Simulation on Equivalence between Layered Space Plates and Homogeneous Steel Impacted by a Tungsten Sphere

Abstract

To research on the equivalent of perforating through layered space plates and homogeneous steel, based on the rule that the limit penetrating velocity, the penetration process of tungsten sphere into layered space plates and homogeneous steel was simulated with LS-DYNA finite element code, the numerical results corresponded well to previous experimental observation. The expression between layered space plates and homogeneous steel impacted by a tungsten sphere was presented through analyzing the numerical results. Introduction In this paper a new optimal design of soccer robot control system which is based on mechanical analyses and calculations on the pressure and transmutation states of chip kick mechanics, this new control system with high precision for speed control and high dynamic quality. The penetration performance of fragment often is one of the important indicators of ammunition, and the penetration performance of fragment is often focused on the experiment and mechanism of a single homogeneous plate penetrated by fragment[1].For the structure of armor and missile, this paper focuses on layered space plates penetrated by fragment, and the protection level of layered space plates was equivalent by standard homogeneous steel. Numerical simulation is one of the main means of this kind of problem, It can greatly save the cost and shorten the research period by means of numerical simulation and the experimental correction[2]. Based on the principle of the equal ultimate velocity, the numerical simulation was used to the layered space plates and the homogeneous steel penetrated by the fragment through the finite element software LS-DYNA, and the equivalent relations of the layered space plates and the homogeneous steel target was preliminary study. Equivalence Principle The two kinds of principle can be chosen for the equivalent of the plate impacted by fragment: the ultimate velocity method and the residual penetration method. From the evaluation of the power of ammunition, the ultimate velocity method was chosen, from the evaluation of the ability of target anti-damage, the residual penetration method was generally chosen. The ultimate velocity method was selected in this paper. The H1/2 thickness of each layer of the layered space plates and the H2 thickness of homogeneous steel target was penetrated by spherical fragment, and the same V50 of ultimate velocity was obtained on two kinds of target, so the total H1 thickness of layered space plates and the H2 thickness of homogeneous steel was equivalent. The equivalent diagram of layered space plates and homogeneous steel as shown in Fig. 1. International Power, Electronics and Materials Engineering Conference (IPEMEC 2015) © 2015. The authors Published by Atlantis Press 754