newcastle upon Tyne Prof. W. T. Koiter, Delft Prof. F. I. Niordson, Copenhagen, Chairman Prof. W. Olszak, Warsaw Prof. E. Reissner, Cambridge, Mass. Prof. I. N. Vekua, Tbilisi


The local arrangements of the Symposium were in the hands of the Local Organizing Committee with Prof. F. I. Niordson as chairman.

Participants were invited personally for their active interest in any of fields covered by the Symposium and the participation was strictly

hm1ted. There were 75 participants from 15 countries. Financial support was provided by several Danish companies.

The impetus to the advancement of shell theory from the first IUTAM Symposium on this subject, held in Delft in 1959, has been widely recog-nized. The purpose of this second Symposium was to take stock of the situation and, by bringing leading scientists in this field together, to open and encourage new studies in this seemingly inexhaustible discipline.

It was felt that, in the development following the first Symposium in Delft, solid foundations of shell theory had been obtained and that this second Symposium could be devoted almost entirely to the buckling and post-buckling behaviour and to the non-linear theory of shells. However, as it proved to be, nearly half the lecturers were mainly concerned with the foundations of shell theory and the discussions indicated that more will be said in this matter. Nevertheless, the scientific value of this Sym-posium will certainly to a great extent also be the result of the sessions devoted to stability and non-linear behaviour.

In the Symposium 23 papers were presented, in many cases followed by lively and fruitful discussions.

The scientific program was as follows:

Session 1 (Chairman: B. Budiansky) F. John: Refined Interior Shell Equations E. Reissner: On the Foundation of Generalized Linear Shell Theory

Session 2 (Chairman: W. Flugge) W. Gunther: Topologische Fragen in der Schalentheorie A. L. Gol'denweizer: Problems in the Rigorous Deduction of the Theory

of Thin Elastic Shells

Session 3 (Chairman: N.]. Hoff) A. E. Green and P . M. Naghdi: Shells in the Light of Generalized Con-

tinua I. N. Vekua: On a Complement to the Theory of Shells

Session 4 (Chairman: A. E. Green) M. Sh. Mikeladze: Purposes and Problems of the Technical Theory of

Thin Plastic Shells

REPORT 1967 47

W. T. Koiter: Foundations and Basic Equations of Shell Theory. A Survey of Recent Progress

M. Misicu: A Theory of Thin Shells with Elastic Coupling Effects and some Applications

H. S. Rutten: Asymptotic Approximation in the Three-Dimensional Theory of Thin and Thick Elastic Shells

Session 5 (Chairman: I. N. Vekua)

]. Sanders: On the Shell Equations in Complex Form S. Lukasiewicz: On the Optimum Design of Shells Loaded by Concen-

trated Forces

Session 6 (Chairman:]. L. Sanders)

W. Nachbar: Finite Deformation of Membranes and Shells under Local-ized Loading

B. Budiansky : Post-Buckling Behaviour of Cylinders in Torsion ]. Singer: The Influence of Stiffener Geometry and Spacing on the

Buckling of Axially Compressed Cylindrical and Conical Shells W. Thielemann and M. Esslinger: Determination of Post-Buckling States

of Equilibrium and Their Stability for Thin-Walled Circular Cylin-ders of Finite Length

Session 7 (Chairman: E. Reissner)

A. V. Pogorelov: Some New Methods in the Non-Linear Theory of Shells A. Kildegaard: Bending of a Cylindrical Shell Subject to Axial Loading

Session 8 (Chairman: F. K. G. Odqvist)

S. A. Ambartsumyan: The Theory of Symmetrically Loaded Shells of Revolution, Made of Different-Modulus Material

A. Sawczuk: On Incremental Collapse of Shells Z. Bychawski and W. Olszak: Rheological States of Geometrically Non-

Linear Rotational Membranes F. A. Leckie: Plastic Instability of Spherical Shells M. K. Duszek: Plastic Analysis of Shallow Spherical Shells at Moderately

Large Deflections.

The Proceedings of this Symposium will be published by the Springer-Verlag, Berlin.

F. I. Niordson (Chairman)


L. IUTAM Symposium on the Behaviour of Dense Media under High Dynamic Pressures

This symposium is one of a series of biennial meetings organized up to now by national organizations (1961 - Gif-sur-Yvette in France; 1963 -London; 1965 -Silver Spring, Maryland, USA). During the JUT AM General Assembly on the 25th of June 1966 in Vienna, Professor Roy suggested to hold an international symposium on the behaviour of dense media under high dynamic pressures.

