全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

冲击作用下HMX晶体孔洞塌缩热点生成机制的细观数值模拟

DOI: 10.11858/gywlxb.2011.01.002, PP. 8-14

Keywords: 离散元法,热点,孔洞塌缩,细观数值模拟

Full-Text   Cite this paper   Add to My Lib

Abstract:

热点的形成、点火以及成长过程是理解非均匀炸药冲击起爆的关键。采用离散元法,对冲击作用下含孔洞的HMX晶体进行了细观数值模拟。计算结果表明:在较低冲击作用下,孔洞边缘发生了较大的剪切变形,粘塑性功形成热点;而在较高冲击作用下,孔洞塌缩产生射流,汇聚流动,冲击下游炸药形成热点,并获得了孔洞塌缩和热点生成演化的细观过程。

References

[1]  Campell A W, Davis W G, Travis J R. Shock Initiation of Detonation in Liquid Explosives [J]. Physics of Fluids, 1961, 4(4): 498.
[2]  Zhang G R, Chen D N. The Initiation Dynamics in Condensed Explosives [M]. Beijing: National Defense Industry Press, 1991. (in Chinese)
[3]  章冠人, 陈大年. 凝聚炸药起爆动力学 [M]. 北京: 国防工业出版社, 1991.
[4]  Sun J S, Zhu J S. Theory Detonation Physics [M]. Beijing: National Defense Industry Press, 1995. (in Chinese)
[5]  孙锦山, 朱建士. 理论爆轰物理 [M]. 北京: 国防工业出版社, 1995.
[6]  Sun C W, Wei Y Z, Zhou Z K. Application Detonation Physics [M]. Beijing: Science Press, 2000. (in Chinese)
[7]  孙承伟, 卫玉章, 周之奎. 应用爆轰物理 [M]. 北京: 科学出版社, 2000.
[8]  Dienes J K, Middleditch J, Kershner J D, et al. Progress in Statistical Crack Mechanics: An Approach to Initiation [A]//Proceedings of the 12th Symposium (International) on Detonation [C]. San Diego, 2002.
[9]  DienesJ K, Kershner J D. Multiple-Shock Initiation via Statistical Crack Mechanics [A]//Proceedings of the 11th Symposium (International) on Detonation [C]. Colorado, 1998: 717-724.
[10]  Dey T N, Kamm J R. Numerical Modeling of Shear Band Formation in PBX-9501 [A]//Proceedings of the 11th Symposium (International) on Detonation [C]. Colorado, 1998: 725-734 .
[11]  Chitanvis S M. Hotspot Mechanisms in Shock-Melted Explosives [J]. AIP Conf Proc, 2004, 706: 319-322.
[12]  Tang Z P, Horie Y, Psakhie S G. Discrete Meso-Element Dynamic Simulation of Shock Response of Reactive Porous Solids [J]. AIP Conf Proc, 1996, 370: 657-660.
[13]  Tang Z P, Horie Y, Psakhie S G. Discrete Meso-Element Modeling of Shock Processes in Powders [A]//High-Pressure Shock Compression of Solids Ⅳ [C]. New York: Springer-Verlag, 1997: 143-176.
[14]  Tang Z P, Horie Y, Psakhie S G. Discrete Meso-Element Modeling of Shock Processes in Powders, Vol. 1-Theory and Model Calculations [R]. Hefei: NCSU, 1995:
[15]  Wang W Q. The Discrete Element Method and Its Application in Material and Structure Mechanics [D]. Hefei: USTC, 2000. (in Chinese)
[16]  王文强. 离散元方法及其在材料和结构力学响应分析中的应用 [D]. 合肥: 中国科学技术大学, 2000.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133