THERMOPLASTIC ANALYSIS OF FUNCTIONALLY GRADED ROTATING DISCS WITH VARIABLE THICKNESS UNDER THERMO-MECHANICAL LOADING AND UNLOADING
Keywords:
A. functionally graded rotating disk; B. unloading behavior; B. Residual/internal stress; C. variable material property theory; C. Finite element analysis (FEA).Abstract
This work presents an analysis of the thermo-mechanical behavior of rotating discs made of functionally graded material (FGM) with variable thickness and constant angular velocity. The solutions are obtained by variable material property (VMP) theory. In this theory, the domain is divided into some finite sub-domains in the radial direction, in which the thermo-mechanical properties are assumed to be constant and the form of the elastic response is used to solve elastic-plastic problems. The results obtained by the VMP method are then compared with the results obtained by the finite element analysis using ANSYS software. In addition, the unloading and reverse yielding behavior of FG rotating disk are investigated and the residual stresses are then calculated with the same values of pressure and temperature by VMP theory and FE analysis. The results reveal that the mentioned methods are in very good agreement in both elastic and elasto-plastic states
