爆炸冲击作用下金属圆柱壳体膨胀破碎过程研究  

Research on Expansion and Fracture Process of Cylindrical Metal Shell Under Explosion Shock

作　　者：郭光全 朱建军[2] 姚文进[2] 李文彬[2] GUO Guangquan;ZHU Jianjun;YAO Wenjin;LI Wenbin(Jinxi Industries Group Co.Ltd.,Taiyuan 030027,China;ZNDY of Ministerial Key Laboratory,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]晋西工业集团有限责任公司,山西太原030027 [2]南京理工大学智能弹药技术国防重点学科实验室,江苏南京210094

出　　处：《弹道学报》2018年第3期73-77,共5页Journal of Ballistics

摘　　要：为了研究爆轰冲击作用下金属圆柱壳体动态膨胀及变形断裂过程,以40Cr Mn Si B钢壳体材料为研究对象,在理论分析的基础上建立了炸药与壳体相互作用过程分析模型,获得了爆轰作用过程中金属壳体外表面径向位移以及速度变化规律;应用超高速摄影技术获得了壳体在高应变率下动态变形过程。结果表明:膨胀半径达到初始外半径的1.47~1.70倍时,壳体内部裂纹贯穿整个壁厚并发生断裂;壳体膨胀速度在距起爆端60%~70%壳体轴向长度处达到最大,此处膨胀速度比起爆端附近提高了18.3%。To study the dynamic expansion,deformation and fracture process of cylindrical metal shell under explosion shock,the cylinder shells fabricated from 40CrMnSiB steel was selected as the study object.The model of interaction between the explosive and the shell was established,and the variation of radial displacement and velocities of outer-wall from the shell was obtained.The ultra-high speed photographic technology was applied to study the dynamic deformation process of shell at high strain-rates.The result shows that,the shell is in the fracture phase wherein cracks penetrate the entire casing wall while the expansion radius is within the range 1.47~1.70 times of the initial outer radius.The expansion velocity of shell away from initiation point about 60%~70%shell axial-length reaches the maximum wherein the velocity increases by 18.3%compared to expansion velocity of the initiation end.

关 键 词：爆炸冲击 高应变率 膨胀 断裂 超高速摄影 

分 类 号：O38[理学—流体力学]