RESEARCH FOR EXPLOSION OF HIGH EXPLOSIVE IN COMPLEX MEDIA

Abstract

Numerical analysis is an important tool in obtaining a detailed understanding about explosive phenomena. In this research, we perform the analysis of multilayer model with the air layer. In our calculation code, the analysis of compressible substances, which cells transform greatly (like air) generally is very difficult. In this research, we used LS-DYNA3D, an analysis code using a finite-element method. By analyzing the stress state of the air hole circumference, multilayer models such as air, water and structure are analyzed and it aims to get the propagation process of the shock wave. The multi-material Arbitrary Lagrangian Eulerian (MMALE) [1] method improves upon pure Eulerian formulation by allowing the reference fluid meshes to translate, rotate and deform, thus minimize the amount of flux transport, and reduce mesh size of the reference fluid meshes.