Thermal stresses in functionally graded materials caused by a laser thermal shock

被引：0

作者：

T. Elperin

G. Rudin

机构：

[1] Department of Mechanical Engineering Pearlstone Center for Aeronautical Engineering Studies Ben-Gurion University of the Negev P.O. Box 653,

[2] Beer-Sheva 84105 Israel,undefined

来源：

Heat and Mass Transfer | 2002年 / 38卷

关键词：

Carbide; Tungsten; Thermal Stress; Thermal Shock; Tungsten Carbide;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Mathematical simulation of a thermal shock method for reliability testing of functionally graded material (FGM) is performed with the end to determine operating parameters of the testing device (power of a laser, laser beam radius, duration of heating) and to investigate the effect of the composition of FGM on a magnitude of thermal stresses in a coating. An analytical method for solution of the thermal elasticity problem is developed whereby the approach of a multilayer plate is used for determining temperature and thermal stresses distributions in a coating. We considered the limiting case of the obtained solution when the thickness of a layer is infinitesimally small and the number of layers tends to infinity. This procedure allowed us to obtain the thermal stresses distribution in a FGM coating. The results for the FGM coating composed of WC (tungsten carbide) ceramics and HS-steel are presented. It is showed that variation of the volume content of ceramics strongly affects thermal stresses in a coating and they decrease significantly in the case of the uniform spatial distribution of ceramics.

引用

页码：625 / 630

页数：5