关键词: 粗糙表面, 弹塑性接触, 耦合方法, 无网格伽辽金—有限元, 自适应, 低速爬行, 驱动进给系统, 动态摩擦

Abstract: A new surface description model for elastic-plastic asperity contact problems is presented to remove the nodes, which have little influence for the description of the surface profile. Element-free Galerkin-finite element (EFG-FE) coupling method is utilized to fit the requirement of irregular surface node arrangement when some of the surface nodes are removed because of its flexibility in domain discretization and versatility in node arrangements. The results express that the computing time can be dramatically reduced to about 50% of original computing time in the example studied when the relative errors are about 5%. Some factors, which may influence the elastic-plastic contact of adaptive rough surfaces, are inves-tigated and discussed.

Key words: Adaptive, Coupling method, Elastic-plastic contact, Element-free Galerking-finite element (EFG-FE), Rough surface, Drive feed system, Low-speed creeping, Nonlinear friction