采用二次等参体元时的接触判据

当二次等参体元用于分析接触问题时,接触面上节点集中接触力不同号给建立接触判据造成困难。本文建立了由节点集中接触力计算接触面上分布接触力节点值的方法,从而可顺利建立接触判据。此方法已成功应用于工程中的弹性固体接触问题分析,文末给出了一个计算实例。

Contact Criteria When Using Quadratic Isoparametric Solid Elements

When quadratic isoparametric solid elements are used in the analysis of contact problems, one difficulty in establishing the contact criteria is that nodal lumped contact forces on the actual contact surfaces have different signs. In this paper,is presented the technique of calculating the nodal values of the distributed contact forces on the contact surface from the nodal lumped contact forces. And hence the contact criteria with the nodal values of the distributed contact forces are established easily. The criteria are applied successfully to the elastic solid contact problems in engineering,and one example is given here.