Programme : Rubber Technology · Rubber Technologist should be able to understand various aspect of ... Rubber technology RT11 301Mould Design – 3 – Rationale – –

Government Polytechnic Mumbai Rubber technology

RT11 301Mould Design

RATIONALE:

Subject gives insight to Rubber Technician for design of different types of dies used in rubber

moulding and extrusion. Rubber Technologist should be able to understand various aspect of

die design like shrinkage values, material of construction and designing for different moulding

techniques.

OBJECTIVES:

After the end of the course students :-

Should be able to understand various factors considered in design of rubber moulds.

Should be able to design rubber moulds for moulding extrusion.

Programme : Rubber Technology

Course Code : RT 14 301 Course Title : MOULD DESIGN

Prerequisite : Nil C / O : Compulsory

Credits Duration of

Written Examination

Examination Scheme

TH TU PR TOTAL TH TS TH TS PR OR TW TOTAL

1 - 2 3 3hrs -- - - - 50 50 100

( * ) The assessment is internal and external.



Section – I

( 40 Marks )

Topic

No.

Contents Hrs. Marks

1 1. Introduction to Rubber Material

2 2. Behavior of Rubber in mould (Flow Properties).

3

3. Explanation of curing, mould shrinkage-its calculation,

core, cavity, moulding cycle time (Also splitting of

moulding cycle in its elements).

4 4. Introduction of rubber moulding Machines and Processes (

compression, transfer, injection).

5

5. Introduction to detail study of mould construction for d

different moulding process. This will include

a) Feeding of Raw materials to mould

b) Component ejection system.

6

6. Detail designing of mould components

a) core, cavity, moving parts etc.

b) Design of guide pin bushes.

7 7. Compression moulds:

a) Design of positive mould, semi-positive mould

b) Single cavity and multi cavity mould

c) Flash allowance, shrinkage allowance and draft

allowance .

8

8. Transfer moulds:

a) Design of Transfer pot and punch

9 9. Extrusion die design:

Design aspects of

a) Pipe die-Mandrel, Land length, angle of entry

b) Profile die-Elementary study

10 10. Fabrication:

a) Material for mould fabrication. Types of steels to

be used for mould making. Heat treatments for

mould components of mould (core, cavity, guide,

bushes, pins etc.), surface treatment.

b) Machines and machining processes required for



mould making. Lathe, drilling, shaping,

pantograph, spark erosion. Advantages and

limitations of machining processes with reference

to tolerance and surface finish, time, cost etc.

c) Selection of processes.

d) Mould polishing and chrome plating.

11 11. Calculations to find out the mould design and mould

making cost. Costing of mould. Preparation of

mould manufacturing quotations.

Term Work

Assignments 1. From the shrinkage factors given for the rubbers calculate the cavity dimensions for the

given products (e.g. cylinder, tube, and sheet moulded items only) for various rubbers. The data to be provided.

2. Calculate the projected cavity area. (for horizontal projection and vertical projection) and the total volume for the given products (moulded items only).

3. Calculation of the hydraulic pressure for the given moulds for given press of Ram Dia and Platen size.

4. Mould is to be designed for the Injection moulding for the given article. The platen size of the press is 18x18 inch. Arrange the cavities in such a manner that the arrangement is symmetrical and calculate the total runner length for the design.

5. Calculate the speed of extrusion in meters and grams for an given profile and given extruder capacity.

Any other assignment as decided by the faculty.

Drawing Sheets.

1. Detail drawing of a rubber to metal bonded products like Engine mounting/oil seal

2. Drawing of a hand-build component like hose or expansion bellow 3. Drawing of a single cavity compression mould for a simple Rubber

Article 4. Drawing of a mould for a metal to rubber bonded product 5. Drawing of mould for a rubber bellow.

Academic Co-ordinator Programme Co-ordinator Principal

Rubber Tech. Deptt. Rubber Tech. Deptt. Govt. Polytechnic, Mumbai



Rationale: A rubber technologist must have an understanding of physics of raw and vulcanized rubber which include Viscosity, Plasticity, Crystalline and amorphous nature of raw rubbers, solubility, understand stress-strain and other physical properties of vulcanized rubbers. This will help him to understand the principles governing their elastomeric nature and the mechanics of rubber product design.

