Failure Analysis of Woven Composite Joint Under Bending Load
Failure Analysis of Woven Composite Joint Under Bending Load
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DOI：
10.1166/asl.2011.1549
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发表时间：
2011-08
影响因子：
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通讯作者：
Libin Zhao;Xiaoxiao Zhang;Jianyu Zhang;H. Huang;Xianzhu Liang
中科院分区：
文献类型：
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作者：
Libin Zhao;Xiaoxiao Zhang;Jianyu Zhang;H. Huang;Xianzhu Liang
详细研究了编织碳纤维增强复合材料接头在弯曲载荷下的破坏过程。全场应力数据是由一个三维有限元分析的关节。采用最大应力准则和修正的最大应力准则对破坏进行了校核。用退化准则定义的退化等效材料代替损伤材料。这三个方面构成了编织复合材料接头的渐进损伤分析模型，揭示了编织复合材料接头从损伤开始到断裂的破坏过程，并利用静态弯曲试验数据进行了验证。结果表明，数值分析对试验结果的预测是成功的：最终破坏时刻的数值预测值与试验值的相对误差小于6%;预测的失效位置和进展与实验等观察到的物理现象一致。数值模型描绘了内部强度耗散和失效机制等更多信息，从而对编织复合材料接头在弯曲载荷下的破坏行为有了更多的了解。
A detailed study of the failure progression developed in a woven carbon fibre reinforced composite joint under bending load is described. Full-field stress data is provided by a three dimensional finite element analysis of the joint. The failure is checked by maximum stress criterion and modified maximum stress failure criterion. And the damaged materials are replaced by a degraded equivalent material defined by the degradation rules. All the three aspects form a progressive damage analysis model of the woven composite joint to disclose the failure process from damage onset to rupture, and then are validated against static bending test data. The numerical analysis is shown to be successful in predicting the experimental outcomes: the relative error of final failure moment between the numerical prediction and experimental mean is less than 6%; the predicted failure location and progression are consistent with the physical phenomena observed from experiments, etc. More information like internal strength dissipation and failure mechanism are depicted by numerical models, which provide more understanding on failure behaviours of woven composite joint under bending load.