The effects of compressibility and strength on penetration of long rod and jet

作     者：Weng-jie Song Xiao-wei Chen Pu Chen 

作者机构：Department of Mechanics and Engineering ScienceCollege of EngineeringPeking UniversityBeijing 100871China Centre for Applied Physics and Technology(CAPT)Peking UniversityBeijing 100871China State Key Lab of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2018年第14卷第2期

页      面：99-108页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 0826[工学-兵器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0703[理学-化学] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Outstanding Young Scientist Foundation of China(11225213) the Key Subject “Computational solid mechanics” of China Academy of Engineering Physics 

主　　题：Compressibility Strength Long rod Jet Compressible model Virtual origin model 

摘      要：The approximate compressible model is adopted to study the effects of strength and compressibility on the penetration by WHA long rod and copper jet into semi-infinite target in detail. For WHA rod penetrating PMMA at 2 km/s V 5 km/s, the compressibility has a significant effect on the penetration efficiency. We clarify how compressibility affects the penetration efficiency by changing the stagnation pressures of the rod and target. For WHA rod penetrating 4340 Steel and 6061-T6 Al at 2 km/s V 10 km/s, the effect of strength is strong and the effect of compressibility is negligible at lower impact velocity, whilst the effect of strength is weak and the effect of compressibility becomes stronger at higher impact velocity. For the copper jet penetrating 4030 Steel, 6061-T6 Al and PMMA. the virtual origin model is adopted, and the compressibility and strength are implicitly considered by the linear relation between the penetration velocity and impact velocity. The effects of compressibility and target resistance on penetration efficiency are studied. The results show that the target resistance has a significant effect on the penetration efficiency. Howver PMMA is much more compressible than copper and the huge difference of compressibility has a significant effect on the penetration by hypervelocity copper jet into PMMA.