12.7 mm动能弹斜侵彻复合装甲的数值模拟研究

Numerical simulation study on penetration of a 12.7 mm kinetic energy bullet into a composite armor

通过弹道枪实验对斜置角度为0°~60°的陶瓷复合装甲进行了弹道极限测试,分析了靶板斜置角度对穿燃弹的弹道极限和钢芯质量变化、破坏形态的影响。利用数值模拟的方法对上述实验结果进行验证计算,鉴于数值计算结果与实验结果较好的一致性,进一步研究了陶瓷复合靶板斜置角度对穿燃弹钢芯穿靶偏移角和等效Q235钢靶厚度的影响。结果表明,随陶瓷复合靶板斜置角度的增大:弹道极限近似指数型提高;在相同弹道极限速度下,穿燃弹对Q235钢靶板的极限穿深和对斜置陶瓷复合靶板的极限穿深的等效厚度的比也随之增大;同时,钢芯完整度逐渐降低,穿靶偏移角反向增大。

Ballistic limit tests were carried out by using a ballistic gun system for the ceramic composite armors obliquely placed with the angles of 0°−60°.The influences of the oblique angles were analyzed on the ballistic limits,steel core mass change and damage forms of armor-piercing bullets.The numerical simulations were performed to verify the above experimental results.Based on the fact that the calculated results were in agreement with the experimental ones,the influences of the oblique angles were further explored on the deflection angles of the bullet steel cores penetrating through the target plates,and the thicknesses of the equivalent Q235 steel target plates.Results show that with increasing the oblique angles of the ceramic composite targets:(1)the ballistic limit obeys an exponential increase law;(2)at the same ballistic limit,the ratio of the limit penetration depth of the Q235 steel target plate by the armor-piercing bullet to the equivalent thickness of the limit penetration depth of the obliquely-placed ceramic composite target by the armor-piercing bullet increases;(3)the integrity of the bullet steel core decreases gradually,its deflection angle increases reversely.