Objectives:

At the end of the course the student will be able to:-

Understand physical nature of raw rubber.

Understand physical nature of vulcanized rubber.

Conduct laboratory testing of physical properties of raw and vulcanized rubbers

Programme Code : RT

Course Code : RT 14 202 Course Title : Rubber Physics


Credits Duration of Written

Examination Examination Scheme


3 - 2 5 3

hrs 2 Tests of 1 Hour each

80 20 25 - 25 150

( * ) indicates assessment by Internal and External examiners



Section I

(40 Marks)

Table of Contents: Theory Hrs. Marks

Unit 1: Introduction 04 08

1.1 Viscosity, Elasticity, Thermo plasticity.

1.2 Viscoelasticity – Definition, Elastomers, Definition and Criteria for a

Polymer to behave as a elastomer. With example.

1.3 Statistical model of rubber elasticity, radius of gyration, end to end

chain length.

Unit 2: Newtonian and Non Newtonian Fluids 05 12

2.1 Newtonian viscosity-Explanation by parallel plate method.

2.2 Non Newtonian Fluids, Time Dependent and Time

Independent

Fluids-Graphical representation and explanation.

2.3 Linear and Non Linear Viscoelasticity.

2.4 Model of Power Law Fluid.

Unit 3: Solution Properties of Rubbers 09 12

3.1 Concept of Solubility parameter,

3.2 Theta solvent, theta temperature, Thermodynamic of solubility,

Gibb’s free energy .

3.3 Factors affecting swelling of rubber by fluids-solvents, oils etc.

3.4 Viscosity average Molecular Weight:

3.5 Determination of Molecular weight by Intrinsic viscosity method,

Mark Hauwink equation.

Unit 4: Mooney Viscosity of rubbers 06 08

4.1 Principle & working of Mooney Viscometer – Explanation and their

importance.

4.2 Plasticitimeters, PRI, RPN & its importance in NR Industry.

Viscometers & Rheometer.



Section I

Practicals Hrs.

Unit 1: 1. Hardness Testing, Importance in Industry 6

Unit 3: 2.Swelling of rubber in various fluids 4

Unit 4: 3. Mooney Viscosity of different rubbers at different temperatures.

6



Section II (40 marks)


Unit 5: Stress strain properties 05 08

5.1 Stress strain properties of rubber as compared to that of metals

explanation.

5.2 Maxwell and Voigt Model-Creep, Recovery and Stress Relaxation

measurements & importance.

Unit 6: Properties of rubbers 10 17

6.1 Factors affecting properties under Compression, Tension, Hysteresis

with examples. Importance of these properties in Rubber articles.

6.2 Factors affecting Resilience, Tear, Abrasion, Flex & Fatigue

Properties. Permeability in Polymers.

6.3 Electrical properties of Polymers; Dielectric strength and break down

Voltage Creepage.

6.3 Effect of structure & crystallinity on natural rubber and

polychloroprene.

6.4 Dynamic mechanical testing. Frequency dependence of viscoelastic

behavior of Polymers, Heat generation in rubber. Time Temperature

superposition. Bolt/man superposition principle.

Unit 7: Design of components 09 15

7.1 Stiffness, Damping, Shape Factor – Definition.

7.2 Shear and Compression bearings.

7.3 Planer sandwich bearing.

7.4 Laminate bearing, Tube Form bearing and Mounting.

7.5 Vibration and Noise Control.

7.6 Natural frequency of Vibration, Transmissibility, Frequency Ratio, loss

factor, hysterisis.



Section II

Practicals Hrs.

Unit 5: 4. Stress Strain & TEAR properties of vulcanized rubbers 6

Unit 6: 5. Abrasion Properties & Testing

6. Flex Resistance Testing – De-Mattia & Ross Flex

7. Rebound Resilience of rubbers

10

References:

Sr.No. Author Title Publication

1 Treolar The Physics of Rubber ---------

2 IRI Rubber Engineering by Indian Rubber Institute

I.R.I.

