It’s a Free, Free WorldIt’s a Free, Free World

What You Can Find on What You Can Find on www.www.pragticpragtic..comcom

aand How to Use Itnd How to Use It

Jan PapugaJan Papuga

Czech Technical University in Prague

Dept. of Mechanics, Biomechanics and Mechatronics

Workshop on Computational Fatigue Analysis 2008 & 2ndWorkshop on Computational Fatigue Analysis 2008 & 2nd PragTic PragTic UsersUsers’ Meeting’ MeetingKamenice nad Lipou, Czech Rep., Oct. 29-31, 2008Kamenice nad Lipou, Czech Rep., Oct. 29-31, 2008

1. PragTic Freeware

Screen PrintScreen Print of of www.pragtic.comwww.pragtic.com

3. Fatigue Lounge

2. FatLim Database

4. PragTicA Project

Switch between CZech and ENglish languages(not enabled on every page, English preferred)

Basic InterfaceBasic Interface

Username of the user if currently logged in

Access to the login/logout script, search for a lost password

HOT NEWS section for getting a quick information on the most important changes on the website

Notification SystemNotification System For registered For registered usersusers ( (anonymousanonymous//privilegedprivileged), which are ), which are

currently logged incurrently logged in Once accepted, a notification on the chosen items within a Once accepted, a notification on the chosen items within a

selected group are send to the user’s e-mailselected group are send to the user’s e-mail Currently enabled for:Currently enabled for:

ConferencesConferences New releases of PragTicNew releases of PragTic Bug reporting systemBug reporting system NewsNews

Planned to be enabled Planned to be enabled

for:for: Material databaseMaterial database Database of Database of

experimentsexperiments Database of prediction Database of prediction

resultsresults Forum itemsForum items

Access through:Access through: User Profile and Your preferences button at the bottom - User Profile and Your preferences button at the bottom -

all available items are offered for selectionall available items are offered for selection Individual items can be selected on their respective sites Individual items can be selected on their respective sites

(when logged in)(when logged in)

Users’ Access LevelsUsers’ Access Levels

group what who can...

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view the most of pages X X X X X Xattend the user meeting X X X X Xdownload Help to PragTic X X X X X Xdownload PragTic X X X Xvisit Forum X X Xwrite to Forum X X Xregulate Forum X Xview content of databases X X X X X Xadd items to databases X X Xedit items in databases as their manager X X Xedit any items Xdelete items in databases X

PragTic

Forum

Databases

1. PragTic Freeware1. PragTic Freeware

Why I amWhy I am doing that doing that (Concept)(Concept) Download (PragTic SW)Download (PragTic SW) Online Help (PragTic SW)Online Help (PragTic SW) Contact to my person (Author)Contact to my person (Author) FAQsFAQs BugsBugs}To be consulted before every

important calculation

Reporting of Bugs in PragTicReporting of Bugs in PragTic Any registered (and logged in) user can report Any registered (and logged in) user can report

bugs he finds in PragTicbugs he finds in PragTic

What the user / reporter inputsWhat I input

Scale of bugs severity Scale of bugs severity Minor – interface, or simple bypassMinor – interface, or simple bypass Medium – clear manifestation, but can affect the resultsMedium – clear manifestation, but can affect the results Substantial – unclear manifestation, affecting the results, Substantial – unclear manifestation, affecting the results,

there is bypass waythere is bypass way Critical – no easy way around and heavy impact on the Critical – no easy way around and heavy impact on the

resultsresults

22. . FatLim DatabaseFatLim Database Why I amWhy I am doing that doing that (Concept)(Concept)

Set of databasesSet of databases FatLim DB, References, FatLim DB, References,

Material DBMaterial DB))

Explanation of some keywords (Glossary)Explanation of some keywords (Glossary)

FatLim DB Limits Experiments related to multiaxial fatigue Experiments related to multiaxial fatigue

limitslimits Load types – harmonic or staticLoad types – harmonic or static Specimens types – smooth, unnotchedSpecimens types – smooth, unnotched

Reasons for Reasons for FatLimFatLim Internet Internet DatabaseDatabase

1.1. proof of aproof of a suitability of my own method (see Int J Fatigue suitability of my own method (see Int J Fatigue

1/2008)1/2008)

2.2. ensuringensuring that only verified error-free experimental data that only verified error-free experimental data areare

usedused

3.3. comparingcomparing different existing methods and sort them different existing methods and sort them

according to their results in different categoriesaccording to their results in different categories

