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首页> 外文会议>IUTAM Symposium on Multiscale Modelling of Damage and Fracture Processes in Composite Materials; 20050523-27; Dolny(PL) >A MICROSCALE MODEL OF ELASTIC AND DAMAGE LONGITUDINAL SHEAR BEHAVIOR OF HIGHLY CONCENTRATED LONG FIBER COMPOSITES
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A MICROSCALE MODEL OF ELASTIC AND DAMAGE LONGITUDINAL SHEAR BEHAVIOR OF HIGHLY CONCENTRATED LONG FIBER COMPOSITES

机译：高浓度长纤维复合材料的弹性和损伤纵向剪切行为的微观模型

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摘要

The elastic and damage longitudinal shear behavior of highly concentrated long fiber composites are studied by a micro-mechanical model. Attention is focused on the effects of circular cracks along the fiber-matrix interfaces on the overall properties of composites. The fracture is initiated by the touching of adjacent fibers, and develop according to the Griffith energy criterion. The longitudinal shear moduli μ_x, μ_y and μ_(xy), which are important in the case of non-uniform tractions applied to the fibers, are investigated, and their dependence on the damage (the fiber-matrix cracks) are determined. The statistical properties of the elastic behavior are detected by Monte Carlo simulations. The crack propagation is then investigated, and various evolution curves are presented. The elastic and the ultimate limits are finally determined and discussed in detail.
机译：通过微观力学模型研究了高浓度长纤维复合材料的弹性和损伤纵向剪切行为。注意集中在沿着纤维-基质界面的圆形裂纹对复合材料整体性能的影响。断裂是由相邻纤维的接触引起的，并根据格里菲斯能量准则发展。研究了纵向剪切模量μ_x，μ_y和μ_（xy），它们在施加到纤维上的牵引力不均匀时很重要，并确定了它们对损伤（纤维基体裂纹）的依赖性。弹性行为的统计特性通过蒙特卡洛模拟进行检测。然后研究裂纹的扩展，并给出各种演化曲线。最终确定并详细讨论了弹性极限和极限极限。

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