Modelling impact damage in marine composite panels
Modelling impact damage in marine composite panels
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DOI：
10.1016/j.ijimpeng.2008.01.013
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发表时间：
2009-01-01
影响因子：
5.1
通讯作者：
Fallah, A. S.
中科院分区：
文献类型：
--
作者：
Johnson, H. E.;Louca, L. A.;Fallah, A. S.
为了确定复合结构在动态载荷下的生存能力，能够预测所产生的损伤以及接触力的影响是很重要的。低速冲击造成的损伤往往是隐蔽的，并且对于较厚的板，横向应力在促进分层方面是显著的。在这项研究中，使用一种简单的、逐渐损伤的三维材料模型对长达1.37米的编织乙烯基酯复合板进行数值模拟，并将结果与全尺寸试验进行比较。该模型基于损伤力学原理，利用循环试验数据来获得随损伤的模量降低。使用内聚力单元，通过混合模式的 traction - separation定律对分层进行模拟。编织层的非线性弹性正交各向异性材料模型是在Abaqus/Explicit中的VUMAT中编写的，并且通过对接触力的研究简要讨论了改变一些建模参数的影响。（C）2008 Elsevier Ltd.保留所有权利。
In order to establish the survivability of a composite structure under a dynamic load, it is important to be able to predict the damage incurred and the effect of the contact force. The damage caused by low velocity impact is often hidden and for thicker plates the transverse stresses are significant in promoting delamination. In this study, woven vinyl-ester composite plates up to 1.37 m long are numerically modelled with a simple, gradually damaging three-dimensional material model and the results are compared with full-scale tests. The model is based on damage mechanics principles using cyclic test data to obtain modulus reduction with damage. Delamination is modelled with a mixed-mode traction-separation law using cohesive elements. The nonlinear elastic orthotropic material model for the woven plies is written in a VUMAT in Abaqus/Explicit and the effects of varying some of the modelling parameters are briefly discussed through the examination of the contact force. (C) 2008 Elsevier Ltd. All rights reserved.