摘要
开展了弹体侵彻预损伤花岗岩靶体试验,获得了不同弹体初速下弹体侵彻预损伤花岗岩靶体数据,建立了弹体侵彻预损伤有限厚岩石靶体数值模拟模型,对比了侵彻过程中岩石靶体损伤演化及裂纹拓展规律,结果表明:通过小口径聚能装药对岩石靶体进行预损伤可大幅提升30mm弹体对目标的侵彻能力,侵彻深度增长率随弹体初始速度线性减小;30mm弹体侵彻半无限花岗岩靶体时,预损伤靶体内裂纹条数更少且裂纹长度更短,空腔周围完全损伤区直径约为完整靶体的1/2,裂纹延展宽度约为0.3倍靶体直径;30mm弹体侵彻200mm厚花岗岩靶体时,靶体材料的完全损伤区直径同样约为完整靶体的1/2,但预损伤靶体内向靶面延伸的径向裂纹远少于完整靶体,向靶背延伸的径向裂纹数量与完整靶体相近,且完整与预损伤靶体中裂纹延展宽度均为靶体直径的0.5倍.
The projectile penetration pre-damage granite target test was conducted,and disparate projectile initial velocity projectile penetration pre-damage granite target data was obtained.Subsequently,a projectile penetration pre-damage finite-thickness rock target numerical simulation model was established,and a com-parison was made between the penetration process of the rock target damage evolution and crack expansion law.The findings indicate that the pre-damage of the rock target by the shaped charge can greatly improve the penet-ration ability of the 30 mm projectile on the target,and the penetration depth growth rate decreases linearly with the initial velocity of the projectile;when the 30 mm projectile penetrates the infinite granite target,the number of cracks within the pre-damaged target is fewer,the length of the cracks is shorter,the diameter of the com-pletely damaged area around the cavity is about 1/2 of the complete target,and the width of the cracks extends to 0.3 times the target diameter.When the 30 mm projectile penetrates the 200 mm thick granite target,the diamet-er of the completely damaged area of the target material is also about 1/2 of the complete target,but the radial cracks extending to the target surface in the pre-damaged target are far fewer than those in the complete target,and the number of the radial cracks extending to the back of the target is similar to that in the complete target,and the extended width of the cracks in the complete and pre-damaged target is 0.5 times of the diameter of the target.
作者
董建才
张先锋
刘闯
沈陶然
梁俊宣
DONG Jiancai;ZHANG Xianfeng;LIU Chuang;SHEN Taoran;LIANG Junxuan(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu 210094,China)
出处
《北京理工大学学报》
北大核心
2025年第10期1053-1063,共11页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(12141202)。
关键词
花岗岩靶体
串联侵彻
数值模拟
裂纹演化
granite target
tandem penetration
numerical simulation
crack evolution
作者简介
董建才(2001—),男,硕士生,E-mail:dxx_millet@163.com;通信作者:张先锋(1978—),男,博士,教授,E-mail:lynx@njust.edu.cn.
