| 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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| EFP模拟弹丸侵彻陶瓷复合靶的数值模拟研究 |
| Numerical simulations of simulated EFP penetration into alumina ceramic/steel composite target |
| 投稿时间：2008-12-06 |
| DOI：10.7511/jslx20094021 |
| 中文关键词: 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 |
| 英文关键词:penetration pre-drilled cavity concrete target numerical simulation |
| 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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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 initiation and evolution in penetrating process are also showed. It demonstrates that the penetration-resisting performance of ceramic can be decreased greatly when the ceramic diameter is not enough big. |
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