基于纤维随机分布的单向复合材料拉伸破坏过程模拟

The simulation of damage process for uni-directional composite materials based on fibers' stochastic distribution

单向复合材料的极限拉伸强度受纤维强度变化和纤维随机分布的影响。本文提出了一种合理的纤维随机分布假设,并以此建立了剪滞数值模型。利用蒙特卡罗模拟方法结合现有模型分析了单向复合材料的拉伸失效过程,得到极限拉伸强度。与文献模型相比较的结果表明,本文的模型结果更理想。

Ultimate Tensile Strength （UTS） of composite materials is influenced by the variation in fiber strength and randomness of fibers ＇ distribution. A shear-lag numerical model,which depends on areasonable hypothesis of fiber distribution, is built in this paper. A Monte-Carlo simulation using current model is used to analyze the failure process of uni-directional composites and obtain the UTS. Compared with model from llterature,current model obtains much more perfect results.