Numerical Simulation of Dynamic Brazilian Test of Polymer Bonded Explosive Simulant Based on Cohesive Crack Model

doi:10.3969/j.issn.1000-1093.2016.09.013

Abstract

Abstract: Polymer bonded explosive (PBX) is the key component of warhead. The dynamic behaviors of PBX, especially dynamic fracture behavior, are crucial issues on the safety and reliability of warhead. By introducing cohesive crack model (CCM), the dynamic explicit software LS-DYNA is used to simulate the dynamic Brazilian experiment on polymer bonded explosive simulant (PBX-M). By comparing with time history of tensile stress obtained by the strain gauge glued on the Hopkinson bar, the displacement fields and strain fields obtained by digital image correlation and high-speed camera, it is found that the tensile stress peak value obtained by numerical simulation is 5% smaller than the experimental result, and the deviation of the concentration zone of tensile strain from experimental data is less than 15%. Thus the validity of CCM is confirmed. The law of crack initiation and propagation of PBX-M sample during dynamic Brazilian experiment is studied from the results of numerical simulation. The quantitative information about crack width in sample is given.

Key words: ordnance science and technology, cohesive crack model, dynamic Brazilian experiment, polymer bonded explosive, digital image correlation method

CLC Number:

CUI Yun-xiao, CHEN Peng-wan, David A. Cendón, DAI Kai-da, ZHONG Fang-ping. Numerical Simulation of Dynamic Brazilian Test of Polymer Bonded Explosive Simulant Based on Cohesive Crack Model[J]. Acta Armamentarii, 2016, 37(9): 1639-1645.

References

［1］陈鹏万，黄风雷. 含能材料损伤理论及应用［M］. 北京: 北京理工大学出版社, 2006.
CHEN Peng-wan, HUANG Feng-lei. Damage theory and application of energetic materials［M］. Beijing: Beijing Institute of Technology Press, 2006. (in Chinese)
［2］陈鹏，卢芳云，覃金贵，等. 含钨活性材料动态压缩力学性能［J］. 兵工学报, 2015, 36(10): 1861-1866.
CHEN Peng， LU Fang-yun， QIN Jin-gui， et al. Dynamic compressive mechanical properties of tungstenic reactive material［J］. Acta Armamentarii, 2015, 36(10): 1861-1866. (in Chinese)
［3］ Grantham S G, Siviour C R, Proud W G et al. High-strain rate Brazilian testing of an explosive simulant using speckle metrology［J］. Measurement Science and Technology, 2004, 15(9): 1867-1870.
［4］ Palmer S J, Field J E, Huntley J M. Deformation, strengths and strains to failure of polymer bonded explosives ［J］. Proceedings of the Royal Society A: Mathematical Physical and Engineering Sciences, 1993, 440(1909): 399-419.
［5］ Siviour C R, Williamson D M, Grantham S G, et al. Split Hopkinson bar measurements of PBXs［C］∥Proceedings of the Conference of the American Physical Society, Topical Group on Shock Compression of Condensed Matter. Melville, NY:the American Physical Society, 2004: 804-807.
［6］周忠彬, 陈鹏万, 黄风雷. 高聚物粘结炸药模拟材料动态变形破坏的实验研究［J］. 兵工学报, 2010, 31(增刊1): 288-292.
ZHOU Zhong-bin, CHEN Peng-wan, HUANG Feng-lei. Experimental study on dynamic deformation and fracture of polymer bonded explosive simulant ［J］. Acta Armamentarii, 2010, 31(S1): 288-292. (in Chinese)
［7］赵四海. 用粘弹性统计裂纹模型模拟高能炸药的力学响应和非冲击点火［D］. 长沙: 国防科学技术大学, 2011.
ZHAO Si-hai. A viscoelastic statistic crack constitutive model for mechanical response and the non-shock ignition of high explosives［D］. Changsha: National University of Defense Technology, 2011. (in Chinese)
［8］傅华，李俊玲，谭多望. PBX炸药动态Brazilian试验及数值模拟研究［J］. 高压物理学报, 2012, 26(2): 148-154.
FU Hua, LI Jun-ling, TAN Duo-wang. Dynamic Brazilian test and simulation of plastic-bonded explosives［J］. Chinese Journal of High Pressure Physics, 2012, 26(2): 148-154. (in Chinese)
［9］ Guo H, Luo J R, Shi P A. Research on the fracture behavior of PBX under static tension［J］. Defence Technology, 2014, 10(2): 154-160.
［10］张振亚，麻鸳鸳，周风华. 脆性聚甲基丙烯酸甲酯板动态裂纹传播有限元模拟［J］. 兵工学报, 2014, 35(6): 872-878.
ZHANG Zhen-ya, MA Yuan-yuan， ZHOU Feng-hua. Finite element simulation of dynamic crack propagation in brittle PMMA plates［J］. Acta Armamentarii, 2014,35(6): 872-878. (in Chinese)
［11］ Planas J, Elices M, Guinea G V, et al. Generalizations and specializations of cohesive crack models ［J］. Engineering Fracture Mechanics, 2003, 70(14): 1759-1776.
［12］ Sancho J M, Planas J, Cendón D A, et al. An embedded crack model for finite element analysis of concrete fracture ［J］. Engineering Fracture Mechanics, 2007, 74(1): 75-86.
［13］ Reyes E, Gálvez J C, Casati M J, et al. An embedded cohesive crack model for finite element analysis of brickwork masonry fracture［J］. Engineering Fracture Mechanics, 2009, 76(12): 1930-1944.
［14］ Zhou Z B, Chen P W, Duan Z B. Comparative study of the fracture toughness determination of a polymer-bonded explosive stimulant ［J］. Engineering Fracture Mechanics, 2011, 78(17): 2991-2997.

