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为在设计复合材料机械连接时有据可循,采用有限元分析方法,对复合材料机械连接层合板进行分析,给出正交异性带孔板相对边距H/d以及相对宽度d/B对孔边应力集中的影响,结果表明:H/d及d/B对孔边应力集中因子的影响较大;随H/d的增加,最大环向应力集中因子Kmaxσθ减小,而径向最大应力与挤压应力比Krd变化不大;当复合材料板的宽度减小时,环向最大应力与挤压应力比Kσd增大,而Krd几乎不会随d/B的改变而改变,但径向应力的分布会因孔外形的变化而产生明显的差异。为复合材料机械连接设计提供了一定的参考。
For the mechanical connection of composite materials, the finite element analysis method was used to analyze the mechanical connection laminates of composite materials. The relative margins H / d and relative width d / B of the Orthotropic perforated plates were given The results show that H / d and d / B have a great influence on stress concentration factor at the hole edge. As the H / d increases, the maximum stress concentration factor Kmaxσθ decreases, while the maximum radial stress When the width of the composite board decreases, the ratio of maximum stress to compression stress increases with Kσd, while Krd hardly changes with the change of d / B. However, the radial stress The distribution of holes due to changes in shape and significant differences. It provides a reference for the design of composite mechanical connection.