| EFP模拟弹丸侵彻陶瓷复合靶的数值模拟研究 |
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| 引用本文： | 李金柱,黄风雷,张连生.EFP模拟弹丸侵彻陶瓷复合靶的数值模拟研究[J].计算力学学报,2009,26(4):562-567. |
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| 作者姓名： | 李金柱 黄风雷 张连生 |
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| 作者单位： | 北京理工大学爆炸科学与技术国家重点实验室,北京,100081 |
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| 基金项目： | 国家自然科学基金(50279047);浙江省自然科学基金(Y104413)资助项目. |
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| 摘 要： | 运用LS_DYNA程序中描述陶瓷本构关系的JHC模型和二维轴对称拉格朗日算法,对EFP模拟弹丸侵彻不同厚度99氧化铝陶瓷块/金属复合靶试验进行了数值模拟,获得了侵彻过程中陶瓷的损伤演化和分布以及在A3钢背板中的侵彻深度,与实验结果进行了比对,总的侵彻深度基本相符。数值模拟和试验所得残余侵彻深度与陶瓷厚度之间基本上都呈一种良好的线性关系,因此所得质量防护系数和差分防护系数都随着陶瓷厚度的增加而增加。通过分析侵彻过程中的陶瓷损伤与演化发现:陶瓷块尺寸过小时会由于稀疏波作用使陶瓷抗弹性能下降。
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| 关 键 词： | 模拟EFP JHC模型 损伤演化 氧化铝陶瓷/金属复合靶 质量防护系数 |
| 收稿时间： | 2008/12/6 0:00:00 |
Numerical simulations of simulated EFP penetration into alumina ceramic/steel composite target |
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| LI Jin-zhu,HUANG Feng-lei and ZHANG Lian-sheng.Numerical simulations of simulated EFP penetration into alumina ceramic/steel composite target[J].Chinese Journal of Computational Mechanics,2009,26(4):562-567. |
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| Authors: | LI Jin-zhu HUANG Feng-lei and ZHANG Lian-sheng |
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| Institution: | State Key Laboratory of Explosion Science and Technology;Beijing Institute of Technology;Beijing 100081;China |
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| Abstract: | With the Johnson-Holmquist constitutive ceramic model and Lagrangian algorithm,computations are presented for the simulated EFP penetrating into alumina ceramic/steel composite target.The penetration depths acquired by simulations are compared with test data,which show the simulation results are reliable.The dependent relations are given out between residual penetration depths,mass efficient factor,differential factor and ceramic tiles thickness both for simulation results and test data.The damage initiatio... |
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| Keywords: | simulate EFP alumina ceramic mass efficiency factor JHC model damage distribution |
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