Functionally Graded Rotating Cylinder

The present study investigates the steady state creep in a rotating thick-walled composite cylinder, with constant angular speed and made up of aluminum matrix and reinforced with silicon carbide particles (SiC). The distribution of SiC is assumed to be either uniform or decreasing linearly from the inner to the outer radius of the cylinder. The thermal gradient in the rotating functionally gradient cylinder is estimated by performing Finite Element Analysis with ANSYS software. Further, the creep behavior of the cylinder has been described by threshold stress based creep law and the material of the cylinder is assumed to be yielding as per Von-Mises criterion. The creep parameters required to be used in the creep law, are obtained by conducting regression analysis. The mathematical models have been developed to describe steady state creep in the composite cylinder. The basic equilibrium equation of the cylinder and other constitutive equations have been solved to obtain creep stresses and strain rates in the cylinder.The creep rates reduce to significant extent by imposition of particle gradient and thermal gradient together thereby increases the service lifetime of cylider.