Research on the Damage and Hot-spot Generation in Explosive Charges during Penetration into Single- or Multi-layer Target

doi:10.3969/j.issn.1000-1093.2020.01.004

Abstract

Abstract: It is difficult to study the influencing mechanism of explosive charges stability during the penetration into targets in a complex impact environment. The microscale hot-spot generation models which include crack friction and pore collapse are used to simulate the dynamic response, damage evolution and hot-spot generation of explosive charges during the penetration into the single- and multi-layer targets. The different generating mechanisms of hot-spot are analyzed through simulation and compared with the experimental results. The simulated results show that it is easy to generate the hot-spot in the explosive charges during the penetration into multi-layer target compared with single-layer target, and the explosive charges can easily be damaged more seriously under repeatedly loading and trajectory deflection in the penetration into multi-layer target, which also generates the hot-spot due to crack friction and pore collapse. The areas of head and tail of the explosive charges should be especially protected, where the hot-spots are easily generated. The influence factors, such as penetration velocity, fracture toughness and initial porosity of explosive charges, are analyzed. The stability of explosive charges can be improved by reducing the stress amplitude, decreasing the oscillation times of explosive charges in a shell, increasing the strength of explosive material and reducing the initial defect of charge.Key

Key words: explosivecharge, crackfriction, porecollapse, hot-spotgeneratingmechanism, explosivechargestability

CLC Number:

TJ410.3⁺41

CHENG Lirong， WANG Dewu， HE Yuanji. Research on the Damage and Hot-spot Generation in Explosive Charges during Penetration into Single- or Multi-layer Target[J]. Acta Armamentarii, 2020, 41(1): 32-39.

References

［1］杨世全. 国外钻地武器的现状与发展趋势: GF-A-0090570 G[R]. 绵阳:中国工程物理研究院, 2005.
YANG S Q. The development of foreign earth penetrating wea-pons: GF-A-0090570 G[R]. Mianyang: China Academy of Engineering Physics, 2005.(in Chinese)
[2］ WIEGAND D A. Constant strain criteria for mechanical failure of energetic materials[J]. Journal of Energetic Materials, 2003, 21(2): 109-124.
[3］ PROUD W G, WALLEY S M, WILLIAMSON D M. Recent trends in research on energetic materials at Cambridge[J]. Central European Journal of Energetic Materials, 2009, 6(1): 67-102.
[4］ LEFRANCOIS A, LAMBERET P, CHESNET P, et al. Microstructural analysis of HE submitted to penetration experiments[C]∥Proceedings of the 31st International Pyrotechnics Seminar. Fort Collins, CO, US: IPS USA Seminars, Inc., 2004.
[5］ LEFRANCOIS A, LAURENSON R, SADON Y, et al. Expertise of explosive survivability for future penetrator warheads[C]∥Proceedings of 2001 Insensitive Munitions and Energetic Materials Technology Symposium. Bordeaux, France: NDIA, 2001.
[6］ FIELD J E, SWALLOWE G M, HEAVENS S N. Ignition mechanisms of explosives during mechanical deformation[J]. Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1982, 382(1782):231-244.
[7］ FIELD J E. Hot spot ignition mechanisms for explosives[J]. Academy of Chemical Research, 1992, 25:489-496.
[8］ PERRY W L, CLEMENTS B, MA X, et al.Relating microstructure, temperature, and chemistry to explosive ignition and shock sensitivity[J]. Combustion and Flame， 2018, 190:171-176.
[9］钟凯, 刘建, 王林元, 等. 含能材料中“热点”的理论模拟研究进展[J]. 含能材料, 2018, 26(1):11-20.
ZHONG K, LIU J, WANG L Y, et al. Issue of ‘hot-spot’ in energetic materials: recent progresses of modeling and calculations[J]. Chinese Journal of Energetic Materials, 2018, 26(1):11-20. (in Chinese)

