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A smooth contact algorithm for the combined finite discrete element method
Computational Particle Mechanics ( IF 3.3 ) Pub Date : 2020-03-12 , DOI: 10.1007/s40571-020-00329-2
Zhou Lei , Esteban Rougier , Bryan Euser , Antonio Munjiza

From its inception, the combined finite discrete element method has used a distributed potential contact force algorithm to resolve interaction between finite elements. The contact interaction algorithm relies on evaluation of the contact force potential field. The problem with existing algorithms is that the potential field introduces artificial numerical non-smoothness in the contact force. This work introduces a smooth potential field based on the finite element topology, and a generalized contact interaction law is constructed on top of the smooth potential field. A number of validation cases for the proposed algorithm, considering different shapes of discrete elements, are presented, and detailed aspects of the proposed contact interaction law are tested with numerical examples.



中文翻译:

组合有限离散元法的光滑接触算法

从一开始,组合有限离散元方法就使用了分布式势接触力算法来解决有限元之间的相互作用。接触相互作用算法依赖于接触力势场的评估。现有算法的问题在于,势场在接触力中引入了人工数值不光滑度。这项工作引入了基于有限元拓扑的平滑势场,并在平滑势场的顶部构造了广义接触相互作用定律。考虑到离散元件的不同形状,提出了许多针对该算法的验证案例,并通过数值示例对所提出的接触相互作用定律的详细方面进行了测试。

更新日期:2020-04-16
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