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Nonlinear postbuckling of FG-GRC corrugated cylindrical shells subjected to external pressure based on the Donnell shell theory taking into account geometrical nonlinearity in Von Karman sense is presented. By using Galerkin method and three term solution of deflection, an approximated analytical solution to the nonlinear buckling and postbuckling of FG-GRC corrugated cylindrical shells are performed. The nonlinear critical buckling load and postbuckling curve of the shells are numerically investigated. Effects of geometrical and material parameters on buckling behavior of FG-GRC corrugated cylindrical shells are investigated.
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