[10］王洪波, 王旗华, 卢永刚, 等. 冲击加载和斜波加载下PBX炸药细观结构点火特性对比[J]. 高压物理学报, 2017, 31(1): 27-34.
WANG H B, WANG Q H, LU Y G, et al. Igition characteristics of PBX explosives at meso-structural level under shock and ramp loading[J]. Chinese Journal of High Pressure Physics, 2017, 31(1): 27-34.(in Chinese)
[11］ KEYHANI A, KIM S, HORIE Y, et al. Energy dissipation in polymer-bonded explosives with various levels of constituent plasticity and internal friction[J]. Computational Materials Science, 2019, 159:136-149.
[12］ KIM S, WEI Y C, HORIE Y, et al.Prediction of shock initiation thresholds and ignition probability of polymer-bonded explosives using mesoscale simulations[J]. Journal of Mechanics and Phy-sics of solids, 2018, 114:97-116.
[13］陈文, 张庆明, 胡晓东，等. 侵彻过程冲击载荷对装药损伤实验研究[J]. 含能材料, 2009, 17(3):321-324.
CHEN W, ZHANG Q M, HU X D, et al. Experimental study on damage to explosive charge by impact load in the process of penetration[J]. Chinese Journal of Energetic Materials, 2009, 17(3):321-324.(in Chinese)
[14］高金霞, 赵卫刚, 郑腾. 侵彻战斗部装药抗过载技术研究[J]. 火工品, 2008(4): 4-7.
GAO J X, ZHAO W G, ZHENG T. Study on the anti-overloading technique for penetrating warhead charge[J]. Initiators & Pyrotechnics, 2008(4): 4-7.(in Chinese)
[15］李媛媛, 高立龙, 李巍, 等. 抗过载炸药装药侵彻安全性试验研究[J]. 含能材料, 2010, 18(6):702-705.
LI Y Y, GAO L L, LI W, et al. Experiment research on security of insensitive explosive charge during penetration[J]. Chinese Journal of Energetic Materials, 2010, 18(6):702-705.(in Chinese)
[16］李媛媛, 王晓峰, 高立龙, 等. 炸药装药侵彻靶板过程的点火机制分析[J]. 四川兵工学报, 2013, 34(12):24-26.
LI Y Y, WANG X F, GAO L L, et al. Initiation mechanism of explosive charge during target penetration[J]. Journal of Sichuan Ordnance, 2013, 34(12):24-26. (in Chinese)
［17］魏强, 黄西成, 陈刚, 等. 高聚物粘结炸药动态损伤破坏的数值刻画［J］. 兵工学报, 2019, 40(7):1381-1389.
WEI Q, HUANG X C, CHEN G, et al. Numerical characterization of dynamic damage of PBX explosive［J］. Acta Armamentarii, 2019, 40(7):1381-1389. (in Chinese)

［18］蔡宣明, 张伟, 徐鹏, 等. 一维应力动态加载下战斗部装药力学响应预报模型［J］. 兵工学报, 2019, 40(4):762-768.
CAI X M, ZHANG W, XU P, et al. Prediction model of mechanics response of warhead charge under one-dimensional stress dynamic losding［J］. Acta Armamentarii, 2019, 40(4):762-768. (in Chinese)
[19］张馨予, 吴艳青, 黄风雷, 等. PBX装药弹体侵彻混凝土薄板的数值模拟[J]. 含能材料, 2018, 26(1):101-108.
ZHANG X Y, WU Y Q, HUANG F L. Numerical simulation on the dynamic damage of PBX charges filled in projectiles during
penetrating thin concrete targets[J]. Chinese Journal of Energetic Materials, 2018, 26(1):101-108.(in Chinese)
[20］ YANG K, WU Y Q, HUANG F L. Numerical simulations of microcrack-related damage and ignition behavior of mild-impacted polymer bonded explosives[J]. Journal of Hazardous Materials, 2018, 356(15):34-52.
[21］成丽蓉. 典型PBX炸药损伤及对装药安全性影响机制研究[D]. 北京: 清华大学, 2015.
CHENG L R. Study on mechanisms of a PBX charge stability under impact damage[D]. Beijing:Tsinghua University,2015.(in Chinese)
[22］ BENNETT J G, HABERMAN K S, JOHNSON J N, et al. A constitutive model for the non-shock ignition and mechanical response of high explosives[J]. Journal of the Mechanics and Physics of Solids, 1998, 46(12):2303-2322.
[23］陈广南. 固体火箭发动机机械撞击载荷作用下安全性研究[D]. 长沙: 国防科学技术大学, 2005.
CHEN G N. The study on safety analysis of solid rocket motor under mechanical impact[D]. Changsha: National University of Defense Technology, 2005.(in Chinese)
[24］ WHITWORTH N J. Simple one-dimensional model of ‘hot-spot’ formation in heterogeneous solid explosives[D]. Cranfield, Bedfordshire, UK: Cranfield University, 1999.
[25］ CHENG L R, CHEN R, SHI H J, et al. The pore collapse “hot-spots” model coupled with brittle damage for solid explosives[J]. Shock and Vibration, 2014, 2014:972414.

第41卷第1期
2020 年1月兵工学报ACTA
ARMAMENTARIIVol.41No.1Jan.2020