Abstract
Thermoelastic stress analysis is a technique of experimental stress analysis to visualize distribution of the sum of the principal stresses utilizing the thermoelastic effect of elastic solid. It is normally assumed that the object is in adiabatic condition and, therefore, that the distributions of the temperature and the sum of the principal stresses are identical. However, this is actually not the case because of the heat conduction within the object. In this study, a simple inversion technique has been proposed for reconstructing the distribution of the sum of the principal stresses from the temperature distribution obtained by the thermography. The effectiveness of this inversion technique has been verified through numerical simulation. In particular, the mollification method is shown to be effective for improving the accuracy of reconstruction.
