In nearly all the failure criteria for the FRP (fiber reinforced plastic), the fundamental strength of the FRP under uniaxial tensile, compressive and pure shear stress were utilized to construct appropriate mathematical function relationship with the multiaxial stress. Among them, the strength of the FRP under transverse pure shear stress was influenced by various factors and could not be directly obtained from tests. In this paper, transverse pure shear failure behavior of FRP was studied using finite element analysis based on RVE models, the RSE and HC algorithm were utilized to generate the FRP with different fiber distribution, mainly refers the different fiber clusters which was commonly experimentally observed. The bilinear cohesive model and extended linear Drucker Prager model were used to characterize the mechanical behavior of the interface and matrix respectively. Then, constraint of periodic boundary condition was applied for the RVE models. Difference on failure fracture behavior of FRP with different fiber distribution were identified and assessed under transverse pure shear stress, while the connection between stress triaxiality and initial damage equivalent plastic strain of the matrix was also altered. On this basis, the distinction of the maximum transverse pure shear stress, the crack resistance strength and the transverse shear strength was thoroughly discussed and identified, which provided a theoretic reference for the failure analysis of the FRP.

中文翻译：

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纤维束单向FRP横向纯剪失效分析

在几乎所有FRP（纤维增强塑料）的失效准则中，都是利用FRP在单轴拉伸、压缩和纯剪切应力下的基本强度来构建与多轴应力的适当的数学函数关系。其中，FRP在横向纯剪应力作用下的强度受多种因素影响，无法直接通过试验获得。本文基于RVE模型，采用有限元分析方法研究FRP的横向纯剪切破坏行为，利用RSE和HC算法生成不同纤维分布的FRP，主要指实验中常见的不同纤维簇。双线性内聚模型和扩展线性Drucker Prager模型分别用于表征界面和基体的力学行为。然后，对 RVE 模型应用周期性边界条件的约束。识别和评估了不同纤维分布的FRP在横向纯剪应力下失效断裂行为的差异，同时也改变了应力三轴度与基体初始损伤等效塑性应变之间的联系。在此基础上，对最大横向纯剪应力、抗裂强度和横向剪切强度的区别进行了深入探讨和识别，为FRP的失效分析提供了理论参考。