3 Prof. B. R. Gupta

Rubber Processing on Two Roll Mill

---------

4 A.L. Gent Rubber Engineering Hanser Publishers, Munich & Vienna

5 Freakley Rubber Engineering Plenum Press


Rubber Tech. Deptt. Rubber Tech. Deptt. Govt. Polytechnic Mumbai



Rationale:

A Rubber technologist must have knowledge of various types of rubbers like Natural

rubber, synthetic rubbers viz. Styrene-butadiene rubber, Poly butadiene rubber, Ethylene-

propylene rubbers, Nitrile rubbers etc., their method of preparation, different grades and their

properties and uses. It will help him to select a rubber for the desired application.

Objectives:

At the end of the course students will be able to:-

Understand different types of rubbers.

Understand their mode of production.

Understand different gradation and their properties and uses.

Programme Code: RT

Course Code: RT 14 201 Course Title : Rubber Chemistry

Prerequisite : SC 11 109 C/O : Compulsory

Credits Duration of Written

Examination Examination Scheme


4 - - 4 3 Hrs 2 Tests of 1 Hour Each

80

20 - - - 100

( * ) indicates assessment by Internal and External examiners



Section I

(40 Marks)


Unit 1: Natural Rubber (NR) 09 12

1.1 Production of NR, Cultivation, Tapping, Concentration, Coagulation.

Sources and Plantation economy, Climatic conditions, Producers, Latex

preservation.

1.2 NR Grade – Pale crepe, Ribbed Smoked Sheets, Technically classified

rubbers, Technically specified rubbers – SMR, ISNR,

( Guvayule, Gutta Percha, Balata ).

1.3 Structure: - Property relationship in NR, strain crystallization, Mastication.

1.4 Advantages, Disadvantages & Applications.

1.5 Blends with other polymers.

Unit 2: Polyisoprene Synthetic (IR) 03 06

Polyisoprene Rubber:-

2.1 Preparation of monomer.

2.2 Manufacturing Process of Polyisoprene.

2.3 Commercial grades, Structure property relationship, Comparison

with NR.



Unit 3: Styrene Butadiene Rubber 06 08

3.1 Preparation of Monomers Styrene & Butadiene.

3.2 Manufacture of SBR, Emulsion Polymerization : Cold & Hot SBR.

3.3 Solution SBR , IISRP nomenclature of SBR, comparison with NR,

comparison of solution and emulsion SBR’s, Structure property

relationship, Commercial Grades.





Unit 4: Polybutadiene Rubber 07 07

4.1 Preparation of monomer. - Butadiene

4.2 Manufacture of polybutadiene, Solution Process, geometrical

isomerism of butadiene polymerisation, commercial grades, different

catalyst used, their comparison with each others.

4.3 Structure Property Relationship.



Unit 5: Nitrile Rubber 07 07

5.1 Preparation of monomers - Butadiene and Vinyl Cyanide.

5.2 Manufacture of NBR ,commercial grades, structure property relationship





Section II

(40 marks)


Unit 6: EPM / EPDM Rubber 06 07

6.1 Preparation of Monomers – Ethylene and propylene.

6.2 Copolymer, terpolymer manufacturer, Structure

Property relationships in EPDM, Unsaturation.


6.4 Metallocene grades, their importance.

6.5 Blends with other rubbers, EPDM – Silicone blend.

Unit 7: Butyl Rubber (IIR) 05 07

7.1 Preparation of Monomers.

7.2 Manufacturing Process of Polyisobutylene Isoprene content.

7.3 Commercial grades, Structure Properties relationship in IIR.

7.4 Derivatives of butyl Rubber- Paramethylene Styrene co-polymer,

Chlorobutyl, Bromobutyl.



Unit 8: Polychloroprene Rubber 06 07

8.1 Preparation, Manufacture of polymer.

8.2 Types of polychloroprene, Sulphur modified adhesive grades.

8.3 Crystallization rate, Commercial Grades, Structure- Properties

relationship, blends.

8.4 Compounding, Vulcanization, Advantages, Disadvantages.

Applications.



References:

Sr. No. Author Title Publication

1 F.W. Billmeyer Text Book of Polymer Science ----------

2 J.A. Brydson Rubber Chemistry & Technology Applied Science Publishers Ltd., London

3 Gowarikar Text Book of Polymer Science New Age International Pvt. Publishers.

4 J.A. Brydson Rubber Materials and Their Compounds

Elsevier Applied Science London & New York.

5 D.C. Blackley Synthetic Rubbers: Their Chemistry and Technology

Applied Science Publishers.