4.4. providingproviding a tool, which would tell what quality of results a tool, which would tell what quality of results

you can expect for your type of loadingyou can expect for your type of loading and the material and the material

usedused

5.5. overcoming problematic points noted in the next slidesovercoming problematic points noted in the next slides

Common pCommon problems – “Soft” roblems – “Soft” DataData

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Experimenty: NKh, NKm, NKc (data Nishihara & Kaw amoto - celkem 40 exp.)Kritérium: Findley

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Experimenty: kompletní současná FatLim databáze (celkem 428 exp.)Kritérium: Findley

Evolution rule I:Evolution rule I: The sets of experiments which The sets of experiments which “meet wishes” of the methods are preferred“meet wishes” of the methods are preferred

Common ProblCommon Problemsems – – „„SoftenedSoftened“ “ DDataata

NINIC, D.; STARK, H. L.: A multiaxial fatigue damage function. Int. Journal of Fatigue 29, 2007, pp. 533-548.

FINDLEY, W.N.: Combined-stress fatigue strength of 76S-T61 aluminum alloy with superimposed mean stresses and corrections for yielding. NACA Technical Note 2924, May 1953.

Case Remark a [MPa]

m [MPa] a [MPa]

m [MPa] deg FI

FI801 PB 157,9 82,8 0,0 0,0 0 12,0%FI802 PB 143,4 206,9 0,0 0,0 0 28,8%FI803 PB 138,6 310,3 0,0 0,0 0 43,4%FI804 PB 131,0 448,3 0,0 0,0 0 58,3%FI805 PB+To 161,4 0,0 33,4 0,0 0 -0,5%FI806 PB+To 124,8 0,0 62,4 0,0 0 -7,2%FI807 PB+To 124,1 82,8 62,1 41,4 0 11,2%FI808 PB+To 115,2 206,9 57,6 103,4 0 33,6%FI809 PB+To 103,4 310,3 51,7 155,2 0 43,5%FI810 PB+To 102,8 0,0 75,2 0,0 0 -8,7%FI811 PB+To 79,4 0,0 95,9 0,0 0 -0,9%

Case Remark a [MPa]

m [MPa] a [MPa]

m [MPa] deg FI

FI801 PB 157,9 82,8 0,0 0,0 0 12,0%FI802 PB 143,4 206,9 0,0 0,0 0 28,8%FI803 PB 138,6 310,3 0,0 0,0 0 43,4%FI804 PB 131,0 448,3 0,0 0,0 0 58,3%FI805 PB+To 161,4 0,0 33,4 0,0 0 -0,5%FI806 PB+To 124,8 0,0 62,4 0,0 0 -7,2%FI807 PB+To 124,1 82,8 62,1 41,4 0 11,2%FI808 PB+To 115,2 206,9 57,6 103,4 0 33,6%FI809 PB+To 103,4 310,3 51,7 155,2 0 43,5%FI810 PB+To 102,8 0,0 75,2 0,0 0 -8,7%FI811 PB+To 79,4 0,0 95,9 0,0 0 -0,9%

Evolution rule II: Evolution rule II: If some experiment in the set of If some experiment in the set of experiments does not suit you, remove it.experiments does not suit you, remove it.

Often reproduction of data from secondary sources prevents Often reproduction of data from secondary sources prevents detection of such cases and also hides the originator of the detection of such cases and also hides the originator of the softeningsoftening

Common ProblCommon Probleemmss – – IntersectionIntersection Great number of various methodsGreat number of various methods

If a new criterion is introduced, the results If a new criterion is introduced, the results reported are forreported are for:: the new criterionthe new criterion only several older methods (less adequate, only several older methods (less adequate,

simple to compute)simple to compute) The comparison among newer methods is missingThe comparison among newer methods is missing

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Banvillet et al. (IJF 2003) X X X XCarpinteri & Spagnoli (IJF 2001) X X XGoncalves et al. (IJF 2005) X X XLiu & Mahadevan (IJF 2005) X X XPapadopoulos et al. (IJF 1997) X X X X XNinic & Stark (IJF 2007) X X XZenner et al. (IJF 2001) XBernasconi et al. (IJF 2006) X X X

