An improved CE/SE scheme for multi-material elastic–plastic flows and its applications

✍ Scribed by Jingtao Wang; Kaixin Liu; Deliang Zhang

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 603 KB
• Volume: 38
• Category: Article
• ISSN: 0045-7930
• DOI: 10.1016/j.compfluid.2008.04.014

✦ Synopsis

In this paper, a new definition of SE and CE, which is based on the hexahedron mesh and simpler than Chang's original CE/SE method (the space-time Conservation Element and Solution Element method), is proposed and an improved CE/SE scheme is constructed. Furthermore, the improved CE/SE scheme is extended in order to solve the elastic-plastic flow problems. The hybrid particle level set method is used for tracing the interfaces of materials. Proper boundary conditions are presented in interface tracking. Two high-velocity impact problems are simulated numerically and the computational results are carefully compared with the experimental data, as well as the results from other literature and LS-DYNA software. The comparisons show that the computational scheme developed currently is clear in physical concept, easy to be implemented and high accurate and efficient for the problems considered.