Progressive Damage Simulation of Triaxially Braided Composite Using a 3D Meso-Scale Finite Element Model
Progressive Damage Simulation of Triaxially Braided Composite Using a 3D Meso-Scale Finite Element Model
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DOI：
10.1016/j.compstruct.2015.01.034
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发表时间：
2015-07
影响因子：
6.3
通讯作者：
Chao Zhang;Ning Li;Wenzhi Wang;W. Binienda;H. Fang
中科院分区：
文献类型：
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作者：
Chao Zhang;Ning Li;Wenzhi Wang;W. Binienda;H. Fang
本文提出了一个全三维有限元模型，在细观尺度上开发，预测的渐进损伤行为的单层三轴编织复合材料拉伸载荷条件下。利用Murakami-Ohno损伤理论建立了纤维束各向异性损伤模型，预测了纤维束的损伤起始和发展。本文应用一个牵引-分离定律对纤维束界面的渐进损伤进行了理论预测。所提出的模型与实验相关的整体应力应变响应和局部应变分布。根据不同应变水平下的损伤等值线，得到了纤维束的损伤发展和界面层间脱层损伤，并与实验结果进行了对比分析。模型预测结果与实验结果的对比表明，该模型能够准确地模拟纤维束劈裂、自由边缘效应与分层的相互作用以及试件的最终失效等损伤发展过程。本文还通过数值参数研究讨论了材料特性/参数对整体响应的作用。
This article proposes a fully three-dimensional finite element model, developed at the meso-scale level, to predict the progressive damage behavior of a single-layer triaxially braided composite subjected to tensile loading conditions. An anisotropic damage model is established by Murakami–Ohno damage theory to predict damage initiation and progression in the fiber tows. A traction–separation law has been applied to predict theoretically the progressive damage of fiber tow interfaces. The proposed model correlates well with experiment on both global stress–strain responses and local strain distributions. According to the damage contours at different global strain levels, the damage development of fiber tows and interlaminar delamination damage of interface are obtained, explicitly analyzed and correlated with experimental observations. The comparison of model prediction and experimental observations indicate that the model can accurately simulate the damage development of this composite material, i.e. fiber bundle splitting, interaction of free-edge effect and delamination, and final failure of the specimen. This paper also discusses the role of material properties/parameters on the global responses through numerical parameter studies.