Stress and temperature distribution at layer interface excited by pulsed laser heating

Abstract

The stress and temperature distributions at a layer interface are important controlling factors in the crack initiation at a layer interface under laser pulse heating. In this paper, a boundary element method is presented to calculate the stresses and temperature at a layer interface considering the Green-Lindsay (GL) theory of generalized thermoelasticity. The layer absorbs the thermal energy from a pulsed laser in its surface plane. The pulse duration is of the order of the characteristic time for heat to diffuse across the layer thickness; hence heat conduction through the thickness of the layer cannot be neglected. The effects of the pulse duration and layer thickness on the stresses and temperature distributions of the layer are studied. Comparisons between the classical, Lord-Shulman, and GL theories are made.