Revised scheme for B.Tech. - Punjab Technical University

PTU/BOS/ME/101/10-06-2005/BATCH-2003
DE/ME-3.5 EXPERIMENTAL STRESS ANALYSIS
Internal Marks: 40 L T P
External Marks: 60 3 1 0
Total Marks: 100
1. Basic elasticity: Laws of stress transformation, principal stresses and principal
planes. Cauchy's stress quadric strain analysis, strain equations of transformation,
Cauchy's strain quadric, stress, strain relationship
2. Two Dimensional photoelasticity: Stress optics law, Optics of polarisation plane
and circular polariscope, dark and light field arrangements, fringe multiplication,
fringe sharp ending, compensation techniques, commonly employed photo elastic
materials
3. Dimensional photoelasticity; Neuman's strain optic relationship, stress freezing in
model materials for three dimensional photoelasticity, shear difference method for
stress separation.
4 Birefringence coatings: sensitivity, reinforcing effects, thickness of birefringence
coatings.
5 Electric resistance strain gauges; Gauge construction and installation, temperature
compensation, gauge sensitivities, gauge factor, corrections for transverse strain
effects, factors affective gauge relation, rosetters Rosetre analysis, potentiometer
and whetstone's bridge circuits for strain measurements.
6 Brittle coatings: Introduction, coating stresses and failure theories, different types of
crack patterns, crack detection composition of brittle coatings, coating cure, influence
of atmospheric conditions, effects of biaxial stress field.
Books
1. Experimental Stress Analysis by Dally and Rilley; McGraw Hill
2. Experimental Stress Analysis and Motion Measurement by Dow and Adams,
Prentice Hall
3. Introduction to Photo Mechanics by Durelly and Riley, Prentice Hall