This symposium was held in Paris from the 11th to the 15th 1967 at the International Railways Union headquarters. The Screntdic Committee, approved by the Bureau of IUTAM, was composed of the following members:

Prof. M. Roy, President of JUT AM (Chairman), Paris Dr. J. Berger, Commissariat a l'Energie Atomique, Paris Prof. P. Bowden, Cambridge University, Great Britain Prof. B. Broberg, Lund Institute of Technology, Sweden Prof. S. Fukui, Tokyo University, Japan Prof. M.A. Lavrentiev, Novosibirsk, USSR Dr. R . Schall, Germany Prof. M. L. Williams, Utah University, USA (Prof. Fukui has not been able to attend the conference.) The symposium had been announced to all interested investigators so

that they might submit communication summaries. The Scientific Com-mittee had to choose among 125 proposals those which best corresponded by their quality and subject to the goals of the symposium. It was to retain about twenty "long" communications (10 pages text, 30 mmutes of presentation) and about forty "short" communications (5 pages, 15 minutes of presentation). It seemed difficult to reduce further the number of papers without taking a risk of committing some injustices. Moreover the Scientific Committee felt that the quality of contributions was on an excellent level.

Consequently, we had a very heavy program. The texts of. com-munications were sent to participants one month before the openmg of the Symposium. 186 persons coming from 12 different nations attended the conference.

This Symposium has been generously and totally financed by the "Commissariat a l'Energie Atomique" (France). Subsidies were granted to a certain number of American and Russian participants to help them pay their travelling expenses.

The subjects covered during the Symposium can be classified under the following titles:

REPORT 1967 49

1. Shock and detonation waves in dense media a) Structure; microscopic physical mechanisms implied in these trans-

formations. b) Shock-induced phase transitions and changes. c) State equations. d) Electromagnetic and electric phenomena associated to these specific

flows.

2. Mechanical behaviour of dense media in shock-induced flows in the field of dynamic hyperpressures. The stress has been laid on the study of fundamental phenomena

rather than on technical applications. It appears clearly that the field of high dynamic pressures develops

rapidly in many directions and that the interest of investigators shifts notably from purely mechanical aspects to the physical and even chemical implications of the observed phenomena. The program perfectly reflects the present points of interest.

A cocktail given at the Pre Catelan in Paris gave the participants the opportunity of meeting in a very pleasant and countryside-like environ-ment at the end of the first day of the symposium. A banquet gathered them once more at the Hotel George V (Paris) on the 13th of September. These gatherings made it much easier for the participants to come into closer contact with one another and exchange ideas and information.

The Records of the Symposium will be published by the Dunod pub-lishing house (Paris) and will probably be distributed before next summer.

The scientific program was as follows:

September 11, Monday morning (Chairmen: P. Bow den and M. Roy)

W. Fickett and W. C. Davis: Theories of Detonation R. Cheret: Theorie de !'explosion de revolution et permanente Francis ]. Petrone: A theoretical investigation of the validity of the

classical detonation wave structure A. Persson and P. A. Persson: Measurement of detonation pressures in

condensed explosives at low and high initial densities G. Verdes, F. David, F. Prouteau and M. Dufresne: Ecoulement des gaz

brules derriere l'onde de detonation d'une cartouche cylindrique I. C. Skidmore: Computer studies of shock initiation in homogeneous and

heterogeneous explosives H. Bernier, ]. M. Lezaud and Y. Chavalier: Etude experimentale et

theorique de la generation de la detonation par onde de choc dans un explosif granulaire

'


R. Cheret,]. M. Lezaud and L. Bonnet: Etude experimentale de la gene-ration d'une explosion dans des penthrites granulaires soumises a un choc plan

September 11, Monday afternoon (Chairmen: George E. Duvall and B. Vodar)

R. G. McQueen, S. P. Marsh and W.]. Carter: The determination of new standards for shock-wave equation of state work

Jerry Wackerle, W. L. Seitz and John C. Jamieson: Shock-wave equation of state for high-density oxygen

