Material and Geometric Nonlinear Analysis of Ceramic/Metal Functionally Graded Cylindrical Shell

This paper presents material and geometric nonlinear analysis of ceramic/metal functionally graded cylindrical shell using a user-defined subroutine (UMAT) developed and implemented in Abaqus/Standard. The behavior of the ceramic/metal functionally graded cylindrical shell is assumed elastoplastic with isotropic hardening according to Ludwik hardening law. Using the Mori–Tanaka model and self-consistent formulas of Suquet, the effective elastoplastic material properties are determined and are assumed to vary smoothly through the thickness of the cylindrical shell. The effects of the geometrical parameters and the material distribution on nonlinear responses are examined.