Rubber Tech. Deptt. Rubber Tech. Deptt. Govt. Polytechnic Mumbai

Unit 9: Silicone Rubber 05 07

9.1 Types of Silicon Rubber.

9.2 Silicone family, manufacture structure- Property relationship, Silicone

Rubber

9.3 Compounding materials, Fluorosilicones.

9.4 Advantages, disadvantages & Applications.

Unit 10: Specialty Rubbers 10 12

10.1 Polyacrylic Rubber, Fluorinated Rubber, Chlorinated PE,

Chlorosulphonated PE, Polyurethanes, EVA.

10.2 Grades, Types, properties, Vulcanization & Compounding.

10.3 Special applications, Advantages & Disadvantages.



Rationale:

Thermodynamics is the basic science underlying the energy interaction in any thermal

engineering process. The knowledge of Thermodynamics is essential from the viewpoint of

designs, analysis and operation of various power plants. It also provides the means to utilize the

available

energy in more effective & efficient manner.

The subject under consideration deals with fundamental concepts of thermodynamics

e.g. system, process, path, thermodynamic work, heat enthalpy etc. & their application in

relation with the first law of Thermodynamics.

Properties of steam & related processes are also included which are necessary for the

application in any steam equipments or steam power plant.

Objectives: The student will be able to

Understand the basic concept of thermodynamics.

Explain the importance & application of first & second law of thermodynamics.

Explain ideal gas & steam properties & associated processes

Appreciate the importance of heat transfer principles & their application.

Know various renewable sources of energy & their applications.

Calculate properties of steam by using steam tables

Explain construction & working of boilers, mountings & accessories.

Programme : Mechanical Engineering/ Rubber Tech.

Course Code : ME 14 207 Course Title : Basic Thermodynamics

C / O : Compulsory

Credits Duration of

Written Examination

Examination Scheme


3 - 2 5 3hrs

2 Tests of 1 Hour each

80 20 - - 50 150



Section –I

(40 Marks)

Topic No

Contents

Hrs. Marks

1 Fundamental Concept of Thermodynamics:

1.1 Unit and dimensions, Basic SI Unit, dimensions of various quantities.

1.2 Unit of Force, Pressure, Volume, Temperature, Work, Power (mainly S. I. Unit to be used)

1.3 Macroscopic Vs Microscopic, Thermodynamic system , boundary, surrounding, types of system-open, closed, isolated, Zeroth law of thermodynamics

1.4 Properties and state of system, extensive and intensive properties, properties like specific volume, density, pressure.

1.5 Homogeneous and heterogeneous system, thermodynamic equilibrium, quasi-static process. Net work done by a system, sp. heat and latent heat, path function and point function.

07 12

2 First Law of Thermodynamics :

2.1 First law for closed system undergoing a cycle, first law for closed system undergoing a change of state, energy property of system.

2.2 Different forms of stored energy I) kinetic energy II) potential energy III) Molecular internal, sp. Heat at const. volume, sp.heat at const pressure, energy of an isolated system, perpetual motion machine of first kind.

2.3 First law applied to flow processes-steady flow process, mass balance and energy balance in simple steady flow process.

2.4 Application of first law of Thermodynamics: Steady flow energy equation & its application to open system like,

I) nozzle and diffuser

ii) throttling device

iii) turbine and compressor

iv) heat exchanger(condenser)

10 16

3

Second law of thermodynamics:

3.1 Limitations of first law of thermodynamics. 3.2 Qualitative difference between heat and work, cyclic

heat engine, heat reservoirs. 3.3 Kelvin-Planck and Clausius statements. 3.4 Perpetual motion machine of second kind, reversibility

and irreversibility, conditions for irreversibility. 3.5 Application of second law to heat engine, heat pump and

refrigerator. (No-numerical)

07 12



Section –II

(40 Marks)

4

Ideal Gas & Ideal Gas Processes:

4.1 Definition of an ideal gas, ideal gas laws, Equation of

state or characteristic equation, specific and universal

gas constants, specific heat, enthalpy & Internal energy

of ideal gas.

4.2 Analysis of gas processes assuming const. specific

heats, constant volume process, constant pressure

process, reversible adiabatic processes, polytropic

process, throttling process etc;

4.3 In each case change in internal energy, entropy and

determination of heat, work transfer may be considered

& processes be plotted on P-V & T-S diagrams.

