(1. College of Naval Architecture and Power, Naval Univ. of Engineering, Wuhan 430033, China; 2. Naval Representative Office Stationed at 407 Factory, Luoyang 471039, China)
Abstract： The current research on the ballistic limit of sharp projectiles penetrating metallic targets has many disadvantages. It needs many ballistic experiment data, dynamic parameters of targets’ material and doesn’t consider the infection of the projectiles’ velocity. These limitations result in many disadvantages and error in engineering applications. Based on velocity effects, targets’ material parameters, hydrokinetics and dynamic cavity expansion theories, double modes and single mode penetrating models are built. The penetration process of double modes is analyzed two phases: hydrokinetics distortion phase and plastic distortion phase. When the velocity is less than the hydrokinetics distortion critical velocity, the second phase will start. An analytical model is built and can calculate ballistic limit. Single mode only has plastic distortion phase. The results calculated by the analytical model are accord with the experimental results. The analytical model hasn’t ballistic experiment data and dynamic parameters of targets’ material, so it can be calculated easily and used conveniently in engineering domain. The analytical model can be used to evaluate anti-penetrating capability of metallic targets by sharp-nosed projectile.
2010, Vol. 29 
