考虑纤维初始位错的复合材料轴向压缩性能

发布时间：2018-01-13 01:30

本文关键词：考虑纤维初始位错的复合材料轴向压缩性能　出处：《复合材料学报》2017年08期 　论文类型：期刊论文

【摘要】：通过试验及模拟对复合材料的轴向压缩失效过程进行了研究。试验中,采用高速摄像机对失效过程进行捕捉,并对最终破坏模式进行光学显微镜分析。基于纤维初始位错、纤维随机强度及基体Ducker-Prager塑性本构,通过有限元软件ABAQUS建立了复合材料轴向压缩的有限元模型,并对比分析剪切型及拉伸型两种不同初始位错模型的模拟结果。研究结果表明,复合材料轴向压缩包含弹性变形及塑性变形阶段,离散的纤维基体二维有限元模型能够有效模拟压缩的渐进损伤过程,且模拟结果与试验结果相吻合。复合材料轴向压缩强度是纤维初始位错及塑性基体剪切屈服共同作用的结果,其随着纤维初始位错幅值的减小、波长的增加及纤维体积分数的增加而增加。
[Abstract]:The axial compression failure process of the composite is studied by experiment and simulation. In the experiment, high-speed camera is used to capture the failure process. The ultimate failure mode was analyzed by optical microscope, based on the initial dislocation of fiber, the random strength of fiber and the plastic constitutive model of matrix Ducker-Prager. The finite element model of composite material under axial compression was established by the finite element software ABAQUS, and the simulation results of two different initial dislocation models, shear and tensile, were compared and analyzed. Axial compression of composite materials includes elastic deformation and plastic deformation. The discrete two-dimensional finite element model of fiber matrix can effectively simulate the progressive damage process of compression. The axial compression strength of the composite is the result of the joint action of the initial dislocation of fiber and the shear yield of the plastic matrix, which decreases with the decrease of the initial dislocation amplitude of the fiber. The increase of wavelength and fiber volume fraction increase.
【作者单位】：北京航空航天大学航空科学与工程学院;
【分类号】：TB33
【正文快照】： 网络出版地址:http://www.cnki.net/kcms/detail/11.1801.TB.20161115.1013.008.html引用格式:张弥,关志东,黎增山,等.考虑纤维初始位错的复合材料轴向压缩性能[J].复合材料学报,2017,34(8):1754-1763.ZHANG Mi,GUAN Zhidong,LI Zengshan,et al.Longitudinal compressive prop

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