ABSTRACT
The creep behavior of a rotating disc composed of linearly varying functionally graded material subjected to thermal gradation has been studied. This study will provide new insights to material engineers and designers for its applications in gas turbines, jet engines, and other dynamic operators. Rotating disc operates under intense thermomechanical loading, which causes significant creep reducing its service life. The anisotropic yield criterion given by Hill has been used by taking into account different types of anisotropy of disc under thermal gradation. The creep behavior has been described by Sherby’s law. Investigations for disc acting under parabolically decreasing temperature profile from inner to outer radii have been carried out. The results obtained for anisotropic discs have also been compared with those obtained for isotropic composites using von Mises criterion. The study revealed that the presence of thermal gradation has reduced the creep rates significantly near the outer radius.
