八节点等参元滑动接触算法的改进

Improved Sliding Contact Algorithm with 8-node Isoparameter Elements

分析认为采用八节点等参元计算滑动接触问题时,往往存在较大的接触应力计算误差的主要原因在于这种单元具有两种不同的节点。为此,本文提出了双模拟接触边界法,即分别采用两种不同的节点,形成两个模拟接触边界,并限制“从接触边界”上的节点只能和“主接触边界”上其同类节点形成的模拟接触边界形成接触关系,从而有效的减小了采用八节点等参元计算滑动接触问题时的误差。

To possibly eliminate the errors in sliding contact problems, a new method called as Double Simulation contact Boundary is proposed, where two simulation contact boundaries are constructed distinguishably, each of them has a single sort of nodes, and the nodes on Slave Boundary are allowed to contact the Master Boundary consisting of the same sort of nodes.