| Simulation of Fragment Impact on Multi-Layer Targets Using Contact Method |
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| 作者姓名： | XIN Xudong CRAWFORD John E |
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| 作者单位： | Karagozian ＆ Case, 2550 N. Hollywood Way, Suite 500, Burbank, CA 91505, USA |
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| 摘 要： |
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| 关 键 词： | 爆破 触点 有限元分析 碎片碰撞 多层结构 渗透 模拟 |
| 收稿时间： | 2006-06-30 |
Simulation of Fragment Impact on Multi-Layer Targets Using Contact Method |
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| XIN Xudong CRAWFORD John E.Simulation of Fragment Impact on Multi-Layer Targets Using Contact Method[J].Transactions of Tianjin University,2006,12(B09):152-157. |
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| Abstract: | Cased explosives generate highly energetic fragments as their casing breaks up. Due to the complexity of casing fragment related behavior such as embedment, perforation and ricochet, it may be insufficient to use equivalent triangular pressure loading in fragment impact simulations. This simplified method may over- or under-predict the target response. Recently, a procedure using contact techniques has been proposed to overcome such difficulties. It has been shown that the new method has the inherent capability in modeling the multi-piece and multi-hit fragment impact problems in a more realistic way. To investigate the applicability of the proposed method to simulations involving multi-layer penetration, the selected problems of fragment impact on multi-layer targets are described in this paper. It is demonstrated that this method is capable of predicting the complicated multi-layer structural response caused by fragment impact and penetration, Modeling procedures and some technical issues are also discussed. |
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| Keywords: | contact finite element fragment impact multi-layer penetration simulation |
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