Analysis of Transient Thermal Stresses in Moderately Thick Shells of Revolution of Functionally Graded Material with Temperature-Dependent Properties.

Abstract

This paper is concerned with the numerical analysis of transient thermal stress and deformation for moderately thick shells of revolution made of functionally graded material by using finite element method. The material properties of the shell are continuously inhomogeneous along the shell thickness and dependent on the temperature. The temperature distribution through the shell thickness is expressed with a curve of high order, and the temperature field in the shell is determined using the equations of heat conduction and heat transfer. As numerical examples, two kinds of functionally graded material shells composed of SUS304 and PSZ subjected to thermal loads due to fluid are treated ; one is a cylindrical shell and another is an axisymmetric shell having a constant meridional curvature. In comparison with the results from analytical solutions, good agreement is obtained. And it is found that deformations and stress distributions are significantly influenced by temperature dependent properties of the materials.