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Plasticity-based modelling of fibre/matrix debonding in unidirectional composites

机译：基于可塑性的单向复合材料中纤维/基体剥离的建模

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Of interest in this work is the elastoplastic-based modelling of fibre/matrix debonding in unidirectional fibre-reinforced composites. The modelling is embedded into the integrity-basis formulation of transverse isotropy that allows for a neat decomposition of the contributions to the mechanical behaviour into fibre-directional, transverse, and pure shear parts. This offers an appealing framework where plastic yielding is easily formulated. The criterion can be chosen to depend solely on the tension transverse to the fibres, on the in-plane shear stress along them, or on both of the above stresses. The whole formalism is easily implemented in a finite element software to build efficient predictive computational tools. The formulation is developed for fully three-dimensional problems as well as for the particular two-dimensional problems under the plane-stress assumption. The application to some examples reveals the accordance with many experimental observations found in the literature. Among others, it is found that in all cases, the predicted debonding path always propagates along the direction of the reinforcing fibres.
机译：在这项工作中有趣的是单向纤维增强复合材料中基于纤维/基体剥离的基于弹塑性的建模。该模型被嵌入到横向各向同性的完整性基础公式中，该公式可以将对机械行为的贡献完整分解为纤维方向，横向和纯剪切部分。这提供了一个引人入胜的框架，可轻松制定塑料产量。可以选择标准，以仅取决于横向于纤维的张力，沿纤维的面内剪切应力或上述两个应力。整个形式主义可以在有限元软件中轻松实现，以构建有效的预测计算工具。该公式是针对完全三维问题以及平面应力假设下的特定二维问题而开发的。在一些实例中的应用揭示了与文献中发现的许多实验观察结果一致的结果。其中，发现在所有情况下，预测的脱粘路径总是沿增强纤维的方向传播。

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