B. J. Alder: An interpretation of experimentally determined Hugoniots for argon, xenon and potassium chloride

D. H. Tsai and C. W. Beckett: Shock wave propagation in a two-dimensional crystalline lattice

P. G. Parish: A Grtineisen equation of state for copper D. J. Pastine: A simplified theory of anharmonic contributions to the

thermodynamic properties of metals R. Gasnier: Equation d'etat semi-empirique des metaux

September 12, Tuesday morning (Chairmen: R. E. Duff and H. Bernier)

P. W. Wright, G. Eden and B. D. Lambourn: Behaviour of various mate-rials under multiple shocking

P. Laharrague, ]. Morvan and ]. Thouvenin: Refraction d'une onde de choc

J. Leygonie and ]. Cl. Bergon: Determination de la valeur du coefficient de Grtineisen en fonction du volume specifique par !'etude du pheno-mene de reflexion de Mach

J.P. Argous and]. Aveille: Adiabatique dynamique du cuivre a pression elevee

W. M. Isbell: Use of a light-gas gun for the measurement of Hugoniot equation of state and release wave characteristics of materials at extreme pressures

A. Rauch: Determination de la celerite des ondes de detente dans l'alliage AU4G

F. David and G. Verdes: Mesure de la celerite du son sur l'hugoniot de !'aluminium par la methode des chocs obliques stationnaires

September 12, Tuesday afternoon (Chairmen: M. L. Williams and ]. Thouvenin)

R. G. McQueen and S. P. Marsh: Hugoniots of graphites of various initial densities and the equation of state of carbon

REPORT 1967 51

J. 0. Johnson and J. Wackerle: Shock wave compression of porous mag-nesium and ammonium sulfate

]. F. Heyda: An equation of state for solids based on a modified plate gap model

Ichiro Ito and Makoto Terada: Stress waves and dynamic characteristics of rocks under detonator's attack

B. M. Butcher: Spallation in 6061-T6 Aluminium ]. Vacellier, J. Legrand and G. Verdes: Conditions d'ecaillage de

!'uranium et d'un alliage d'uranium JohnS. Rinehart: Morphology and trajectories of fractures generated by

intersecting impulsive stress waves

September 13, Wednesday morning (Chairmen: B. Broberg and L. De/fet)

Mark L. Wilkins: La resistance dynamique d'un materiau ]. Zarka: Sur la viscoplasticite des metaux D. Verney: Evaluation de la limite elastique et de l'energie d'ecoulement

plastique d'un metal par des experiences d'implosion « lente )) James L. Rand and John W. Jackson: The split Hopkins pressure bar Kozo Kawata, S. Fukui, ]. Seino and N. Takada: Some analytical and

experimental investigations on high velocity elongation of sheet mate-rials by tensile shock

Thomas]. Ahrens and Ronald K. Linde: The response of brittle solids to shock compression

September 13, Wednesday afternoon (Chairmen: C. D. Lundergan and C. Fauquignon)

F. E. van Wely: Influence of shock waves on the structure of metals A. Deribas, M. Mogilevsky and T. Sobolenko: The effect of shock detona-

tion waves on properties of some metals and alloys A. Deribas, F. Matveenkov, T. Sobolenko and T. Teslenko: Investigations

of the changes in the zones of collision by explosive joining of metals Y. Horie and George E. Duvall: Shock induced phase transition in iron E. D. Ruchkin, I. A. Ovsjannikova and S. S. Batsanov: Phase transitions

in solids induced by shock waves V. A. Kirkinsky: The relation of effects of dynamic and static pressures

on the example of oxides of the 4th group elements

September 14, Thursday morning (Chairmen: M. A. Lavrentiev and M. L. Wilkins)

S. S. Batsanov: Physics and chemistry of high dynamic pressure S. S. Batsanov, S. S. Derbenjova, G. S. Doronin and E. V. Dulepov : For-

mation of defects in solids under shock waves


A. Deribas, N. Dobretsov, V. Kudinoff, V. Maly, A. Serebrjakov and A. Staver: Shock-wave compression of some inorganic compositions

G.Boreskov, I.Sazonova, N.Keyer, V.Kjudinov, G.Gridasova, V.Maly and L. Kefely: The influence of the shock pressure on the catalytic properties of the exide semi-conductorcatalysts

September 14, Thursday afternoon (Chairmen: S. f . Jacobs and]. Berger)

