Failure Models and Criteria for Frp Under In-Plane or Three-Dimensional Stress States Including Shear Non-Linearity
Failure Models and Criteria for Frp Under In-Plane or Three-Dimensional Stress States Including Shear Non-Linearity
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发表时间：
2013-07
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通讯作者：
S. Pinho;C. Dávila;P. Camanho;L. Iannucci;P. Robinson
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作者：
S. Pinho;C. Dávila;P. Camanho;L. Iannucci;P. Robinson
摘要提出了一套层合纤维增强复合材料的三维破坏准则LaRC04。这些准则是基于每种破坏模式的物理模型，并考虑了非线性矩阵剪切行为。基于Mohr-Coulomb准则的基体压缩破坏模型预测了断裂角度。纤维扭结是由纤维的初始不对准角度和纤维在压缩载荷时的旋转引起的。利用该模型对平面纤维扭结进行了预测。LaRC04由6个表达式组成，可以直接用于设计目的。介绍了几种涉及大范围负载组合的应用，并与实验数据和其他现有标准进行了比较。使用LaRC04的预测与实验数据有很好的相关性，可以说比大多数现有的标准更好。这种良好的相关性似乎归因于潜在破坏模型的物理健全性。在发展一种精确且计算效率高的数值程序来预测损伤的过程中，最大的困难与如何建模有关
AbstractA set of three-dimensional failure criteria for laminated fiber-reinforced composites,denoted LaRC04, is proposed. The criteria are based on physical models for eachfailure mode and take into consideration non-linear matrix shear behaviour. Themodel for matrix compressive failure is based on the Mohr-Coulomb criterion and itpredicts the fracture angle. Fiber kinking is triggered by an initial fiber misalignmentangle and by the rotation of the fibers during compressive loading. The plane offiber kinking is predicted by the model. LaRC04 consists of 6 expressions that canbe used directly for design purposes. Several applications involving a broad rangeof load combinations are presented and compared to experimental data and otherexisting criteria. Predictions using LaRC04 correlate well with the experimentaldata, arguably better than most existing criteria. The good correlation seems to beattributable to the physical soundness of the underlying failure models. 1 IntroductionThe greatest difficulty in the development of an accurate and computationallyefficient numerical procedure to predict damage has to do with how to model