Nonlinear buckling analysis of clamped-free cylindrical sandwich shells with porous FG core

Based on a modified higher order sandwich shell theory, the buckling behaviors of cylindrical sandwich shells are investigated. Sandwiches consist of two homogeneous face-sheets and a functionally graded core. Functionally graded materials are varied gradually across the thickness based on a power law rule which modified by considering the even and uneven porosity distributions. All materials are temperature dependent. Nonlinear Von-Karman strain, thermal stresses in all layers and in-plane strain and transverse flexibility of the core are considered to obtain the governing equations based on the minimum potential energy principle. A Galerkin method is used to solve the problem in a clamped-free boundary condition under an axial in-plane compressive load. The results of the present method are compared with some literatures to verify the procedure. Also, the effect of variation of temperature, some geometrical parameters and porosities on the critical load are studied.

کلیدواژه ها:

Porosity ، Temperature-dependent ، FG Core ، Buckling ، clamped-free ، Sandwich shell