Resistance during Cratering for Projectile Penetrating into Concrete Target

In order to explore an expression formula for the stress undergone by the nose of the projectile during cratering in the process of penetration, penetration performance in the surface layer of the concrete target was analyzed using the stress wave damage theory.The crater-forming mechanism was explained based on the theory of stress wave obliquely reflection, and the expression formula was established for the stress endured by the nose of the projectile.By conducting numerical simulations and experiments, the depths of the carter were measured to verify the engineering model.The results indicate that the resistance is related to the velocity and the nose shape of the projectiles.A comparison of the theoretical and numerical results with the experimental data demonstrates an improved agreement between them.The new model, which is capable of overcoming the shortcomings of the Forrestal method, successfully describes the relation between the penetration velocity and the crater depth and can be applied to the calculation of the resistance for projectiles penetrating into concrete targets.