The creep stress analysis of a functionally graded thin rotating disk made up of orthotropic material whose thickness and density varies exponentially has been done in this paper. The basic constituents for the formulation of the problem have been evaluated using generalized strain measure. Transition theory has been used to calculate the numerical expressions for the angular speed and creep stresses for the disk. From the numerical analysis of the evaluated equations, it has been concluded that for angular speed (Ω~2= 30 & 50), isotropic material i.e. functionally graded steel is better substitute than orthotropic material i.e. functionally graded topaz and barite.
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