静水压力作用下夹层复合材料圆柱壳的屈曲特性OA

Based on the first-order shear deformation theory and finite-element simulation analysis,the buckling characteristics and influencing factors of sandwich composite pressure-resistant cylindrical shells under hydrostatic pressure loads were studied.First,based on the first-order shear deformation theory and the energy method,the buckling governing equations of sandwich composite cylindrical shells under hydrostatic pressure loads were derived.Then,by expanding the displacement function using a double-trigonometric function method,a theoretical solution method for the elastic buckling load of sandwich composite cylindrical shells with simply supported ends was presented.Finally,in the numerical examples,by comparing with the theoretical solutions of existing studies and the finite-element simulation values of the elastic buckling of sandwich composite cylindrical shells,the maximum error was 5.6％,verifying the correctness of the proposed method.Based on the proposed method and finite-element simulations,the influence laws of parameters such as the surface winding angle,the length-diameter ratio of the shell,the elastic modulus and thickness of the core material on the structural buckling load,as well as the applicable scope of the proposed method,were respectively studied.