A numerical simulation of the blast impact of square metallic sandwich panels
A numerical simulation of the blast impact of square metallic sandwich panels
复制标题
方形金属夹芯板爆炸冲击的数值模拟
DOI：
10.1016/j.ijimpeng.2008.12.004
复制
发表时间：
2009-05-01
影响因子：
5.1
通讯作者：
Gad, Emad
中科院分区：
文献类型：
--
作者：
Zhu, Feng;Zhao, Longmao;Gad, Emad
本文介绍了爆炸荷载作用下方形蜂窝夹芯板的试验研究的详细情况和简要结果。在实验的基础上，利用LS-DYNA软件进行了相应的有限元模拟。详细描述的模型和仿真结果。在模拟工作中，研究了炸药的加载过程和夹层板的响应。爆炸加载过程既包括装药的爆炸过程，也包括与板的相互作用过程。从两个方面研究了夹芯板的结构响应：（1）试件的变形/破坏模式;（2）定量评估，主要关注夹芯板背面的永久中心点挠度。此外，已进行了参数研究，以检查的贡献，塑性拉伸和弯曲的夹层板的变形历史，以及边界条件的影响。数值计算结果与实验结果吻合较好，因此，本文提出的有限元模型可作为评估和理解爆炸载荷作用下方形金属夹层结构变形/破坏机理及预测其动力响应的有效工具。(C)2008爱思唯尔有限公司保留所有权利。
This paper presents details and brief results of an experimental investigation on the response of square metallic sandwich panels with a cellular core under blast loading. Based on the experiments, corresponding finite element simulations have been undertaken using the LS-DYNA software. Detailed description of the models and simulation results is presented. In the simulation work, the loading process of explosive and response of the sandwich panels have been investigated. The blast loading process includes both the explosion procedure of the charge and the interaction with the panel. The structural responses of sandwich panels are studied in terms of two aspects: (1) deformation/failure patterns of the specimens; and (2) quantitative assessment, which mainly focuses on the permanent centre point deflection of the back face of the panels. In addition, a parametric study has been carried out to examine the contribution of plastic stretching and bending on the deformation history of the sandwich panels, as well as the effect of boundary conditions. A good agreement has been obtained between the numerical and experimental results, and thus the proposed FE model can be considered as a valuable tool in assessing and understanding the deformation/failure mechanism and predicting the dynamic response of square metallic sandwich structures subjected to blast loading. (C) 2008 Elsevier Ltd. All rights reserved.