A Review of Analytical Micromechanics Models on Composite Elastoplastic Behaviour
A Review of Analytical Micromechanics Models on Composite Elastoplastic Behaviour
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DOI：
10.1016/j.proeng.2016.12.159
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Yanchao Wang;Zheng-ming Huang
中科院分区：
文献类型：
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作者：
Yanchao Wang;Zheng-ming Huang
复合材料结构的弹塑性性能是其轻量化应用的关键问题，几十年来一直受到人们的广泛关注。复合材料弹塑性模拟的大多数方法可以分为三类：1）数值方法，也称为计算细观力学方法，2）上界和下界的变分方法，以及3）分析均匀化模型。本研究仅侧重于分析模型。分析模型的建立需要两个步骤，即选择合适的线弹性均匀化模型和合理的线性化理论，从而将线弹性模型推广到非线性弹塑性区域。此外，考虑到各向同性材料由于塑性变形可能变为各向异性的情况，文献中发现了三种方法来处理各向异性性质和相应的Eshelby张量。总之，比较研究了九种不同的模型，以评估其弹塑性行为模拟的能力。并利用一系列单向复合材料在不同加载工况下的试验数据进行了对比。
Elasto-plastic behavior of composite structures is a key problem in light-weight application, which has been investigated vastly for decades. Most approaches for composites elasto-plastic simulation can be split into three categories: 1) numerical methods also known as computational micromechanics methods, 2) variational approaches for upper and lower bounds, and 3) analytical homogenization models. In this study only focuses on the analytical models. Two steps are essential to establish an analytical model, i.e. choosing a suitable linear elastic homogenization models and a rational linearization theory so that linear elastic models can be extended to nonlinear elasto-plastic regime. Besides, considering the situation that isotropic materials may become anisotropic due to plastic deformation, three approaches are found in the literature to deal with the anisotropic properties and corresponding Eshelby's tensor. In summary, a comparative study is made among nine different models to evaluate their capabilities on elasto-plastic behavior simulation. Experiment data of a series of unidirectional composites under different loading cases are used for the purpose of comparison.