摘要
针对12.7 mm穿燃弹对半无限厚均质各向同性软钢靶的侵彻行为,采用12.7 mm弹道枪进行了多发垂直侵彻Q235半无限钢靶的弹道试验。试验结果表明:12.7 mm穿燃弹对Q235半无限钢靶的侵彻过程中弹芯无明显变形,表现为刚性侵彻,侵彻深度与弹芯的着靶动能呈线性关系。利用LS-DYNA有限元软件对12.7 mm穿燃弹的侵彻过程进行了数值模拟研究,数值模拟结果与试验结果有较好的一致性,得到了弹丸的侵彻阻力曲线,发现弹丸的侵彻阻力在弹芯着靶前为最大侵彻阻力的5%,弹芯着靶瞬间弹丸的侵彻阻力迅速增大,说明弹芯在12.7 mm穿燃弹对Q235半无限钢靶的侵彻过程中为主要侵彻元。数值仿真过程中,将穿燃弹的着靶动能等效为弹芯的着靶动能时,弹芯的侵彻深度比试验侵彻深度高约40%;将穿燃弹的着靶速度等效为弹芯着靶速度时,侵彻深度与试验相差在1%以内,进一步说明了穿燃弹对Q235半无限钢靶侵彻时弹芯为主要侵彻元。将穿燃弹的侵彻模型简化为刚性弹芯的侵彻模型,在空腔膨胀理论的基础上建立了12.7 mm穿燃弹芯刚性侵彻时的深度预测公式。
In order to study the penetration behavior of 12.7 mm penetrator into semi-infinite homogeneous isotropic mild steel target,the test of multiple vertical penetration into Q235 semi-infinite target was carried out.Test results show that there is no obvious deformation in core during the penetration,which shows rigid penetration,and the penetration depth has a linear relationship with impact kinetic energy.The LS-DYNA was used to simulate the penetration process.The simulation results are in good agreement with test.The penetration resistance curve of the penetrator was obtained.The penetration resistance is 5%of the maximum penetration resistance before the core impacts target,and the penetration resistance increases rapidly when the core impacts target.It shows that the core is the main penetration component.In simulation,when impact kinetic energy of penetrator is equivalent to impact kinetic energy of the core,the penetration depth of the core is about 40%higher than the test;when impact velocity of the penetrator is equivalent to impact velocity of the core,the difference between penetration depth and test is less than 1%,which further proves that the core is the main penetration component.The penetration model of penetrator was simplified to the penetration model of rigid core,and the depth prediction formula of rigid penetration of 12.7 mm penetrator core was established based on the cavity expansion theory.
作者
李烨
马铭辉
蒋招绣
王晓东
任文科
高光发
LI Ye;MA Minghui;JIANG Zhaoxiu;WANG Xiaodong;REN Wenke;GAO Guangfa(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Key Laboratory of Impact and Safety Engineering of Ministry of Education,Ningbo University,Ningbo 315211,China)
出处
《弹道学报》
CSCD
北大核心
2022年第1期51-57,共7页
Journal of Ballistics
基金
国家自然科学基金项目(12172179,11772160,11472008)
冲击与安全工程教育部重点实验室开放基金项目(CJ202006)。
关键词
穿甲力学
穿燃弹
刚性侵彻
perforation mechanics
penetrator
rigid penetration
