复合材料壳体轴压稳定性分析

利用有限元结构分析法,引入线性屈曲模态作为结构的初始几何缺陷,对复合材料壳体的轴压稳定性进行了非线性分析。将计算结果与线性屈曲分析及实验结果进行了对比,结果表明,由于初始缺陷等非线性因素的影响,结构的线性临界载荷高于非线性临界载荷,进行非线性分析是必要的。文中对壳体承受轴压能力进行了初步估计,可为复合材料壳体的稳定性工程设计提供参考。

Stability analysis of composite case under axial pressure

Regarding the linear buckling mode as the initial geometrical defect of the structure, the stability nonlinear analysis of composite case under axial pressure was made by means of the finite element method.The comparion between the nonlinear buckling analysis and linear buckling analysis and the test results shows that the linear critical load is higher than the nonlinear critical load because of the influence of the nonlinear factors such as the initial geometrical defect,so nonlinear analysis is necessary. The load bearing capacity of the composites case, which can provide a reference to the stability engineering design of the composites case,is preliminarily estimated.