材料科学
复合材料
纤维
体积分数
代表性基本卷
压力(语言学)
有限元法
刚度
应力集中
传输(计算)
复合数
微观结构
结构工程
断裂力学
工程类
哲学
并行计算
语言学
计算机科学
作者
Yong Yu,Boming Zhang,Zhanwen Tang,Guocheng Qi
标识
DOI:10.1016/j.compositesb.2014.09.035
摘要
A three-dimensional representative volume element (RVE) of unidirectional composites with both randomly distributed fibers and periodic geometry was generated using DIGIMAT-FE software. Finite element analysis of the stress transfer mechanisms around a fiber break in the RVE was performed via ABAQUS/Standard. The influences of distance to the broken fiber, fiber/matrix stiffness ratio and fiber volume fraction on the stress transfer process of intact fibers were discussed for the case of perfect fiber/matrix adhesion. The study shows that the nearest fibers and the second nearest fibers share the stress released from the broken fiber. The stress transfer coefficient and the ineffective stress transfer length of the nearest fibers was found to increase with the increasing distance to the broken fiber and the stiffness ratio, while decrease with the increasing fiber volume fraction. However, the trends in the two stress transfer parameters of the second nearest fibers are slightly different from those of the nearest fibers due to the random distribution of other intact fibers.
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