A calculation of penetration resistance during cratering for ogive-nose projectile into concrete

Penetration experiments were conducted to explore an expression formula for the stress endured by the nose of the projectile during cratering. To obtain the relation between penetration velocity and penetration depth, the relation between penetration depth and time was recorded by using a high-speed camera. And the least square method was used to analyze the relation of the kinetic energy consumed by the projectile with the penetration depth at the end of cratering. Thereby, an expression formula was proposed for the stress endured by the nose of the projectile during cratering. The calculation results display that the proposed stress formula can describe the relation between the penetration velocity and the crater depth under high-velocity impact.