一种考虑球体变形的钨球侵彻低碳钢深度计算模型

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 1 600 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.