A comprehensive study of the elasto-plastic contact of a sphere and a flat

作者：Ghaednia Hamid^*; Pope Sara A; Jackson Robert L; Marghitu Dan B

来源：Tribology International, 2016, 93: 78-90.

DOI：10.1016/j.triboint.2015.09.005

• Elasto-plastic contact
• Contact area
• Contact force
• Yield strength ratio

In this paper the frictionless contact of an elasto-plastic sphere with an elasto-plastic flat has been studied. Previously, elasto-plastic contact has been studied mostly for either the isolated flattening or indentation cases. This work analyzes the case in between these, where both surfaces deform elastoplastically. It has been shown that the deformation on both objects has a significant effect on the real area of contact and the contact force. The ratio between the yield strengths of the sphere and the flat has been defined as a major governing factor. FEM analysis has been performed for more than 400 cases, and a comprehensive formulation has been developed based on the FEM results in order to predict the contact parameters.

• 出版日期2016-1