Effect of thermal gradation on steady state creep of functionally graded rotating disc

The paper presents the steady state creep behavior of isotropic rotating disc made of parabolically varying functionally graded material in the presence of thermal gradient. The creep rates have been obtained for the discs rotating at elevated temperatures. Investigations for disc rotating at uniform temperature from inner to outer radii has been done using von Mises' yield criterion. Further, work has been extended for discs rotating at parabolically decreasing temperature. The results are exhibited graphically for the said temperature profiles. A small variation is observed for radial and tangential stresses for said thermal gradations. However, in the presence of thermal gradation the strain rates vary significantly as compared to disc at uniform temperature. Thus in functionally graded rotating disc the temperature gradation significantly effect the creep behavior of a rotating disc.