AO4008 Experimental Methods of Stress Analysis Syllabus:
AO4008 Experimental Methods of Stress Analysis Syllabus – Anna University PG Syllabus Regulation 2021
COURSE OBJECTIVES:
1. This course introduces the basic principles and methods of experimental stress analysis.
2. This course helps to learn the principles and techniques of photoelastic measurements.
3. This course presents the principles and techniques of moire analysis.
4. This course helps to gain knowledge of the principles and a technique of strain gage measurements is presented.
5. This course also enables the students to learn basic principles of operation of electrical resistance strain gauges, interferometric techniques, and non destructive methods.
UNIT I BASIC CONCEPTS
Stresses, Strains and Displacements – Determination of Principal Values of Stresses and Strains in 2-D & 3-D – Maximum Shear Stress – Strain Measurement Using Mechanical Extensometers – Principles of Measurements – Basic Characteristics and Requirements of a Measuring System – Sources of error – Statistical Analysis of Experimental Data – Non-Contact Measurement.
UNIT II ELECTRICAL-RESISTANCE STRAIN GAGES
Strain Sensitivity in Metallic Alloys –Gage Construction –Gage Sensitivities and Gage Factor – Performance Characteristics of Foil Strain Gages – Environmental Effects –The Three-Element Rectangular Rosette –Corrections for Transverse Strain Effects – Other Types of Strain Gages – Semiconductor Strain Gages – Grid & Brittle Coating Methods of Strain Analysis.
UNIT III STRAIN-GAGE CIRCUITS & INSTRUMENTATION
The Potentiometer Circuit and Its Application to Strain Measurement – Variants From The Basic Potentiometer Circuit – Circuit Output – The Wheatstone Bridge Constant Current and Constant Voltage Circuits – Circuit Sensitivity – Calibrating Strain-Gage Circuits –Effects of Lead Wires and Switches – Electrical Noise Reduction – Strain Measurement in Bars, Beams and Shafts.
UNIT IV PHOTOELASTIC METHODS OF STRESS ANALYSIS
Introduction – Stress-Optic Law – Effects of a Stressed Model in a Plane Polariscope– Effects of a Stressed Model in a Circular Polariscope– Tardy Compensation – Two-Dimensional Photoelastic Stress Analysis – Fringe Multiplication and Fringe Sharpening – Properties of Commonly Employed Photoelastic Materials – Material Calibration – Introduction to Three-Dimensional Photoelasticity and digital photo elasticity.
UNIT V NON-DESTRUCTIVE TESTING
Different types of NDT Techniques – Acoustic Emission Technique – Ultrasonic – Pulse-Echo – Through Transmission – Eddy Current Testing – X-Ray Radiography – Challenges in NonDestructive Evaluation – Non-Destructive Evaluation in Composites – Concepts of Image Processing Theory.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
Upon completion of this course, Students will have
CO1: Knowledge of different methods of strain measurement.
CO2: Knowledge on electrical resistance strain gauge.
CO3: An ability to design experiments for strain measurements.
CO4: Acquired knowledge on photo elastic methods of stress analysis.
CO5: Exposure to non-destructive testing methods.
REFERENCES:
1. Albert S. Kobayashi,“Handbook on Experimental Mechanics”, Prentice Hall Publishers, 1987.
2. James W. Dally & William F. Riley, “Experimental Stress Analysis”, McGraw-Hill College, 1991.
3. James F. Doyle & James W. Phillips, “Manual on Experimental Stress Analysis”, 5th Edition, Society for Experimental Mechanics, 1989.
4. Sharpe Jr& William N, Springer, “Handbook of Experimental Solid Mechanics”, Springer, 2008.
5. Udpa. S.S & Patrick O. Moore, “Non-destructive Testing Handbook”, Electromagnetic Testing, Third Edition: Volume 5, 2004.
6. Ramesh, IIT Madras