A three-stage model for the perforation of finite metallic plates by long rods at high velocities

作     者：Yu He Liu-yun Xu He-ming Wen Zheng-cao Lu 

作者机构：National Key Laboratory of Shock Wave and Detonation Physics Institute of Fluid Physics CAEP Mianyang 621900 China CAS Key Laboratory for Mechanical Behavior and Design of Materials University of Science and Technology of China Hefei Anhui 230027 China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2019年第15卷第3期

页      面：409-418页

核心收录：

学科分类：08[工学] 0826[工学-兵器科学与技术] 

主　　题：Perforation Long rod Finite metallic plate Ballistic limit Residual velocity Residual length 

摘      要：A three-stage theoretical model is presented herein to predict the perforation of a thick metallic plate struck normally by a long rod at high velocities. The model is suggested on the basis of the assumption that the perforation of a thick metallic plate by a long rod can be divided into three stages:(1) initial penetration;(2) plug formation and (3) plug slipping and separation. Various analytical equations are derived which can be employed to predict the ballistic limit, residual velocity and residual length of the long rod. It is demonstrated that the present model predictions are in good agreement with available experimental results for the perforation of finite steel targets struck normally by steel as well as tungsten alloy long rods at high velocities. It is also demonstrated that the dynamic maximum shear stress of a plate material has strong effect on plug formation and plug thickness which, in turn, exerts considerable influence on the residual velocities and lengths of a long rod at impact velocities just above the ballistic limit.