Dynamic Behavior of Non-Deformable Projectiles with Different Nose Shape Penetrating Steel Plate

Dynamic behavior of non-deformable projectiles with different nose shapes penetrating steel plate was simulated by Autodyn-3D finite element code. The numerical simulation results show that projectile's nose shape significantly affects the penetration behavior and failure mode of steel plate. When penetrating the steel plate by a blunt nose shape projectile, the typical dynamic behavior appears an adiabatic shear band formation and propagation initially, then inducing a plug ejection finally, with a thickening plug while increasing the impact velocity. For a hemispherical projectile penetrating, the steel plate shows a typical dynamic behavior of necking close and enlarging hole, and the size of the plug induced by necking close decrease with the impact velocity decrease. As penetrated the steel plate by a conical projectile, a typical dynamic behavior of permanent radial compressive and enlarging hole is produced, then resulting in a petal perforation finally.