An Investigation on Thermoelastic Behavior of Functionally Graded Thick Spherical Vessels under Combined Thermal and Mechanical Loads

The subject of this paper is to study the thermoelastic behavior of thick functionally graded hollow sphere under thermal and mechanical loads. The mechanical and thermal properties of FG sphere are assumed to be functions of radial position. The Hatta-Taya, and Rosen-Hashin relations are considered to determine the effective thermal properties of functionally graded sphere while the Mori-Tanaka scheme is used to estimate the mechanicl properties. The results of modeling of materials properties with the use of Mori-Tanaka, Hatta-Taya and Rosen-Hashin relations are compared with the results of Rule of Mixture method. Finally, the effect of material composition on temperature, displacement and stress distributions is investigated.

Keywords:

Functionally graded material , Hollow sphere , Thermal stress