A Multilevel Model for Elastic-Plastic Contact Between a Sphere and a Flat Rough Surface

作者：Wang F Steven^*; Block Joseph M; Chen W Wayne; Martini Ashlie; Zhou Kun; Keer Leon M; Wang Q Jane

来源：Journal of Tribology, 2009, 131(2): 021409.

DOI：10.1115/1.3085944

• deformation
• elastoplasticity
• mechanical contact
• rough surfaces
• surface topography

Elastic-plastic contact of a smooth sphere and a half-space with a real machined surface is simulated using an integration-based multilevel contact model. The total surface deflection is composed of bulk and asperity deformations. They are calculated at the global and the asperity level, respectively, which are connected through the asperity-supporting load. With this new model, the accurate contact area and contact pressure under a given load are quickly predicted using a relatively coarse grid system. The calculated load-area curve shows good agreement with the experimental data. Finally, the effects of the surface topography, including roughness and the asperity radius, upon the real contact area are analyzed.

• 出版日期2009-4
• 单位西北大学