GDQ analysis of unsteady creep in a rotating temperature-dependent FGM disk

Primary (unsteady) and secondary (steady) regimes of creep deformation of a rotating disk made of an Al–SiC functionally graded material (FGM) is investigated using the generalized differential quadrature (GDQ) method. The disk is subjected to three different types of the temperature gradient in the radial direction, and a temperature dependence of the material properties is assumed. The primary and secondary creep is described by Norton's law in which the creep parameters depend on the volume fraction distribution of SiC reinforcement particles, temperature, and particle size. It is shown that the creep rates are strongly dependent on the temperature gradient type, prevailing temperature, and content of reinforcing particles at any point of the disk.