R. E. Duff, D. B. Larson, W. H. Gust, E. B. Royce, A. C. Mitchell, R. N. Keeler and W. G. Hoover: Shock-wave studies in condensed media

]. D. Kennedy: Hall effect measurements in shock-loaded semi-conductors E. B. Royce: Shock induced demagnetization of nickel ferrite yttrium,

iron garnet and iron A. Migault and J. Jacquesson: Effets electriques lies au passage d'une

onde de choc dans des jonctions metalliques ]. Crosnier and H. Conze: Effet thermoelectrique anormal sous shoe

intense dans un metal D. V. Keller: Behavior of short duration shocks in plexiglas

September 15, Friday morning (Chairmen: R. Schall and R. F. Williams)

Douglas D. Keough, R. F. Williams and W. Wilkinson: Piezoresistive shock transducers capable of submicrosecond wide dynamic range, stress-time measurements

David Bernstein: Research on manganin stress transducers R. A. Graham and G. E. Ingram: A shock wave stress gauge utilizing the

capacitance change of a solid dielectric disc Lynn M. Barker: Fine structure of compressive and release wave shapes

in Aluminium measured by the velocity interferometer technique H. D. vom Stein, B. Koch and H. ]. Pfeifer: Etudes de phenomenes

d'ecrasement a l'aide d'un interferometre a laser P. ]. King: An infra red method of estimating the residual temperatures

of shocked plates H. Knoepfel: Megagauss fields as a transmitting medium for high pres-

sures

September 15, Friday afternoon (Chairmen: M. F. Scharff and M. M onnet)

Charles D. Godfrey: The high explosive-rocket - A Technique for accelerating plates to high velocities

]. Leygonie and]. Cl. Bergon: Dispositifs generateurs de hautes pressions dynamiques

REPORT 1967 53

R . L. Bjork: The theory and computation of hypervelocity impact effects T. D. Riney: Sensivity of hyper-velocity impact mechanisms to projectile-

plate configurations M. Defourneaux: Guidage et mise en forme d'ondes de detonation le long

de surfaces alternativement explosives et inertes ]. K. Dienes and M. W. Evans: Cratering calculations with a hydro-

dynamic strength code

M. Publications of the Union

a) Annual Reports. Report 1948 Report 1949 Report 1950 Report 1951 Report 1952 Report 1953 Report 1954-1955-1956 Report 1957 Report 1958 Report 1959 Report 1960

no more available

]. Berger (Secretary)

Report 1961 Report 1962 Report 1963

available at the Secretariat

Report 1964 Report 1965 Report 1966 Report 1967

b) Publications on Symposia, etc.: 1. Problems of Cosmical Aerodynamics, Proceedings of the Symposium

on the Motion of Gaseous Masses of Cosmical Dimensions held at Paris, France, August 16-19, 1949, organized by IUTAM and IAU. Published by: Central Air Documents Office, Army-Navy-Air-Force, UB Building, Dayton 2, Ohio, USA. Copies can be obtained from the Secretary, U.S. National Committee on Theoretical and Applied Mechanics, Room 1101, 29 West 39th Street, New York 18, N.Y., USA, and from the secretariat of the Intern. Astronomical Union (address: University Observatory, 0ster Voldgade 3, Copenhagen, Denmark).


2. Colloque international de Mecanique, Pallanza, Lago Maggiore, Italia, 23-24 juin 1950, organise par l'IUTAM. Publie par le Consiglio Nazionale delle Ricerche, Roma, Italia, dans "La Ricerca Scientifica ", annee 20, n° 12, pp. 1917-1942, dk 1950.

3. Colloquium on Plastic Flow and Deformation within the Earth, Hershey, Pennsylvania, USA, September 12-14, 1950, organized by IUTAM and IUGG. Published by the American Geophysical Union in the " Transactions American Geophysical Union", vol. 32, n° 4, pp. 497-543, 1951. A few copies can be obtained from the Secretary, American Geo-physical Union, 1530, P. Street, N. W., Washington, D. C. (USA).

4. Colloque sur les Vibrations Non-Lineaires, tenu a l'He de Porquerol-les, Var, France, 18-21 septembre 1951, organise par l'IUTAM et l'URSI. Publications scientifiques, n° 281, Ministere de l'Air, 4, avenue de Ia Porte-d'Issy, Paris xve (F ranee), 195 3.

