大质量弹丸高速侵彻混凝土质量侵蚀试验研究

An experimental study on mass erosion for high speed and high mass projectile penetrate concrete

动能弹在高速侵彻混凝土目标时产生的质量侵蚀是引起侵彻效率降低的重要原因,该文开展了质量约为20 kg、直径为100 mm的高硬度弹丸以近1.0 km/s的速度侵彻C40混凝土的试验研究,对弹丸侵蚀参数和头部卵型段的变化进行了详细的描述,并对大质量弹丸的侵蚀机理进行了分析,通过计算得到了热熔侵蚀和切削侵蚀的占比。结果表明:在侵彻过程中,当不同质量弹丸以相同的初速撞击同等强度混凝土时,弹丸表面压力受弹丸质量影响,当高于某临界速度时,随着弹丸质量的增加而增大;弹丸侵彻混凝土时的质量侵蚀与弹丸质量有关,弹丸质量较小时侵蚀现象更明显。切削侵蚀占比随弹丸硬度提高而降低,提高弹丸材料硬度对降低大质量弹丸的质量侵蚀效果更加明显。

The mass erosion of kinetic energy projectile penetrating concrete target at high speed is an important reason for the reduction of penetration efficiency.The experiments of high hardness projectile with a mass of 20 kg and a diameter of 100 mm penetrating into C40 concrete at a speed of nearly 1.0 km/s were conducted in this paper.The erosion parameters of the projectile and the changes in the nose were described,and the erosion mechanism of the large mass projectile was analyzed.The proportion of melting erosion and cutting erosion was calculated.The results show that when different projectiles penetrate the same concrete strength at the same initial velocity,the surface pressure of the projectile nose is affected by the weight of the projectile.When the velocity is larger than critical velocity,the surface pressure increases with projectile weight.The mass erosion caused by projectile penetration into concrete is related to the weight of the projectile,and the erosion phenomenon is more pronounced when the projectile weight is smaller.The proportion of cutting erosion decreases with projectile hardness,and increasing the material hardness of the projectile has more significant effect on reducing the mass erosion for the large mass projectiles.