射弹冲击下带预裂槽金属靶的防护性能研究（英文）  

Resistance Performance of Grooved Metal Target Subjected to Projectile Impact

作　　者：童宗保[1,2] 王金相[1] 梁丽 钱吉胜[1] 唐奎[1] 

机构地区：[1]南京理工大学瞬态物理重点实验室,江苏南京210094 [2]江南工业集团有限公司,湖南湘潭411207 [3]晋西工业集团有限公司,山西太原030027

出　　处：《高压物理学报》2017年第2期103-113,共11页Chinese Journal of High Pressure Physics

基　　金：National Natural Science Foundation of China(11272158,11672138);Foundation of Science and Technology on Transient Physics Laboratory(9140C300405150C30005)

摘　　要：采用弹道实验和数值模拟的方法研究了带环形预裂槽的金属靶在射弹冲击下的毁伤模式和防护性能,分析了弹头形状、预裂槽直径及深度等因素对靶板防护性能的影响。结果表明:对带有环形预裂槽的金属靶板,存在两种主要毁伤模式,即环形槽内部的侵彻和环形槽底的冲击断裂;临界毁伤速度与毁伤模式密切相关,随着环形槽深度的增大或半径的变小,临界毁伤速度变小;与尖头弹相比,平头弹的临界毁伤速度更小;微观分析表明,在射弹冲击作用下,环形槽底部产生绝热剪切带,更容易形成充塞剪切破坏。The damage modes and resistance performance of the annular pre-cut metal target impacted by the projectile were studied by experiments and numerical simulation.Influences of the projectile nose shape,the diameter as well as the depth of the annular groove on the resistance performance of the target were analyzed.The results show that there exist two kinds of damage modes for the target with an annular groove,one being the penetration of the inner part of the groove and the other the fracture along the bottom of the annular groove.The critical damage velocity（CDV）is closely related to the damage modes of the target.Generally,the grooved target was easier to be damaged than the intact one.The CDV decreases with the increase of the annular groove depth while it goes up with the increase of the annular groove diameter.Compared with the oval nose projectile,the CDV of the target is smaller for the flat nose projectile.The microscopic analysis shows that when the adiabatic shear band is formed inside the target,the plug is easier to be formed and the target is easier to be damaged.

关 键 词：刻槽金属靶 防护性能 弹头形状 毁伤模式 绝热剪切带 

分 类 号：O385[理学—流体力学]