一种考虑球体变形的钨球侵彻低碳钢深度计算模型

A Calculation Modelfor Penetration Depth of Tungsten Ball against Low-carbon Steel Considering Sphere Deformation

为了研究钨球在高速撞击下的变形行为对侵彻效果的影响,对钨球侵彻半无限低碳钢靶进行试验研究,得到<1600 m/s冲击速度下钨球变形特征和靶板侵彻深度随冲击速度的变化规律。在此基础上构建钨球侵彻塑性变形模型。将钨球变形模型和球形空腔膨胀阻力模型相结合,建立钨球变形侵彻深度计算模型。对比不同撞击速度下钨球变形侵彻模型、刚性侵彻模型的计算结果。对比结果表明,变形侵彻模型能够更加准确地计算钨球对半无限靶的侵彻深度,计算结果与试验相比最大误差20%(正误差15%,负误差5%),精度较刚性侵彻模型提升42.86%。

In order to study the influence of deformation behavior of tungsten ball on penetration effect under high-speed impact,the penetrationof tungsten ball into a semi-infinite low-carbon steel target is experimentally studied,and the deformation characteristics of tungsten ball and the change rule of penetration depth versus impact velocity of target plate at 1600 m/s are obtained through experiment.On this basis,a plastic deformation model of tungsten ball is constructed.A calculation model of tungsten ball deformation penetration depth is established by combining the projectile deformation model with the spherical cavity expansion resistance model.The calculated results of the tungsten ball deformable penetration model and the rigid penetration model at different impact velocities are compared.The results show that the deformable penetration model can be used to more accurately calculate the penetration depth of tungsten ball into the semi-infinite target.The maximum error between the calculated results and test results is 20%(the positive error is 15%and the negative error is 5%),and the calculation accuracy of the deformable penetration model is 42.8%higher than that of the rigid penetration model.