侵彻双层靶板过程中PBX装药的宏-细观损伤数值模拟研究  

Numerical Simulation Study on Macro-Microscopic Damage of PBX Charge during Penetration of Double-Layer Targets

作　　者：张晓微 赵河明[1] 郑晓波 张巧 王志军[1] 肖有才 ZHANG Xiaowei;ZHAO Heming;ZHENG Xiaobo;ZHANG Qiao;WANG Zhijun;XIAO Youcai(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,Shanxi,China;Institute of Fluid Physics,CAEP,Mianyang 621999,Sichuan,China)

机构地区：[1]中北大学机械与动力工程学院,山西太原030051 [2]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《高压物理学报》2024年第6期109-118,共10页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(11802273,12372368);山西省基础研究面上项目(202303021211142);国防科工局基础科研重点项目(JCKY2017207B055)。

摘　　要：针对高速战斗部侵彻双层目标时装药的损伤问题,基于内聚力模型开展了PBX装药战斗部侵彻双层靶板的数值模拟研究。采用内聚力模型计算装药损伤的出现与演化,分析了侵彻速度与损伤发生的关系,通过损伤比对侵彻结束后PBX装药的损伤进行了量化,建立了PBX装药细观损伤仿真模型,研究了侵彻双层靶板过程中PBX装药细观损伤机制。结果表明:当弹体垂直侵彻双层靶板时,在压-拉反复作用下,装药尾部形成了垂直于加载方向的贯穿裂纹,且装药的损伤程度随着侵彻速度的增大而增大;在侵彻双层靶板过程中,PBX装药的主要损伤模式是界面脱粘,微裂纹最先出现在颗粒边角处,并且逐渐增多,最终界面微裂纹失稳扩展并汇聚为连续的主裂纹。To study the charge damage evolution process when a high-velocity warhead penetrated a double-layer target,a numerical simulation study was conducted using a cohesive zone model to investigate the penetration of double-layer target.The cohesive zone model was utilized to calculate the occurrence and evolution of PBX damage,as well as to analyze the relationship between the penetration velocity and damage evolution.The quantification of damage was conducted by means of the damage ratio.Furthermore,a micro-damage finite element model for PBX was established to examine the microscopic damage mechanisms during penetration into a double-layer target.The results show that when the projectile penetrates the target plate vertically,the extent of damage of the charge increases with the increase of penetration velocity.From a microscopic perspective,it was observed that cyclic tensile and compressive loads induced the formation of vertical cracks perpendicular to the loading direction.The primary mechanism of damage in PBX charge penetration into double-layer target is interface debonding.Additionally,the microcracks destabilize,propagate,and converge into a continuous main crack.

关 键 词：双层靶板 PBX装药 内聚力模型 宏-细观损伤模拟 微裂纹 

分 类 号：O381[理学—流体力学] O521.9[理学—力学]