[1]	MAO Ming, WANG Jian-bing. Research on Influence of Breakwater on Hydrodynamic Characterisitics of Displacement Amphibious Vehicles [J]. Acta Armamentarii, 2016, 37(9): 1553-1560.
[2]	GAO Jun-qiang, TANG Xia-qing, HUANG Xiang-yuan, CHENG Xu-wei. FEA Method for Analysis of SINS Error Caused by Vibration Isolation System [J]. Acta Armamentarii, 2016, 37(9): 1570-1577.
[3]	NI Yan-jie， CHENG Nian-kai, JIN Yong， YANG Chun-xia， LI Hai-yuan， LI Bao-ming. Numerical Simulation on Pressure Wave in a 30mm Electrothermal-chemical Gun [J]. Acta Armamentarii, 2016, 37(9): 1578-1584.
[4]	LU Ye, ZHOU Ke-dong, HE Lei, LI Jun-song, HUANG Xue-ying. Research on Influence of Muzzle Brake Efficiency on a New Large Caliber Machine Gun Based on Floating Principle [J]. Acta Armamentarii, 2016, 37(9): 1585-1591.
[5]	LIU Guo-qing， XU Cheng. The Study of Bullet-Barrel Matching Design Method of High Precision Sniper Rifle [J]. Acta Armamentarii, 2016, 37(9): 1592-1598.
[6]	LI Zhen-xiao， ZHANG Ya-zhou， NI Yan-Jie， LI Bao-ming. Analysis on the Influence of Turn-off Characteristics of Thyristor on Augmented Railgun [J]. Acta Armamentarii, 2016, 37(9): 1599-1605.
[7]	HU Ming, WANG Jiong, WU Xiao-lang. Estimation Method for Storage Life of Magnetorheological Fluid Fuze Arming Device [J]. Acta Armamentarii, 2016, 37(9): 1606-1611.
[8]	ZHOU Peng， CAO Cong-yong， DONG Hao. Analysis of Interior Ballistic Characteristics and Muzzle Flow Field of High-pressure Gas Launcher [J]. Acta Armamentarii, 2016, 37(9): 1612-1616.
[9]	ZHAO Xue-wei， YU Yong-gang， MANG Shan-shan. Influence of Injection Pressure Change on Expansion Characteristics of Pulsed Plasma Jet [J]. Acta Armamentarii, 2016, 37(9): 1617-1623.
[10]	LIN Xiang-yang, LI Han, ZHENG Wen-fang, PAN Ren-ming. Formation Mechanism of Pore Structure of Ball Propellant with Micro-pores Made by Double Emulsion Method [J]. Acta Armamentarii, 2016, 37(9): 1633-1638.
[11]	CAO Hao-zhe， WU Yan-xuan， ZHOU Feng， WANG Zheng-jie. Research on Containment Control of Second-order Nonlinear Multi-agent with Collision Avoidance Mechanism [J]. Acta Armamentarii, 2016, 37(9): 1646-1654.
[12]	LOU Li, FAN Jian-hua, XU Cheng. Research on Topologically Optimized Anti-jamming Technology for Tactical MANETs [J]. Acta Armamentarii, 2016, 37(9): 1662-1669.
[13]	LIU Wei-dong, CHENG Rui-feng, GAO Li-e, ZHANG Jian-jun. Cooperative Engagement-based Differential Guidance Law for Underwater Interceptor [J]. Acta Armamentarii, 2016, 37(9): 1684-1691.
[14]	DAI Yong, QIAN Lin-fang, WU Xiao-jin, XU Ya-dong. Analysis about Thermal-structure Coupling Effect of High Firing Rate Automatic Mechanism of a Gun [J]. Acta Armamentarii, 2016, 37(9): 1738-1743.
[15]	LI Hai-guang， PAN Hong-xia， REN Hai-feng. Crack Fault Diagnosis of Automatic Mechanism Based on Shock Response Spectrum Features Extraction [J]. Acta Armamentarii, 2016, 37(9): 1744-1752.