5. Colloque Massau, tenu a Bruxelles, Belgique, les 25-29 avril1952, organise par le Comite Massau, avec le concours de l'IUTAM. Asso-ciation des Ingenieurs de Gand, rue de la Victoire, Bruxelles.

6. 2nd Symposium on Gas Dynamics of Interstellar Clouds, Cambridge (UK), 1953, in cooperation with IAU. "Gas Dynamics of Cosmic Clouds, edited by H . C. van de Hulst and J. M. Burgers (IAU Symposium series, n° 2), Amsterdam". Published by North-Holland Publishing Company, Amsterdam (Netherlands), 1953.

7. Colloquium on Photoelasticity and Photoplasticity (Brussels, Bel-gium, 29-31 July 1954). Published by Imprimerie Dioncre, Chaussee de Boondael, 602-602a, Ixelles-Bruxelles (Belgique).

8. Colloquium on Fatigue (Stockholm, Sweden, 25-27 May 1955), organized by IUT AM. Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1956.

9. Colloquium on Deformation and Flow of Solids (Madrid, Spain, 26-30 September 1955), organized by IUTAM. Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1956.

10. Third Symposium on Cosmical Gas Dynamics (Cambridge, Massa-chusetts, USA, 24-29 June 1957, in cooperation with IAU). Published by Reviews of Modern Physics, American Institute of Physics, 335 East 45th Street, New York 17, N.Y. (USA), 1958.

REPORT 1967 55

11. Symposium on Boundary Layer Research (Freiburg i. Br., Germany, 26-29 August 1957). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1958.

12. International Symposium on Atmospheric Diffusion and Air Pollu-tion (Oxford, UK, 24-29 August 1958, in cooperation with IUGG). Published by Academic Press, Inc., 111 Fifth Ave., New York 3, N. Y. (USA), 1959.

13. Symposium on Non-Homogeneity in Elasticity and Plasticity (War-saw, Poland, 2-9 September 1958), organized by IUTAM. Published by Pergamon Press, Ltd, 4 & 5 Fitzroy Square, London W 1 (UK), 1959.

14. Symposium on Fluid Mechanics in the Ionosphere (Ithaca, N .Y., USA, 9-15 July 1959), organized by URSI in cooperation with IUTAM, IUGG and IAU. Published by the American Geophysical Union, 1515 Massachusetts Avenue, N. W., Washington 5, D. C. (USA), in the "Journal of Geophysical Research", Vol. 64 (Dec. 1959), pp. 2037-2041.

15. Symposium on the Theory of Thin Elastic Shells (Delft, Netherlands, 24-28 August 1959), organized by IUTAM. Published by the North-Holland Publishing Company, N. Z. Voor-burgwal68, Amsterdam-C. (Netherlands), 1960.

16. International Symposium on Magnetohydrodynamics (Washington, D. C.- Williamsburg, Virginia, USA, 17-23 January 1960). Published by Reviews of Modern Physics, American Institute of Physics, 335 East 45th Street, New York 17, N.Y. (USA).

17. Colloquium on Creep in Structures (Stanford, California, USA, 11-15 July 1960). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1962.

18. Fourth Symposium on Cosmical Gas Dynamics (Varenna, Italy, 18-30 August 1960, in cooperation with IAU). Published by the Italian Physical Society, in the " Supplemento del Nuovo Cimento", Vol. 22 n. 1, 1961.

19. International Symposium on Fundamental Problems in Turbulence and their Relation with Geophysics (Marseille, France, 4-9 Sep-tember 1961, in cooperation with IUGG). Vol. 67, n° 7 A (American Geophysical Union, 1515 Massachusetts Avenue, N. W., Washing-ton 5, D. C., USA). Published in the "Journal of Geophysical Research", Vol. 67, N° 8 (July 1962), pp. 3003-3235.


20. International Symposium on the Theory of Non-Linear Vibrations (Kiev, USSR, 12-18 September 1961). Published by the Publishing House of Academy of Sciences of the Ukrainian SSR in Kiev (USSR).

21. International Symposium on Second Order Effects in Elasticity, Plasticity and Fluid Dynamics (Haifa, Israel, 21-27 April 1962). Published by Pergamon Press, Ltd, Jerusalem Academic Press, Ltd, Israel, 1964.

