Optimal Design of Laminated Sandwich Panels Constrained with Local Bucklings Subjected to Out-of-Plane Load, Using Advanced Genetic Algorithm

This paper presents weight optimization of laminated sandwich panels with simply supported edges, subjected to out-of-plane load. Face wrinkling and intracell buckling are two famous local buckling of sandwich panels that are comprised important constraints of this optimization. A nonlinear analytical method has been exhibited using shear deformation effect and midplane displacement. Because of problem complexity and discontinuity of variables, genetic algorithm is preferred for this optimization. In this algorithm, a new method has been considered to stacking sequence and selection of facing and core materials. Finally, comparative results for various loads are presented.