(Numerical Problems)

07 12

5 Heat Transfer :

5.1 Modes of heat transfer: conduction, convection &

radiation.

5.2 Heat transfer by Fourier’s law, thermal conductivity,

conduction through cylinder, thermal resistance,

composite walls, combined conduction & convection.

(Simple Numerical)

5.3 Heat transfer by Radiation: thermal Radiation,

Absorptivity, Transmissivity, Reflectivity, Emissivity,

black and gray bodies, Stefan-Boltzman Law.

07 12

6 Properties of Steam & Vapour Process:

6.1 Formation of steam at constant pressure, wet steam, dry

steam, superheated steam, dryness fraction, sensible

heat, latent heat, enthalpy & entropy of steam, internal

energy of steam, external work done during evaporation,

use of steam tables & numerical problems.

6.2 Various processes for vapour like constant Volume

(Isochoric), const. pressure (Isobaric), Isothermal,

Adiabatic, Polytropic, Throttling.

6.3 Determination of property changes like change in

enthalpy, internal energy, work & heat transfer in each

process, Representation of various processes on P-V, T-

S & H-S planes.

6.4 Determination of dryness fraction of steam using

separating & throttling calorimeter. (Simple Numerical

Problems)

10 16



List of Experiments:

1. Determination of dryness fraction of steam using calorimeter.

2. Calculation of thermal conductivity of a solid metallic rod.

3. Study & compare various heat exchangers such as reactors, evaporators, condensers

etc;

4. Trace and draw the path of flue gases and water-steam circuit with the help of boiler

model.

5. Prepare a report on a visit to sugar factory / Dairy / steam power plant, with

specifications of boiler and list mountings and accessories.

6. MINI PROJECT: Collect data related to energy produced by using conventional and non

conventional energy sources in India and make comparison with practices followed in

developed countries.



RATIONAL:

To be a successful engineer one needs effective performance & effective performance is based

basically on two types of skills, namely technical skills & life skills. Technical skills are essential

in related fields and life skills are useful in one and all fields. Technical skills blended with

creative applications of life skills make the person effective and efficient. In addition to this

understanding of social concepts is also essential.

OBJECTIVES:

This is human science subject intended to develop life skills in context of social & professional

environment to acquire thinking skills, assimilate knowledge, develop self so as to manage or

perform given task successfully.

Programme : Rubber Technology

Course Code : HU 14 105 Course Title : Life Skills


Credits Duration of

Written Examination

Examination Scheme


- - 2 2 3hrs -- - - - 50 - 50



Section- I

( 40 Marks )

Table of Contents: Hours Marks

Unit 1 : Learning 2

1.1 Definition of Learning.

1.2 Basic Concepts

Stimulus

Cognition

Emotional Centre

Response

Feedback

1.3 Model of Learning.

Unit 2 : Memory & Cognition 2

2.1 Basic Concepts

Memory

Storage

Encoding

Retrieval

Components of Memory

Control Process

2.2 Duel store model of memory & its characteristics.



Unit 3 : Study Strategies 6

3.1 Effective Learning & study strategies skills (Covert)

Focussing attention

Maintenance rehearsal

Meaningful learning reflection

Internal organization

Elaborative rehearsal

Visualization.

3.2 Effective overt learning strategies

Effective reading

Effective listening

Effective notes making.

Unit 4 : Thinking Skills. 3

4.1 Definition of thinking.

4.2 Logical & creative thinking.

4.3 Dimensions of creativity.

4.4 Mechanism of creativity process.

4.5 Creative techniques applied to problem solving.

Unit 5 : Introduction to task management.

(using system approach) 3

5.1 Basic concepts like:

Activity

Event

Task

System

Management

Task Management.



Section- II

( 40 Marks )

Table of Contents: Hours Marks

Unit 6 : Self Development. 8

6.1 Areas of self development

Areas of self employment

Self analysis.

6.2 Self Development :- Time

How to plan your time

Time management.

6.3 Self Development :- Stress

Stress physiology

Coping styles

Counteracting stress.

6.4 Self Development:-Emotion

Emotional stability & self control

People skills – influence & collaboration

Emotional intelligent & training.

