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Compressive buckling analysis of rectangular composite laminates containing multiple delaminations

机译:包含多个分层的矩形复合材料层压板的压曲屈曲分析

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摘要

The buckling analysis of rectangular composite laminates with multiple embedded delaminations under in-plane compressive load is performed using Mindlin plate elements in a finite element method. The buckling load and mode are obtained by solving an eigenproblem. Each sublaminate in the delaminated region is assigned with a separate mid-plane. The penalty function method is used to enforce constraints preventing overlap between sublaminates. Numerical results show the effect of the number, size and shape of delaminations on the buckling load and a comparison is made between the effects of multiple delaminations and a hole on the buckling load.
机译:使用Mindlin板单元以有限元方法对在平面压缩载荷下具有多个嵌入分层的矩形复合材料层压板进行屈曲分析。屈曲载荷和模态是通过求解本征问题获得的。分层区域中的每个子分层都分配有单独的中间平面。惩罚函数方法用于强制执行约束,以防止子层压板之间的重叠。数值结果显示了分层的数量,大小和形状对屈曲载荷的影响,并比较了多个分层和孔对屈曲载荷的影响。

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