A Study on Numerical Perforation Analysis of Axisymmetric Bullet by the Particle Method

Kim, Yong-Seok; Kim, Yong-Hwan

Journal of the Korea Institute of Military Science and Technology 2008;11(6):164-171.

Yong-Seok Kim, Yong-Hwan Kim

¹
²Chungnam National University

입자법을 이용한 축대칭 탄자의 관통거동 수치해석 연구

김용석, 김용환

¹국방과학연구소
²충남대학교

Abstract

A modified generalized particle algorithm, MGPA, was suggested to improve the computational efficiency of standard SPH method in numerical analysis of high speed impact behavior. This method uses a numerical failure mechanism than material failure models to describe the target penetration. MGPA algorithm was more effective to describe the impact phenomena and new boundaries produced during the calculation process were well recognized and treated in the target penetration problem of a bullet. When bullet perforation problems were analyzed by this method, MGPA algorithm calculation gives the stable numerical solution and stress oscillation or particle penetration phenomena were not shown. The error range in ballistic velocity limit is less than $2{sim}13%$ for various target thickness.

Key Words: Smoothed Particle Hydrodynamics, Hydrocode, Rod Impact, Particle Method, Elastic-Plastic Analysis, Ballistic Limit Velocity, Steel Plate Perforation