6.5 Self Development :- Health

Health – food , exercise, rest

Body – observation

Dietary guideline

Addiction.

6.6 Self Development :- Ethics

Basics of ethics

Code of conduct & ethics.

6.7 Self Development :- Motivation

What is motivation

Attitudes and attitude replacements.



Unit 7 : Introduction to Sociology 1

Activity

Event.

Task.

System.

Management.

Task Management.

Unit 8 : Introduction to system approach 1

8.1 Basic system concepts like

Customer

Output

Input a) signal input b) Resource input

Process of conversion

Management

Unit 9 : Social Organization 2

9.1 The meaning of social organization.

9.2 Components of social organization

Status

Roles

Groups-Basic types

Institutions

Societies.

Unit 10 : Social Stratification 2

10.1 Types-Caste, Class, Gender, Age, Ethnicity.

10.2 Aspects of stratifications

Caste & its parameters

Class & its parameters

Effects of stratification on individuals and society

Its equality in modern world

Social mobility & its factors.




Rubber Tech. Deptt. Rubber Tech. Deptt. Govt. Polytechnic, Mumbai

Unit 11 : Social Change 2

11.1 Definition of social change.

11.2 Major factors of change.

11.3 Planned social change

11.4 Futuristic society.

Term Work:

The term work includes the followings.

1. Exercises on learning & thinking skills (Min. 5)

2. Mini Project on task management

3. Written assignments on units III & IV (Min.. 5)

Notes: Workshops/ special lectures may be arranged on self - development



Rationale A mechanical engineer works with different types of materials like steel, copper, brass , aluminum , timber , bricks, stones etc. the materials are used for manufacturing machine parts, tolls or preparing jobs. Mechanical properties of the materials play a very important role in designing the various engineering components. It is therefore essential for a mechanical engineer to understand the behavior of materials under different “ force of actions” and laboratory tests for determining various engineering properties of materials.

Objectives: The student will be able to

1. Understand different types of forces acting on engineering components.

2. Understand behavior of materials under different forces of actions.

3. Conduct the laboratory tests on different materials.

4. Develop the ability of interpreting the test results.

5. Understand the basic principle of behavior of materials.

6. Ascertain the strength of materials under various types of loadings

Programme : Diploma in Mechanical Engineering / Rubber Tech.

Course Code : AM 14 205 Course Title : Strength of Materials

C / O : Compulsory

Credits Duration of

Written Examination

Examination Scheme


4 - 2 6 3Hours

2 Tests of 1 Hour each

80 20 - - 50 150



SECTION –I (40 Marks)

Topic No

Contents

Hrs. Marks

1 ELASTICITY, STRAIN AND STRESS 1.1 Definition of deformation , Rigid, elastic, plastic body ,

elasticity, stress and strain 1.2 Stress – strain curve for ductile materials , Hooke’s law ,Elastic limit, modulus of elasticity, tensile & comp. stress, factor of safety, working stress and safe stress. 1.3 Change in length in the bars of uniform cross section due to

axial loading. 1.4 Change in length in the bars of stepped cross section due

axial loading.

1.5 Stress and strain in composite sections under axial loading,

simple problems. 1.6 Stress and strain developed due to temperature changes, simple problems.

06 10

2 ELASTIC CONSTANTS 2.1 Lateral strain, Poisson’s ratio, biaxial and Tri axial Stresses. 2.2 Volumetric strain, change in volume due to axial, biaxial and tri- axial loading .Bulk modulus. 2.3 Shear load, shear stress and shear strain, modulus of rigidity &

complementary shear stress 2.4 Relation between between E, K and G.

03 06

3 STRAIN ENERGY 3.1 Definition and Concept of Strain energy , types of loading gradual , sudden & Impact loading. 3.2 Stresses developed due to gradual , sudden & impact load. 3.3 Strain energy stored due to gradual & sudden & impact

loading. 3.4 Resilience, proof resilience and modulus resilience .