22. Symposium sur La Dynamique des Satellites (Paris, France, 28-30 mai 1962). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1963.

23. Symposium on Gyrodynamics (Celerina, Switzerland, 20-23 August 1962). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1963.

24. Symposium Transsonicum (Aachen, Germany, 3-7 September 1962). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1964.

25. Symposium on Stress Waves in Anelastic Solids (Providence, Rhode Island, USA, 3-5 April 1963). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1964.

26. Symposium on Applications of the Theory of Functions in Con-tinuum Mechanics (Tbilisi, USSR, 17-23 September 1963). Proceedings edited by N. I. Muskhelishvili, L. I. Sedov, and G. K. Mikhailov and published under the title "Applications of the Theory of Functions in Continuum Mechanics, Vol. 1 Mechanics of Solids, Vol. 2 Fluid and Gas Mechanics, Mathematical Methods" by " Nauka " Publishing House, Moscow (USSR), 1965.

27. Symposium sur la Rheologie et la Mecanique des Sols (Grenoble, France, 1-8 avril1964). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1966.

28. Symposium on Concentrated Vortex Motions in Fluids (Ann Arbor, Michigan, USA, 6-11 July 1964 ). A brief account by D. Kiichemann of the problems discussed has been published in the" Journal of Fluid Mechanics", Vol. 21, part 1, pp. 1-20 (1965). The survey papers have been published in Vol. 7 of " Progress in Aeronautical Sciences ", 1966.

REPORT 1967 57

29. Symposium on Recent Advances in Linear Vibration Mechanics (Paris, France, 13-15 April1965). Published in "Revue Franyaise de Mecanique" under the title " Recents Progres de la Mecanique des Vibrations Lineaires", N° 13 (1965), pp. 3-58, N ° 14 (1965), pp. 3-70, N ° 15 (1965), pp. 3-105.

30. joint I UT AM I IA U I COS PAR Symposium on the Trajectories of Artificial Celestial Bodies as Determined from Observation (Paris, France, 20-23 April1965). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmers-dorf, West Berlin (Germany), 1966.

31. Vth j oint IAUIIUTAM Symposium on Cosmical Gas Dynamics (Nice, France, 2-15 September 1965). Published under the title "Aerodynamic Phenomena in Stellar Atmo-spheres" (IAU Symposium series, No. 28), editor R. N. Thomas. Academic Press, London and New York, 1967.

32. I UTA M Symposium on Rotating Fluid Systems (La Jolla, Cali-fornia, USA, 28 March- 1 April1966). A Report on this Symposium has been published by F. P. Bretherton, G. F. Carrier, and M.S. Longuet-Higgins under the title "Report on the I.U.T.A.M. symposium on rotating fluid systems " in the" Journal of Fluid Mechanics", Vol. 26, part 2, pp. 393-410 (1966).

33.I UT AM Symposium on Irreversible Aspects of Continuum Mechan-ics (Vienna, Austria, 22-25 June 1966). The Proceedings of this Symposium, edited by H. Parkus and L. I. Sedov, will be published together with the Proceedings of the Sym-posium listed under No. 34 by Springer-Verlag, Vienna and New York.

34. I UTA M Symposium on the Transfer of Physical Characteristics in Moving Fluids (Vienna, Austria, 27-28 June 1966). The Proceedings of this Symposium, edited by H. Parkus and L. I. Sedov, will be published together with the Proceedings of the Sym-posium listed under No. 33 by Springer-Verlag, Vienna and New York.

35. joint I U G G I I UTA M Symposium on Boundary Layers and Turbu-lence Including Geophysical Applications (Kyoto, Japan, 19-24 September 1966 ). The Proceedings of the Symposium, edited by F. K. Bowden, F. N . Frenkiel, and I. Tani have been published in "The Physics of Fluids, Supplement 1967", Vol. 10, 9, Part II, pp. 3-321 (1967).

36.I UTA M Symposium on the Generalized Cosserat Continuum and the Continuum Theory of Dislocations with Applications (Stuttgart and Freudenstadt, Germany, 28 August - 2 September 1967). The Proceedings of the Symposium, edited by E. Kroner, will be published by Springer-Verlag, Berlin.

