Large deflection thermoelastic analysis of functionally graded stiffened annular sector plates

In this study the large deflection behaviors of stiffened annular functionally graded (FG) sector plates under mechanical and thermo-mechanical loadings with various boundary conditions are investigated. Material properties are assumed to be graded in the thickness direction according to a simple power law distribution in terms of the volume fractions of the constituents. Based on first-order shear deformation plate theory (FSDT) and von Karman relations for large deflection, nonlinear equilibrium equations are developed. Dynamic relaxation (DR) numerical method combined with the finite difference discretization technique is used to solve the plate nonlinear equations. Effects of material grading index, boundary condition, stiffener depth to the plate thickness ratio and thermal gradient are discussed.

► We investigate large deflection thermoelastic analysis of FG stiffened annular sector plates.
► When material grading index n increases, unlike Mr, more absolute values of w and Nr are resulted.
► By increasing the stiffener depth, maximum values of w, Nr and Mr are decreased.
► By increasing the material grading index n, the effect of stiffener is magnified.
► By applying thermal loading of stiffened FG sector plate, the values of w, Nr and Mr are increased