INVESTIGATE THE PENETRATION CHARACTERISTICS OF A FOLLOWING KINETIC ENERGY PROJECTILE TO CONCRETE WITH A PRE-DRILLED CAVITY

Abstract

The penetration characteristic of a following kinetic energy projectile to the concrete with a pre-drilled cavity is investigated through the theory and numerical simulations. With the precondition of the equivalent volume of the pre-drilled cavity, the results are compared in terms of the kinetic parameters of the penetration process, the depth of penetration of the following kinetic energy projectile. A theoretical model is then employed to assess the depth of penetration of the following kinetic energy projectile at the condition of variation of the diameter and the depth but the volume of the pre-drilled cavity being invariant. In addition, the numerical simulation is carried out to present the penetration process of the following kinetic energy projectile to the concrete with a pre-drilled cavity. The results show that the existence of the pre-drilled cavity is conducive to increase the depth of penetration of the following kinetic energy projectile on the concrete. In case of the same volume of the pre-drilled cavity, the depth of penetration of the following kinetic energy projectile on concreter increases initially and decreases afterwards with increase of the diameter of the pre-drilled cavity. The theoretical results correlate with the simulation results reasonably well.