| 球形弹丸超高速撞击铝靶的分子动力学模拟 |
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| 引用本文： | 巨圆圆,张庆明,龚良飞,武强,龚自正.球形弹丸超高速撞击铝靶的分子动力学模拟[J].航天器环境工程,2018,35(2):153-157. |
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| 作者姓名： | 巨圆圆 张庆明 龚良飞 武强 龚自正 |
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| 作者单位： | 中国人民解放军 91962 部队, 上海 200439,北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081,北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081,北京卫星环境工程研究所, 北京 100094,北京卫星环境工程研究所, 北京 100094 |
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| 基金项目： | 国家自然科学基金项目（编号：11032003，11221202）；国家重点基础研究发展计划项目（编号：2010CB731600） |
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| 摘 要： | 基于开源分子动力学程序LAMMPS建立球形铝弹丸超高速撞击铝靶的计算模型,模拟弹丸以10 km/s的速度超高速撞击单层靶、双层靶和半无限厚靶;获得了超高速碰撞靶板的物理过程及靶板损伤特性,与超高速碰撞宏观现象相似;厚靶成坑坑深与宏观经验公式计算结果基本一致。模拟结果初步表明,分子动力学方法可以对弹丸超高速碰撞薄靶和半无限厚靶进行模拟,为揭示碰撞过程中的微观机理提供了一种新的研究方法。
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| 关 键 词： | 超高速碰撞 分子动力学 势函数 碎片云 成坑 |
| 收稿时间： | 2017/11/15 0:00:00 |
| 修稿时间： | 2018/3/18 0:00:00 |
Molecular dynamics simulation for hypervelocity impact of spherical projectile to aluminum target |
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| JU Yuanyuan,ZHANG Qingming,GONG Liangfei,WU Qiang and GONG Zizheng.Molecular dynamics simulation for hypervelocity impact of spherical projectile to aluminum target[J].Spacecraft Environment Engineering,2018,35(2):153-157. |
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| Authors: | JU Yuanyuan ZHANG Qingming GONG Liangfei WU Qiang and GONG Zizheng |
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| Institution: | Unit 91962, PLA of China, Shanghai 200439, China,State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China,State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China,Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China and Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China |
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| Abstract: | With the open-source molecular dynamics program LAMMPS, the hypervelocity impact model for a spherical aluminum projectile impacting an aluminum target is established, and the impact process of the projectile to single plate, double plates and semi-infinite thick plate at a speed of 10 km/s is simulated. The physical process of impact and the damage characteristics of the target are similar to those observed in the macroscopic impact. The size of the crater in the semi-infinite thick plate is basically identical with the value deduced from the macro empirical formula. The simulation results preliminarily show that the molecular dynamics method is capable of simulating the hypervelocity impact of projectile to thin targets and semi-infinite targets, and that it provides a new approach for investigating the microcosmic mechanism involved in the hypervelocity impact. |
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| Keywords: | hypervelocity impact molecular dynamics potential function debris cloud crater formation |
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