'


37. Second I UTA M Symposium on the Theory of Thin Shells (Copen-hagen, Denmark, 5-9 September 1967). The Proceedings of the Symposium, edited by F. I. Niordson, will be published by Springer-Verlag, Berlin.

38. I UTA M Symposium on the Behaviour of Dense Media under High Dynamic Pressures (Paris, France, 11-15 September 1967). The Proceedings of the Symposium, edited by J. Berger, will be published by Dunod, Paris.

c) Proceedings of the International Congresses for Applied Mechanics.

Until September 4, 1964 the organization of the International Con-gresses for Applied Mechanics was supervised by the " International Committee for the Congresses of Applied Mechanics " and for each Con-gress separately entrusted to a local Organizing Committee undertaking also the publication of the Proceedings. Consequently, there is no central point from which Proceedings can be ordered, and for each volume, application must be made to the publishers who took care of that partic-ular volume.

Since September 4, 1964 the same task will be fulfilled by the Stand-ing Congress Committee of IUTAM, and local Organizing Committees to be established.

The titles of the volumes and the names of the publishing firms are given below.

1st Congress, Delft (Netherlands), 22-26 April1924. Proceedings of the First International Congress for Applied Mechan-ics, Delft 1924, edited by C. B. Biezeno and J.-M. Burgers (one vol.). Technische Boekhandel en Drukkerij J. Waltman Jr., Delft, 1925. No more copies are available for sale at Delft.

2nd Congress, Zurich (Switzerland), 12-17 September 1926. Verhandlungen- Comptes rendus- Proceedings of the 2nd Inter-national Congress for Applied Mechanics, Zurich, 12-17 Septem-ber 1926, herausgegeben von E. Meissner (one vol.). Orell Fiissli Verlag, Ziirich und Leipzig, 1927.

Jrd Congress, Stockholm (Sweden), 24-29 August 1930. V erhandl ungen - Proceedings of the 3 rd Intern a tiona! Congress for Applied Mechanics - Comptes rendus, herausgegeben von A. C. W. Oseen und W. Weibull (3 vol.). AB. Severiges Litografiska Tryckerier, Stockholm, 1931.

REPORT 1967 59

4th Congress, Cambridge (UK), 3-9 July 1934. Proceedings of the Fourth International Congress for Applied Me-chanics, Cambridge, UK, July 3rd-9th, 1934 (one vol.). University Press, Cambridge (UK), 1935.

5th Congress, Cambridge (Massachusetts, USA), 12-16 September 1938. Proceedings of the Fifth International Congress for Applied Mechan-ics, held at Harvard University and the Massachusetts Institute of Technology, Cambridge, Massachusetts, September 12-16, 1 edited by J.P. den Hartog and H. Peters (one vol.). John W1ley and Sons, Inc., New York (USA), and Chapman and Hall Ltd, London (UK), 1939.

6th Congress, Paris (France), 22-29 September 1946. Proceedings not published (was given in the hands of Gauthier-Villars, Paris).

7th Congress, London (UK), 5-11 September 1948. Proceedings of the Seventh International Congress for Applied Mechanics, 1948, published by the Organizing Committee (Intro-duction, Vol. I, Vol. II- Parts 1 and 2, Vol. III, Vol. IV). Copies can be obtained on application from the Secretary of the Congress Committee, Prof. W. T. Koiter, Mekelweg 2, Delft (Nether-lands).

8th Congress, Istanbul (Turkey), 20-28 August 1952. Proceedings published by the Organizing Committee (Vol. I, Vol. II). Faculty of Sciences, University of Istanbul, P. 0. Box 245, Istanbul (Turkey), 1953. Copies can be obtained on application from the Secretary of the Congress Committee, Prof. W. T. Koiter, Mekelweg 2, Delft (Nether-lands).

9th Congress, Brussels (Belgium), 5-13 September 1956. Proceedings published by the Organizing Committee (Vol. I to Vol. VIII). Free University of Brussels, 50, avenue Franklin-Roosevelt, Brussels (Belgium), 1957.

10th Congress, Stresa (Italy), 31 August-7 September 1960. Proceedings published by the Consiglio Nazionale delle Ricerche, Piazelle delle Science 7, Roma (Italia), printed by Elzevier Publish-ing Company, Amsterdam- New York, 1962.

11th Congress, Munich (Germany), 30 August-S September 1964. Proceedings edited by H. Gorder and published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1966.