An improved contact-impact algorithm for explicit integration FEM |
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Authors: | Xu Shaozhong Wang Cheng Liu Xiaohu |
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Institution: | (1) Dept. of Mechanics, Huazhong Univ. of Sci. and Tech., 430074 Wuhan, China |
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Abstract: | Although the penalty algorithm is simple and direct in concept, it has 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 proposed in the present
paper. Based on the fact that bodies cannot penetrate into each other on the contact faces, a set of equations with the additional
unknown contact forces on the slave nodes can be formed in a new system configuration. By solving these equations, the correct
contact forces could be obtained without using the penalty factor. |
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Keywords: | contact-impact algorithm penalty method contact force |
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