Stress analysis in a functionally graded rotating disc of non-uniform thickness under thermal loading

Abstract

In the present thesis work, the stress analysis has been carried out in a functionally graded disc of non-uniform thickness, rotating at constant angular velocity and subjected to internal pressure and thermal loads by using infinitesimal deformation theory of elasticity. For the purpose of investigation, three discs, made of composite containing silicon carbide particles in a matrix of pure aluminium, with varying particle content along the radius are considered. The material of the disc is assumed to be isotropic with constant Poisson’s ratio. The Young’s modulus of elasticity, density and thermal expansion coefficient, are varying along the radial direction. For this purpose, power law functions are used. The influence of particle content and basic factors such as, thickness gradient, grading index, thermal loading and internal pressure on stresses, strain rates and displacement in rotating FGM disc have been investigated.