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Banvillet et al. (IJF 2003) X X X XCarpinteri & Spagnoli (IJF 2001) X X XGoncalves et al. (IJF 2005) X X XLiu & Mahadevan (IJF 2005) X X XPapadopoulos et al. (IJF 1997) X X X X XNinic & Stark (IJF 2007) X X XZenner et al. (IJF 2001) XBernasconi et al. (IJF 2006) X X Xpořadí v úspěšnosti ve FatLim 6 12 9 5 4 7 8 14 1 3 11 2 13 10 *)

*) Ranking of the method’s overall results in FatLim

Problems – Publishing of Problems – Publishing of Research ResultsResearch Results

Due to limited allowable scope, a common Due to limited allowable scope, a common

research paper can be published only in two waysresearch paper can be published only in two ways Complete description of results for a small Complete description of results for a small

experimental setexperimental set An overall conclusion of results without An overall conclusion of results without

detailed datadetailed data

publikace počet experimentů detailyBanvillet et al. (IJF 2003) 38 anoCarpinteri & Spagnoli (IJF 2001) 30 anoGoncalves et al. (IJF 2005) 41 anoLiu & Mahadevan (IJF 2005) 57 nePapadopoulos et al. (IJF 1997) 43 anoNinic & Stark (IJF 2007) 108 anoZenner et al. (IJF 2001) 179 ne

Paper Number of experiments Details

CZ ~ EN-------------ano ~ yesne ~ no

FatLim - FatLim - SelectorSelector At presentAt present::

443737

experimentexperimentss

18 18 calculation calculation

methodsmethods

Statistic Statistic

evaluation is evaluation is

prepared prepared

automatically automatically

for data for data

chosen in the chosen in the

selectorselector

New Experiments to New Experiments to FatLim?FatLim?

1.1. Change your profile to the privileged user if you Change your profile to the privileged user if you

have been the anonymous user up to now (have been the anonymous user up to now (Edit Edit

ProfileProfile))

2.2. Add all new authors (Add all new authors (ReferencesReferences))

3.3. Add new proceedings or journal (Add new proceedings or journal (ReferencesReferences))

4.4. Add the paper itself (Add the paper itself (ReferencesReferences))

5.5. Add the material data (Add the material data (Material DBMaterial DB))

6.6. Add the experimental load data (Add the experimental load data (FatLim DBFatLim DB))

7.7. Add the result data to the experiments (Add the result data to the experiments (FatLim FatLim

DBDB))

Databases, to Which Users Databases, to Which Users Can InputCan Input

Bugs (-> PragTic Freeware Project)Bugs (-> PragTic Freeware Project) Users (-> Fatigue Lounge)Users (-> Fatigue Lounge) Conferences (-> Fatigue Lounge)Conferences (-> Fatigue Lounge) References (-> Database of Fatigue Limits)References (-> Database of Fatigue Limits)

AuthorsAuthors PapersPapers ProceedingsProceedings JournalsJournals

Material DB (-> Database of Fatigue Limits)Material DB (-> Database of Fatigue Limits) FatLim DB (-> Database of Fatigue Limits)FatLim DB (-> Database of Fatigue Limits)

fatigue experiments at fatigue limitsfatigue experiments at fatigue limits corresponding prediction resultscorresponding prediction results

Forum (-> Fatigue Lounge)Forum (-> Fatigue Lounge)

User InputsUser Inputs The databases allow input of own data to registered users The databases allow input of own data to registered users How to ensure How to ensure credibility of presented data?credibility of presented data?

SignSign of the registered users of the registered users ManagerManager function function

Once you add some data, you are the responsible one to take Once you add some data, you are the responsible one to take care of themcare of them

Only the manager or administrator can revise thOnly the manager or administrator can revise this particularis particular datadata

If you want to If you want to revise the data of another managerrevise the data of another manager Write the revise proposalWrite the revise proposal It is documented, the manager is informedIt is documented, the manager is informed The The manager has a 30-day time limitmanager has a 30-day time limit, in which he has to accept , in which he has to accept

or decline the proposalor decline the proposal If the proposal is declined, the proposer still can write to If the proposal is declined, the proposer still can write to the the

ForumForum If the manager does not do anything, the new proposal rewrites If the manager does not do anything, the new proposal rewrites

the original data and the proposer becomes its managerthe original data and the proposer becomes its managerPrepared feature

User InputsUser InputsBasic Common InterfaceBasic Common Interface

Report on the fact who is the Manager of the itemReport on the fact who is the Manager of the item

