Postbuckling Analysis of Core-corrugated Sandwich FG-GRC Laminated Cylindrical Shells Subjected to External Pressure

An analytical approximation for nonlinear stability analysis of core-corrugated sandwich graphene-reinforced cylindrical shells is presented in this paper. A homogenization model for corrugated structures is used for corrugated core layer and the governing equation system for cylindrical shells are formulated considering the von Karman-Donnell nonlinear theory. Three-term solution form of deflection is chosen, and the nonlinear postbuckling relation can be formulated by applying the Galerkin procedure. The result of examinations validates the effects of the corrugated core layer, graphene volume fraction and graphene distributions with different geometric ratios on the nonlinear stability behaviors of corrugated cylindrical shells.