Nonlinear analysis of degenerated FGM shells

摘要

In this work we deal with nonlinear behavior of functionally graded material for cylindrical panel and spherical structure. The formulation chosen in this work is based on Von Karman theory for large transverse deflection with the layer-by-layer approach. The mechanical properties are assumed to vary continuously through thickness direction according to the volume fraction of the constituents by a simple power law distribution. The shell element developed is based on a nine nodes degenerated finite element formulation with height order shear deformation theory. The effect of variations of volume fractions and shell geometrical parameters are studied, the influence of elastoplasticity is also the subject of this work. Convergence tests and comparison studies have been carried out to establish the efficiency of the present model.