Internal Crack Detection and Analysis using Thermoelastic Stress Analysis

摘要

TSA is a well established technique for stress analysis.Recent studies have revealed that the technique can be used to detectsub-surface defect effectively.In this study, the technique has been used to examine the thermoelastic response to subsurfacedamage in simple bar specimens.The non-adiabatic thermoelastic response from areas close to the damage hasbeen studied.The study shows that the phase of the response with respect to that of the reference signal can be used toidentify presence of sub surface defects, and may also be used to classify the severity of the defects.