Nonequilibrium Heating and Thermal Stress Development

Abstract

In the present study, analytical solution for nonequilibrium heating of metallic surfaces is presented and the closed-form solution for thermal stress distribution is obtained in relation to laser short-pulse heating process. Two stress boundaries are considered, which include the stress free boundary and the stress continuity at the surface. One-dimensional heating situation is incorporated to formulate temperature and stressfields. It is found that thermal stress developed in the surface region is tensile for stress free boundary condition and it becomes compressive as the distance from the surface increases. Thermal stress remains compressive and attains high values in the surface region for the stress continuity boundary at the surface.