Numerical analysis of two-dimensional plate problem with defects by dynamic thermoelastic equation combined with non-Fourier heat transfer equation

In this study, we investigated the propagation and reflection behavior of thermal and elastic waves based on a dynamic thermoelastic equation coupled with a non-Fourier heat conduction equation for two-dimensional plate problems under plane stress condition. This paper focuses on numerical simulations of photoacoustic microscopy and reports the results of assuming circular defects near the surface of a two-dimensional plate to investigate the effects of differences in defect size and depth on the temperature and particle velocity along the plate surface and stress distribution in the plate. It was found that the presence of defects caused thermal and elastic waves to be reflected and synthesized, resulting in large oscillations in these distributions. In particular, it was observed that the temperature distribution was concentrated at the tip of the defect, and it was confirmed that the defect shape has a strong influence on the surface temperature distribution.