含开口复合材料柱面壳压缩性能

实验研究了含开口补强三分之一弧长复合材料柱面壳结构的压缩行为.测试的开口补强件在开口处最终发生屈曲破坏,其最终屈曲载荷为65.922 kN.利用ABAQUS有限元软件建立相应有限元模型研究其屈曲行为,将屈曲破坏形式及载荷的计算结果与实验结果进行比较,证明所建立的模型正确有效.研究结果表明:在不补强情况下,随着开口面积增加,压缩屈曲载荷并非完全递减,而是在某一个开口面积范围内具有极大和极小值;在补强情况下,如果开口面积一定,屈曲载荷与开口高度成正比,与开口宽度成反比.因此,在设计和工艺允许的情况下,应尽量增加开口高度.

Compressive behaviour of composite cylindrical shell with open hole

The compressive behavior of one-third composite cylindrical shell with opening reinforcement was studied under a compress load.The reinforced specimen was tested and failed in buckling at 65.922 kN near the open hole.A finite element model was established in ABAQUS to investigate the buckling behavior of the composite cylindrical shell.The computational results and experimental results of buckling failure mode and buckling load were compared to verify the validity of the finite element model.The results show that as opening area increases,the buckling load of the shell without reinforcement does not decrease progressively.However,in a certain range of opening area,the structure gets maximum and minimum buckling load values.While in the case of reinforcement,with the opening area being constant,the buckling load is in direct proportion with opening height,and is in inverse proportion with opening width.To considering design and workmanship,opening height should be increased.