Peridynamic modeling of delamination growth in composite laminates
Peridynamic modeling of delamination growth in composite laminates
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DOI：
10.1016/j.compstruct.2015.05.079
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发表时间：
2015-11-15
影响因子：
6.3
通讯作者：
Madenci, E.
中科院分区：
文献类型：
--
作者：
Hu, Y. L.;De Carvalho, N. V.;Madenci, E.
在以前的动力学模型中，分层生长预测是基于每个层间键相互作用的恒定临界拉伸假设。本研究提出了一种终止层间环动力键的新方法。键的临界拉伸通过使用测量的不同变形模式的临界能量释放率值隐含地确定，并且可以根据变形程度而变化。当跨越一个单位表面去除键所需的能量等于两层之间界面的临界能量释放率时，就会发生键破坏。将该方法应用于双悬臂梁（DCB） （I型）和横向裂纹拉伸（TCT） （II型）试件的分层生长模型。周动力预测与文献中现有的数值和实验结果相吻合。(C) 2015 Elsevier Ltd.版权所有。
Delamination growth predictions in previous peridynamic models were based on the assumption of constant critical stretch for each interlayer bond interaction. This study presents a new approach to terminate the interlayer peridynamic bonds. The critical stretch of a bond is implicitly determined by using the measured critical energy release rate values for different modes of deformation, and can vary depending on the degree of deformation. The bond failure occurs when the amount of energy required to remove the bonds across a unit surface equals the critical energy release rate of the interface between the two layers. This approach is applied to model delamination growth in double cantilever beam (DCB) (Mode I) and transverse crack tension (TCT) (Mode II dominated) specimens. The peridynamic predictions correlate well with the numerical and experimental results available in the literature. (C) 2015 Elsevier Ltd. All rights reserved.