CAE344 Experimental Stress Analysis Syllabus:
CAE344 Experimental Stress Analysis Syllabus – Anna University Regulation 2021
COURSE OBJECTIVES:
Of this course are
➢ Be able to understand the various experimental techniques involved for measuring displacements, stresses, strains in structural components.
➢ To familiarize with the different types of strain gages used.
➢ To familiarize with the instrumentation system used for strain gauges.
➢ Be able to use photo elasticity techniques and methods for stress analysis.
➢ Be able to familiarize with the different NDT techniques.
UNIT I BASICS OF MECHANICAL MEASUREMENTS
Basic Characteristics and Requirements of a Measuring System – Principles of Measurements – Precision, Accuracy, Sensitivity and Range of Measurements – Sources of Error – Statistical Analysis of Experimental Data – Contact Type Mechanical Extensometers – Advantages and Disadvantages – Examples of Non -Contact Measurement Techniques.
UNIT II ELECTRICAL-RESISTANCE STRAIN GAUGES
Strain Sensitivity in Metallic Alloys – Gage Construction – Gage Sensitivities and Gage Factor – Corrections for Transverse Strain Effects – Performance Characteristics of Foil Strain Gages – Materials Used for Strain Gauges – Environmental Effects – The Three-Element Rectangular Rosette for Strain Measurement – Other Types of Strain Gages – Semiconductor Strain Gages Grid & Brittle Coating Methods of Strain Analysis.
UNIT III STRAIN-GAUGE CIRCUITS & INSTRUMENTATION
The Potentiometer Circuit and Its Application to Strain Measurement – Variations from Basic Circuit –Circuit Output – The Wheatstone Bridge Circuit – Current and Constant Voltage Circuits – Analog to Digital Conversion – Calibrating Strain-Gage Circuits – Effects of Lead Wires and Switches – Electrical Noise -– Strain Measurement in Bars, Beams and Shafts – Circuit Sensitivity & Circuit Efficiency.
UNIT IV PHOTOELASTIC METHODS OF STRESS ANALYSIS
Introduction to Photo elastic Methods – 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 Photo elastic Stress Analysis – Fringe Multiplication and Fringe Sharpening – Materials for Two-Dimensional Photo elasticity – Properties and Calibrationof Commonly Employed Photo elastic Materials – Introduction to Three-Dimensional Photo elasticity.
UNIT V NON-DESTRUCTIVE TESTING
Different types of NDT Techniques – Acoustic Emission Technique – Ultrasonic – Pulse-Echo – Through Transmission – Eddy Current Testing – Magnetic Particle Inspection – X-Ray Radiography – Challenges in Non-Destructive Evaluation – Non-Destructive Evaluation in Composites – Image Processing Basics.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
Upon completion of this course, Students will be able to
CO1: Analyse the performance of measuring instrumentation.
CO2: Impart knowledge on different methods of strain measurement.
CO3: Design different strain gauge circuits.
CO4: Use photo elasticity for stress analysis.
CO5: Exposure the different types of non-destructive testing methods.
TEXT BOOKS:
1. Dally, J.W., and Riley, W.F., Experimental Stress Analysis, McGraw Hill Inc., New York1998.
2. Sadhu Singh, Experimental Stress Analysis, Khanna Publishers, New Delhi, 2009.
3. Srinath, L.S., Raghava, M.R., Lingaiah, K., Garagesha, G., Pant B., and Ramachandra, K., Experimental Stress Analysis, Tata McGraw Hill, New Delhi,1984.
REFERENCES:
1. Albert S. Kobayashi,’ Handbook on Experimental Mechanics, Prentice HallPublishers,2008.
2. Durelli, A.J.Applied Stress Analysis, Prentice Hall of India Pvt Ltd., New Delhi, 1970.
3. Hetenyi, M., Hand book of Experimental Stress Analysis, John Wiley and Sons Inc.,New York, 1972.
4. James F. Doyle and James W. Phillips, ‘Manual on Experimental Stress Analysis’,5thEdition, 1989.
5. Ramesh, K., Digital Photoelasticity, Springer, New York, 2000