Mechanical Behavior of Polymers and Composites

By Prof. Naresh Varma Datla | IIT Delhi

Learners enrolled: 1002 | Exam registration: 137

ABOUT THE COURSE:
The course introduces to the various engineering aspects of polymers and composites. It discusses the unique mechanical properties that these materials offer over metals and how they are related to the structure of the materials. It teaches the mechanics of these materials that include the viscoelastic analysis of polymers and classical lamination theory for composite laminates. It also describes the failure behavior and design aspects of these materials. The course prepares a student to work on research and engineering problems related to polymers and composites.

INTENDED AUDIENCE: UGs and PGs from Mechanical, Materials, Aerospace, Automotive, Civil, and other related engineering branches. Working professionals associated with polymers and composites.

PREREQUISITES: UG courses in Engineering Mechanics and Solid Mechanics

INDUSTRY SUPPORT: All industries working on polymers and composites such as aerospace, automotive, marine, railway, sports, infrastructure, and energy.

Summary

Course Status :	Completed
Course Type :	Elective
Language for course content :	English
Duration :	12 weeks
Category :	Mechanical Engineering Metallurgy and Material science & Mining Engineering Aerospace Engineering Civil Engineering
Credit Points :	3
Level :	Undergraduate/Postgraduate
Start Date :	22 Jul 2024
End Date :	11 Oct 2024
Enrollment Ends :	05 Aug 2024
Exam Registration Ends :	16 Aug 2024
Exam Date :	03 Nov 2024 IST

Note: This exam date is subject to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week 1: INTRODUCTION TO POLYMERS

Common polymers and applications
Bonding and polymerization
Thermoplastics, thermosets, elastomers and natural polymers

Week 2: MECHANCIAL BEHAVIOR OF POLYMERS

Molecular packing (crystalline and amorphous), glass transition temperature
Viscoelastic and rubbery behavior; Cold drawing and crazing
Creep and relaxion tests

Week 3: LINEAR VISCOELASTIC MODELS

Linearity – isochronous stress strain response
Kelvin, Maxwell, 3 parameter and 4 parameter models
Generalized Kelvin and Maxwell models

Week 4: STRESS ANALYSIS IN POLYMERS

Boltzmann superposition principle
Alfred’s correspondence principle
Stress analysis of bars and beams

Week 5: POLYMER CHARACTERIZATION AND DESIGN

Time temperature superposition principle, WLF equation
Dynamic mechanical analysis, storage and loss modulus
Plastic design considerations and practices

Week 6: INTRODUCTION TO COMPOSITES

What are composites and how they are different from other materials
Advantages and applications; Materials and types of composites
Aspects involved with composite structures

Week 7: 3D STRESS STRAIN RELATIONS IN MATEIRALS

Generalised Hooke’s law for anisotropic materials
Stress-strain and material symmetry
Engineering constants for orthotropic materials

Week 8: MECHANICS OF LAMINA

2D stress strain relations of lamina
Failure criteria of lamina

Week 9: MECHANICS OF LAMINA

Hygrothermal stress in lamina
Estimation of lamina properties from properties of constituent materials

Week 10: MECHANICS OF LAMINATE

Classical lamination theory
Stiffnesses of commonly used stacking sequences

Week 11: MECHANICS OF LAMINATE

Hygrothermal stresses in laminate
Failure strength of laminates

Week 12: DESIGNING WITH COMPOSITES

Design principles and considerations in composite structures
Composite sandwich structures
Testing, joining and repair of composites

Books and references

Jones and Ashby, Engineering Materials 2: An Introduction to Microstructure & Processing, 4th ed., 2012.
H F Brinson and L C Brinson, Polymer Engineering Science and Viscoelasticity, Springer, 2nd Ed., 2015.
R J Crawford, Plastics Engineering, Elsevier/Butterworth-Heinemann,4th Ed., 2020.
R M Jones, Mechanics of Composite Materials, CRC Press, 2nd Ed., 1999.
R F Gibson, Principles of Composite Material Mechanics, CRC Press,4th Ed., 2016.
J C Gerden, Engineering Design with Polymers and Composites, CRC Press, 2nd Ed., 2012.

Instructor bio

Prof. Naresh Varma Datla

IIT Delhi

Prof. Naresh V Datla is a faculty member in the Department of Mechanical Engineering at Indian Institute of Technology Delhi since 2014. He received his Ph.D. from University of Toronto, Canada, M.E. from Indian Institute of Science Bangalore, and B.Tech. from National Institute of Technology Warangal all in Mechanical Engineering. Prior to starting his Ph.D., he worked for about two years at Indian Space Research Organisation in Bangalore. Before joining as a faculty at IIT Delhi, he worked as a postdoctoral fellow at Temple University, USA. His teaching and research interests are in mechanical design, mechanics of materials, and failure analysis

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: 03 November 2024 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.

CRITERIA TO GET A CERTIFICATE

Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Madras .It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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