Effect of stress exponent on steady state creep in a functionally graded rotating disc

Abstract

The effect of the stress exponent on steady state creep in a functionally graded rotating disc made up of isotropic Aluminium-Silicon Carbide particulate (Al-SiCp) of constant thickness has been investigated. A mathematical formulation of creep performance described by Sherby creep law and a computer code following the formulation for FGM disc has been developed, with different values of true stress exponent n, varying particle content size (P) with changing reinforcement volume mixtures. It is observed that the radial and tangential stresses and strain rates in disc are extensively affected by variable stress exponent, particle content size and reinforcement volume. But, in fact the trend of stresses and strain rates in the FGM disc remains same by changing the value of the parameters discussed above.