Experimental Stress Analysis. Instructor: Prof. K. Ramesh, Department of Applied Mechanics, IIT Madras. The course covers the basic aspects of experimental stress analysis that includes exhaustive treatment of the most versatile techniques like photoelasticity and strain gauges and also 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 Moire, brittle coatings, holography, speckle methods, thermoelastic stress analysis and caustics.
(from nptel.ac.in)
Lecture 23 - Miscellaneous Topics in Transmission Photoelasticity
Concepts covered in this lecture: Resolving the ambiguity on the principal stress direction, Determination of the sign of the boundary stress, Compatibility conditions, Role of elastic constants on stress field, Model to prototype relations, Properties of photoelastic model materials.