Study on Plastic Penetration Behavior and Penetration Model of Spherical Tungsten Alloy Projectile

Abstract—: The plastic deformation of the spherical tungsten alloy projectile during penetration results in the change of penetration rule. To accurately calculate the penetration depth of the projectile into the low carbon steel target, the concept of projectile shape coefficient was introduced according to the shape of the experimentally recovered projectile, and the deformation penetration process of the projectile was simplified into the rigid penetration process with different shape coefficients at different impact velocities. The rigid penetration model of the spherical, ellipsoidal, and truncated sphere projectile was constructed. The calculation results show that the accuracy of the three models is close to each other. On this basis, the heat map analysis method is used to correlate the impact velocity with the projectile shape coefficient, and a piecewise calculation model of the penetration depth of the spherical projectile is constructed. The error between calculation results and experiment results is less than 10%.