Experimental Techniques to find Thermal Residual Stress in Composite Materials ?A study of the Literature Review

If two dissimilar materials are joined at high temperature, a very high residual stresses developed near the interface of materials. The mismatch between the co-efficient of thermal expansion leads to stress concentrations at the interface. These Residual stresses were found to affect the composites matrix-dominated, mechanical and durability properties, as well as to inflict damage and dimensional instability. Over the last years several methods have been developed to measure the residual stresses. This paper aims to explain the different experimental methods to measure residual stresses and to provide overview of advancement in this area to help researchers to choose on their applications.7