EE button – edit the data (visible to Manager only) button – edit the data (visible to Manager only)

SS button – sign the data (visible to any user logged button – sign the data (visible to any user logged

in)in)

RS RS button – remove your sign (visible to the user button – remove your sign (visible to the user

logged in, who previously signed the item)logged in, who previously signed the item)

DD button – delete the data (visible to Administrator button – delete the data (visible to Administrator

only)only)

Functions and Databases I Functions and Databases I MissMiss

FinLiv – similar to FatLim but extendedFinLiv – similar to FatLim but extended Type of notchType of notch Manufacturing technologyManufacturing technology Number of cyclesNumber of cycles

FatLim and FinLiv extension?FatLim and FinLiv extension? Load path typeLoad path type

Edit system for other people than managersEdit system for other people than managers Notification system for the Forum, Materials Notification system for the Forum, Materials

and FatLimand FatLimHelp Wanted• Work with the databases: I started to build first

databases after two days of study• Search for new data: The material database can be

very helpful to anybody of you, if continuously expanded

3. Fatigue Lounge3. Fatigue Lounge List of users (Users)List of users (Users) Access to your user profile and to your setup Access to your user profile and to your setup

of Notification System items (Edit Profile)of Notification System items (Edit Profile) ForumForum Board with news (News)Board with news (News) Database of conferences (Conferences)Database of conferences (Conferences) Some reading, usable references – ReportsSome reading, usable references – Reports LinksLinks SponsorsSponsors

NewsNews

A database editable by me (administrator) A database editable by me (administrator)

onlyonly

The Notification System activatedThe Notification System activated

If logged in, the news inserted into the If logged in, the news inserted into the

system after your previous last login are system after your previous last login are

shown immediately on the main News shown immediately on the main News

page.page.

ForumForum Enabled for privileged users onlyEnabled for privileged users only Nobody uses it, why? Nobody uses it, why? (I know about people (I know about people

registered to PragTic just to look there)registered to PragTic just to look there)

It is too empty (somebody should start to raise It is too empty (somebody should start to raise

question question ) )

People are not used to ask there (Why? Look People are not used to ask there (Why? Look

on iMechanica.org forum – a minimum interest on iMechanica.org forum – a minimum interest

in fatigue calculations is obvious!)in fatigue calculations is obvious!)

Coupling with e-mail box through Notification Coupling with e-mail box through Notification

system is missingsystem is missing

Inadequate forum topicsInadequate forum topics

ConferencesConferences List of conferences related toList of conferences related to

fatiguefatigue FEM, FEA-post-processingFEM, FEA-post-processing

ImplementedImplemented Notification SystemNotification System Input system available for registered usersInput system available for registered users

Note – the selecting system does not work with IE, Note – the selecting system does not work with IE, only Mozilla/Firefox is fully functionalonly Mozilla/Firefox is fully functional

SS, , RSRS buttons buttons another function hereanother function here user declares that he comes (user declares that he comes (SS) to the conference or decided ) to the conference or decided

not to come (not to come (RSRS))

Help Wanted(I do not know about any other

similarpage related to the central

European region – help me to keep it up-to-date)

4. PragTicA4. PragTicA Project Project((PragTicPragTic in in AApplication)pplication)

Applied Applied to European Commision within FP7 to European Commision within FP7 schemescheme

Consortium of companies and universitiesConsortium of companies and universities Evektor, CZ (PragTic)Evektor, CZ (PragTic) Brno University of Technology, CZ (MSC.Fatigue)Brno University of Technology, CZ (MSC.Fatigue) CDM IT ASCR, CZCDM IT ASCR, CZ Centro Ricerche Fiat, ITCentro Ricerche Fiat, IT CTU in PragueCTU in Prague, CZ (Fe-Safe), CZ (Fe-Safe) Delft University of Technology, NLDelft University of Technology, NL Fatec Engineering, NL (fFatigue)Fatec Engineering, NL (fFatigue) IPM ASCR, CZIPM ASCR, CZ Materials Engineering Research Laboratory, GBMaterials Engineering Research Laboratory, GB SKODA VYZKUM, CZ (FemFat)SKODA VYZKUM, CZ (FemFat) Trinity College Dublin, IRLTrinity College Dublin, IRL University of Parma, ITUniversity of Parma, IT Vision Consulting Automotive, CZ (expected WinLife)Vision Consulting Automotive, CZ (expected WinLife)