Modelling failure of composite specimens with defects under compression loading
Modelling failure of composite specimens with defects under compression loading
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DOI：
10.1016/j.compositesa.2012.12.007
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发表时间：
2013-05-01
影响因子：
8.7
通讯作者：
Wisnom, M. R.
中科院分区：
文献类型：
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作者：
Lemanski, S. L.;Wang, J.;Wisnom, M. R.
复合材料结构表现出许多不同的故障机制，但试图模拟复合材料故障经常作出先验假设的机制，故障将发生。Wang等人[I]对四种配置的复合材料试样进行了压缩试验，这些试样具有由跌落缺陷产生的面外波纹度。每种情况下的失败情况都有显著差异。这些实验的详细有限元模型，其中包括竞争的故障机制。该模型的预测与实验结果相关性很好-定性（故障的位置和形状的失败标本）和定量（故障负载）。该模型被用来确定在压缩试验过程中的失败的进展，确定每个配置的临界故障机制，并调查试样强度后的内聚参数的影响。这种建模方法，其中包括多个竞争的故障机制，可以应用于预测故障的情况下，故障机制是未知的。(C)2013爱思唯尔有限公司保留所有权利。
Composite structures exhibit many different failure mechanisms, but attempts to model composite failure frequently make a priori assumptions about the mechanism by which failure will occur. Wang et al. [I] conducted compressive tests on four configurations of composite specimen manufactured with out-of-plane waviness created by ply-drop defects. There were significantly different failures for each case. Detailed finite element models of these experiments were developed which include competing failure mechanisms. The model predictions correlate well with experimental results - both qualitatively (location of failure and shape of failed specimen) and quantitatively (failure load). The models are used to identify the progression of failure during the compressive tests, determine the critical failure mechanism for each configuration, and investigate the effect of cohesive parameters upon specimen strength. This modelling approach which includes multiple competing failure mechanisms can be applied to predict failure in situations where the failure mechanism is not known in advance. (C) 2013 Elsevier Ltd. All rights reserved.