03 06

4 PRINCIPAL PLANES & PRINCIPAL STRESSES 4.1 Concept of principal planes & stresses. Definition of principal planes, principal stresses, oblique plane and obliquity. 4.2 Different states of stresses, normal & Tangential stress on oblique plane , resultant stress. 4.3 Locating principal plane and calculating principal stresses. 4.4 Theories of failure- Maximum principal stress theory (Rankine`s theory) Maximum shear stress theory (Guest’s and Tresca’s theory)

06 06

5 SHEAR FORCE & BENDING MOMENT 5.1 Types of beams, types of supports, concept and definition of Shear force (S.F). and bending moment ( B.M) 5.2 S.F and B.M diagrams for simply supported ,overhang beams subjected to point load & UDL ( No problem to be set for External moment or couple) 5.3 S.F and B.M diagrams for cantilever subjected to point load & UDL ( No problem to be for External moment or couple)

06 10



SECTION –II (40 Marks)

Topic No

Contents

Hrs. Marks

6

MOMENT OF INERTIA (M I) 6.1 M.I. for plane areas, radius of gyration, M.I for regular plane areas

–rectangle , triangle, circle, semi-circle , hollow rectangular and hollow circular section

6.2 Parallel axes theorem , perpendicular axes theorem ( no derivation)

6.3 M.I of symmetrical and unsymmetrical I sections, channel and angle sections and T section. 6.4 M.I of built up sections symmetrical and unsymmetrical about centroidal axis .

06 10

7 DIRECT AND BENDING STRESSES 7.1 Concept of direct and bending stresses, section modulus. 7.2 Eccentric loads, Core or kernel of section, middle third rule, middle fourth rule 7.3 Members of uniform sections subjected to eccentric loads with eccentricity and stress distribution at the base. 7.4 Structure subjected to horizontal,vertical loads e.g. tie bars, columns etc. 7.5 chimney of uniform cross section subjected to wind loads.

06 10

8 AXIALLY LOADED STRUTS AND COLUMNS 8.1 Definition of strut, tie, column and buckling 8.2 Euler’s formula , limitations of Euler’s formula. 8.3 Definition conditions of column and equivalent length. 8.4 Rankine’s formula 8.5 Simple problems

06 08

9 TORSION 9.1 Assumptions in the theory of torsion 9.2 Torsion equation 9.3 Power transmitted by shaft. 9.4 Simple problems on circular solid / hollow shaft

03 06

10 THIN WALLED PRESSURE VESSELS 10.1 Definition of thin and thick cylinder, stresses in a thin cylinder. 10.2 Principal stresses in a thin cylinder 10.3 Change in length , thickness and volume of cylinder 10.4 Simple problems.

03 06

Laboratory work and Term work : The term work shall consist of

a) Journal based on any six experiments from the following in the laboratory. 1. Tensions test on Mild steel/ Aluminium specimen, plotting of stress

strain curve and indicating significant point , I.S. requirement.



2. Bending test on timber 3. Izod Impact test on M.S, C.I, Copper, Aluminium and Brass to

indicate importance of test. 4. Hardness Test ( Brinell Hardness) on various metals. 5. Shear test – single and double shear for mild steel bar. 6. deflection test on timber/ metal specimen 7. Torsion Test on metal bar. 8. Compression test on metal. 9. Compression test on timber.

b) Two plates ( Quarter size Drawing sheet) shall contain Graphical solution of

problems on principal planes and principal stresses ( Two diff. Cases) c) One assignment on each topic covering at least three different problems and

their solution. d) Two plates shall contain shear force and bending moment diagrams for simply

supported and cantilever beams subjected to U.D.L & point load ( 2+2 problems)

Text Books:

Sr.No

Author Title Publication

1 R.S.Khurmi Strength of Materials S. Chand & Company

2 Walavalkar Strength of Materials Everest Pub – House , Pune 30

3 S.S.Bhavikatti

Strength of Materials Vikas Publishing House Pvt.Ltd.

4 S.Ramamrutham

Strength of Materials Dhanpat Rai Publishing

Co.(P)Ltd.

5 S.B. Junnarkar Mechanics of Structure Part-I

Charotar Publishing House

Reference Books:

Sr.No

Author Title Publication

1 S. Timoshenko Strength of Materials D. Van Nostrand Company Inc.

2 Ferdinand L. Singer

Strength of Materials Hapor & Row Publisher,

New York

3 E. J. Hearn

Problems in Strength of Materials

Longmans Green & Co. Ltd.

Documents

Programme : Rubber Technology · Rubber Technologist should be able to understand various aspect of ... Rubber technology RT11 301Mould Design – 3 – Rationale – –