2-3km/s初速下圆形破片对金属薄靶的侵彻效应分析

针对2 ～3 km/s初速条件下破片对金属薄靶的侵彻开展了实验和数值模拟研究,用LS-DYNA软件对该速度段下弹丸侵彻金属靶板的过程进行数值模拟,采用爆轰驱动装置发射钢质球形弹丸进行试验研究.分析了不同工况下靶板的毁伤模式,并与600 ～ 800 m/s这一低速段下靶板的毁伤模式进行对比分析.结果表明:数值模拟跟实验吻合较好,在该速度段下,球形钢质弹丸对靶板的毁伤模式主要为穿孔;垂直撞击时在靶板上形成延性扩孔,而在低速度段下,靶板上形成的穿孔直径几乎跟弹丸直径一样,没有形成延性扩孔;垂直侵彻时在钢靶上形成的扩孔直径比在铝靶上形成的扩孔直径大.

Analysis of the effect of the circle fragment penetration the tine metal target with the initial velocity between 2km/s and 3km/s

With the initial velocity of the fragment between 2km/s and 3km/s penetration the thin metal target was studied in this paper with the experiment and simulation. Using LS-DYNA software to simulate the process of projectile penetrate the metal target in this speed segment. We can use detonation driver to launch the spherical projectile for experiment research. Analysis of the damage model under different condition and compare with the low speed between 600m/s and 800m/s, then analysis the differences. The result shows that the numerical simulation and experiment have a good agreement. In this speed segment the spherical steel projectile damage the target mainly by penetration. When the projectile vertical impacted the target, the ductility hole was formed on the target. But when in low speed segment, perforation diameter formed on the target was almost the same as the diameter of the projectile, there was no formed ductility hole. The formation hole diameter in the steel target was larger than the hole diameter in the aluminum target when the projectile vertical penetration.