考虑双模量影响的复合材料销钉连接失效分析

摘要/Abstract

摘要：

摘要：针对复合材料层压板销钉连接结构连接特性，提出一种考虑双模量影响的破坏载荷的数值模拟方法.考虑复合材料在拉伸和压缩应力状态下弹性模量的不同，根据材料所处应力条件选择适当的刚度矩阵，以三维Hashin准则作为单向复合材料层压板的失效判据，采用Camanho的刚度折减模型，将3组不同厚度和铺层的复合材料层压板破坏载荷的试验结果与考虑双模量影响和仅用拉伸模量的有限元模拟结果进行对比.结果表明，考虑双模量影响的有限元模型能够更加准确地预测最终层压板销钉连接结构的破坏载荷.

关键词: , 复合材料, 双模量, 销钉连接, 渐进失效

Abstract:

Abstract： A numerical simulation method considering the effect of bimodularity was proposed for the failure analysis of pinnedjoint composite laminates. Owing to different modulus in tension and compression for composite materials, an appropriate stiffness matrix was chosen according to the stress condition. The onset of damage at each ply was predicted by 3DHashin initiation criterion together with Camanho degradation rule. Three sets of composite laminates with different thicknesses and stacking sequencees were studied. Comparison studies were conducted between experimental results and those obtained from the finite element calculations using bimodular and/or tension modulus. The results show that the finite element model considering the effect of bimodularity can more accurately predict the ultimate failure load of pinnedjoint composite laminates.

Key words: composite, bimodulus, pinjoint, progressive damage

中图分类号:

TB 332

李璇，陈秀华，史晓辉，汪海. 考虑双模量影响的复合材料销钉连接失效分析[J]. 上海交通大学学报（自然版）, 2015, 49(01): 101-108.

LI Xuan,CHEN Xiuhua,SHI Xiaohui,WANG Hai. Effect of Bimodularity on Failure Behaviors of Pinned-Joint Composite Laminates[J]. Journal of Shanghai Jiaotong University, 2015, 49(01): 101-108.

参考文献

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