关键词: 复合材料, 后屈曲, 半张力场, 余虚功, 剪切

Abstract:

In this paper, a method of analysing thin-walled structure with post-buckled composite shear panels is proposed. The post-buckled shear panels are assumed to be in a stress state of semi-tension field. The panels have been treated as equivalent shear panel, then the cove-ntional finite element method can be employed in the analysis of this structure. The rigidity of the equivalent shear panel is equal to the incremental rigidity of the post-buckled composite shear panel, while the latter is determined by the principle of complementary virtual work and the principle of minimum complementary energy. The conventional finite element method can be applied in the determination of incremental displacements. Then, the incremental stress components and the incremental strain components of the post-buckled composite shear panels can be found by the principle of complementary virtual work.

Key words: composite, post-buckling, semi-tension field, complementary virtual work, shear