Depth of Penetration and Its Influence Factors of Long Rod Projectile Impacting on Semi Infinite Target with Elevated Velocity

Hypervelocity penetration is an important issue for a weapon designer and protection engineering experts.With the increase of the impact velocity, a projectile may transition into a fluid penetration phase, and its depth of penetration (DOP) no longer rises monotonously with the velocity.Numerical simulation of the penetration processes of a long rod projectile at an elevated impact velocity was performed to analyze the variation and influencing factors of the transition point.Influences of the hardness, nose shape, material of the projectile and the target on the transition point of DOP were simulated.The simulation results show that, with the increase of the impact velocity, the DOP increases at first and then decreases at a certain velocity (called the transition velocity).The velocity of the transition point improves with the increase of the projectile's hardness.The Ogive-headed projectile has a higher transition point than the spherical-headed projectile.Moreover, the projectile/target material also has significant effects on the transition point.