AN IMPROVED CONTACT-IMPACT ALGORITHM FOR EXPLICIT INTEGRATION FEM

• 来源期刊: 力学学报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（6）
• 页码范围: 649-651
• 页数: 3页
• 分类号: O3
• 语种: 英文

摘要

Although the penalty algorithm is simple and direct in concept, ithas a defect that the contact forces are badly dependent on the chosen penalty factor.An improved contact-impact algorithm for the explicit integration FEM is proposedin the present paper. Based on the fact that bodies cannot penetrate into each otheron the contact faces, a set of equations with the additional unknown contact forceson the slave nodes can be formed in a new system configuration. By solving theseequations, the correct contact forces could be obtained without using the penaltyfactor.