An adaptive meshless method for contact with rough interfaces
Surface roughness is a significant aspect of the contact between solid bodies. From a microscopic viewpoint, the contact between rough surfaces occurs through a number of single pair of asperities in contact with each other. Therefore the force-displacement relationship of single pair of asperities is of great importance. Most rough contact models have used classic Hertz theory to describe the force-displacement relationship of single pair of asperities. However, Hertz contact theory is based on small deformation assumption, which cannot be guaranteed in rough contact. In this paper, we propose an adaptive meshless method to solve the asperity contact problem with automatic insertion of additional nodes into large error regions. Since the proposed meshless method does not rely on small displacement assumptions, it can solve nonlinear contact problem with large deformation. The proposed method is implemented to obtain asperity contact forcedisplacement relationship. These results are compared to those obtained from a commercial FEM software and analytical solution. Finally, we use a statistical method to sum single pair of asperities of varying sizes and orientations to obtain the global force-displacement relationship.
rough contact large deformation force-displacement relationship meshless method
Anil Misra Shiping Huang
Department of Civil,Environmental and Architectural Engineering,the University of Kansas,United States,66044
国际会议
南京
英文
1
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）