Development of 3-Dim FEM Multi-Material Hydrocode

Lee, Min-Hyung

Journal of the Korea Institute of Military Science and Technology 2008;11(5):116-123.

Min-Hyung Lee

Sejong University

3차원 FEM 다중물질 하이드로코드 개발 현황

이민형

세종대학교

Abstract

Hydrocodes are large computer programs that can be used to solve a wide variety of highly transient problems such as high-speed impact and explosion events. This paper describes the recent activity to develop a Multi-material hydrocode in Korea. The code consists of two stages; Lagrangian, and remap stages. Although a sophisticated contact algorithm has been developed for Lagrangian calculations, a relatively simple mechanics at the interfaces of materials are used in the multi-material Eulerian code. Volume of fluid interface reconstruction methods are used to resolve the interfaces between different materials. For the advection stage of the cell centered properties, one-dimensional hyperbolic equation is used. Test problems demonstrated here are the high-speed impact/penetration and explosion problems.

Key Words: Hydrocode, Multi-material, Contact, High-Speed Impact, Explosion