Application of photo elasticity for the measurement of internal stresses in indeterminate structures

Photoelasticity, an optical technique for experimental stress analysis, is widely used for 2-D and 3-D analysis of components for getting the information of principal stress difference and principal stress direction at every point in the domain. The recent developments in digital image processing have given birth to a separate branch of photoelasticity called digital photoelasticity. This method can be successfully employed to determine the stresses in structures with complicated shapes and loading. This paper gives a review of integrated photoelasticity and of its application for residual stress measurement in indeterminate structures. Significant reported methods on Photoelasticity for stress determination of indeterminate structures for the last 30 years has been analysed.