Adhesive contacts of a rigid sphere and an elastic-perfectly plastic half-space

作者：Gu, Jian-zu; Li, Long-yuan^*

来源：Computational Materials Science, 2010, 48(4): 848-853.

DOI：10.1016/j.commatsci.2010.04.006

• Contact mechanics
• Elastic-plastic material
• Adhesive contact
• Loading and unloading
• Plastic pull-off force

This paper presents a study on the adhesive contact of a rigid sphere with an elastic perfectly plastic half-space. Analytical solutions for contact force and contact radius relation, contact force and contact displacement relation during both loading and unloading are derived. From the present solutions the plastic pull-off force can be calculated analytically. The present study shows that the plastic pull-off force calculated with considering the variation of curvature within the contacted surface is higher than that calculated based on a constant curvature taken at the contact centre, and specially if the contact radius is calculated based on the Hertzian solution for elastic contacts then the obtained plastic pull-off force will be less than a half of the present plastic pull-off force.

• 出版日期2010-6
• 单位江苏大学