Experimental Stress Analysis

By Prof. K. Ramesh | IIT Madras

Learners enrolled: 627

About the course:
The course covers the fundamental aspects of experimental stress analysis that includes exhaustive treatment of the most versatile techniques like photoelasticity and strain gauges and a brief introduction to the emerging techniques like digital image correlation. In addition, it also provides the fundamental aspects of six different experimental techniques such as Moiré, Brittle Coatings, Holography, Speckle Methods, Thermoelastic Stress Analysis and Caustics.

INTENDED AUDIENCE: Students in Engineering Colleges and working professionals in similar areas

PRE-REQUISITES: Basic course on Strength of Materials. Course on Theory of Elasticity desirable

INDUSTRY SUPPORT: HAL, GE, GM, NAL, DMRL, DRDO, BEML, Mahindra & Mahindra, Tata Motors, L&T, VSSC, Defence and Atomic energy Laboratories

Summary

Course Status :	Completed
Course Type :	Elective
Duration :	12 weeks
Category :	Mechanical Engineering Advanced Mechanics
Credit Points :	3
Level :	Undergraduate/Postgraduate
Start Date :	23 Jan 2023
End Date :	14 Apr 2023
Enrollment Ends :	06 Feb 2023
Exam Registration Ends :	17 Mar 2023
Exam Date :	30 Apr 2023 IST

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

Page Visits

Course layout

Week 1 : Overview of Experimental Stress Analysis

Week 2 : Physical Principle of Experimental Techniques, Introduction to Various experimental Techniques

Week 3 : Fringe Patterns – Richness of Qualitative Information, Multi Scale Analysis

Week 4 : Selection of Experimental Techniques, Introduction to Crystal Optics

Week 5 : Light Ellipse, Retardation Plates and Plane Polariscope

Week 6 : Jones Calculus, Plane and Circular Polariscope analysis

Week 7 : Compensation Techniques, Calibration of Photo-elastic Materials

Week 8 : Fringe ordering and Three-Dimensional Photo-elasticity

Week 9 : Photo-elastic Coatings

Week10 : Brittle Coatings and Strain Gauges Introduction

Week11 : Strain Gauge Alloys, Performance of Strain Gauge System

Week12 : Correction factor for Special Applications

Books and references

1. K. Ramesh, Developments in Photoelasticity - A renaissance. IOP Publishing, 2021. DOI: https://doi.org/10.1088/978-0-7503-2472-4

2. K. Ramesh, P_Scope® – a virtual polariscope, Photomechanics Lab, IIT Madras,2017. URL: https://home.iitm.ac.in/kramesh/p_scope.html

3. K. Ramesh, e-Book on Experimental Stress Analysis, IIT Madras, 2009. URL: https://home.iitm.ac.in/kramesh/ESA.html

4. K. Ramesh, Digital Photoelasticity – Advanced Techniques and Applications, Springer, 2000. DOI: https://doi.org/10.1007/978-3-642-59723-7

5. W.N. Sharpe (Ed.), Springer Handbook of Experimental Solid Mechanics, Springer, 2008 DOI: https://doi.org/10.1007/978-0-387-30877-7

6. J.W. Dally and W.F. Riley, Experimental Stress Analysis, McGraw-Hill, 1991

7. L.S. Srinath, M.R. Raghavan, K. Lingaiah, G. Gargesa, B. Pant, and K. Ramachandra, Experimental Stress Analysis, Tata Mc Graw Hill, 1984

Instructor bio

Prof. K. Ramesh

IIT Madras

K. Ramesh is currently the K Mahesh Chair Professor at the Department of Applied Mechanics, IIT Madras; and formerly a Professor at the Department of Mechanical Engineering, IIT Kanpur. He has made significant contributions to the advancement of Digital Photoelasticity. He received his undergraduate degree in Mechanical Engineering from the Regional Engineering College, Trichy (now NIT, Trichy), Postgraduate degree from the Indian Institute of Science, Bangalore and the Doctoral Degree from the Indian Institute of Technology Madras.

He has made significant contributions to the advancement of Digital Photoelasticity. This has resulted in a Monograph on Digital Photoelasticity Advanced Techniques and Applications (2000), Springer, a chapter on Photoelasticity in the Springer Handbook of Experimental Solid Mechanics (2009), a chapter on Digital Photoelasticity in the book on Digital Optical Measurement Techniques and Applications (2015), Artech House London and a recently published book on Developments in Photoelasticity - A renaissance (2021), IOP Publishing, UK. He has over 190 publications to date of which two have been reproduced in the Milestone Series of SPIE. His research has been funded by organizations such as ARDB, ISRO, DST, EU (FP7) and NSF. He received the Zandman award for the year 2012, the first Indian to receive it since its inception in 1989, instituted by the Society for Experimental Mechanics, USA for his outstanding research contributions in applications utilizing photoelastic coatings.

He has been a Fellow of the Indian National Academy of Engineering since 2006. He received several awards such as Distinguished Alumnus Award of NIT, Trichy (2008), President of India Cash Prize (1984). He has been a member of the Editorial Boards of the International Journals: Strain (since 2001), Journal of Strain Analysis for Engineering Design (2009–10), Optics and Lasers in Engineering, and a steering committee member of Asian Society for Experimental Mechanics since its inception in 2000.
For Details See: https://home.iitm.ac.in/kramesh

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: 30 April 2023 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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