叠层顺序对双层A3钢薄板抗侵彻性能的影响

Influences of layer order on ballistic resistance of double-layered thin A3 steel plates

在轻气炮上进行了卵形头、平头及半球形头杆弹正撞击等厚接触式双层靶的实验,得到了这几种结构的剩余速度-初始速度曲线及弹道极限速度,研究了叠层顺序对靶体抗侵彻性能的影响。实验表明:叠层顺序对双层靶体抗侵彻性能的影响与弹体头部形状密切相关。对于平头和半球形头弹,厚板在前、薄板在后的靶体的弹道极限速度高于相反叠层顺序的靶体的弹道极限速度;但是对于卵形头弹,薄板在前、厚板在后的靶体的弹道极限速度高于相反叠层顺序的靶体的弹道极限速度。叠层顺序对靶体弹道极限速度的影响主要通过改变靶板的失效形式和靶板间的作用力实现。

The double-layered thin A3 steel plates were normally impacted by the ogival-,blunt-and hemispherical-nosed projectiles with the help of a gas gun to investigate the influences of layer order on the ballistic resistance and failure mode of the targets.And the residual and initial velocities of the projectiles were measured and the corresponding ballistic limit velocities were obtained by least square fitting the Recht-Ipson formula to the measured residual and initial velocities.The experimental data reveal that the effects of layer order on the ballistic resistance are dependent on the projectile nose shapes.For the blunt-and hemispherical-nosed projectiles,the double-layered plates with a thick front plate and a thin back plate can give greater resistance than the ones with the opposite layering order.However,for the ogival-nosed projectiles,the double-layered plates with a thin front plate and a thick back plate exhibit greater resistance than the ones with the opposite layer order.The influences of layer order on the ballistic resistance result from the transition of the failure modes and the interference force between different configuration targets.