Thermal stress analysis of functionally graded disc with variable thickness due to linearly increasing temperature load

Abstract

In this study, the elastic stress analysis of a hollow disk made of functionally graded materials was subjected to a linearly increasing temperature distribution. These disks have many applications in the aerospace industry, such as gas turbines and break disks. Their life cycle can increase when the stress components are minimized. A functionally graded (FG) disk with variable thickness under a linearly increasing temperature distribution is considered in this paper. The calculation program was prepared by the authors using MATLAB 7.1®. The changes in stresses and displacements according to both gradient parameters and thickness profiles were investigated and presented. The results show that gradient parameters and thickness profiles play an important role in determining the thermal responses of FG disks and in determining an optimal design of these structures. © 2013 King Fahd University of Petroleum and Minerals.