Contact Mechanics of Rough Spheres: Crossover from Fractal to Hertzian Behavior. (18th July 2013)

• Record Type: Journal Article
• Authors: Pohrt, Roman; Popov, Valentin L.
• Other Names: Kim Dae-Eun Academic Editor.
• Is Part Of: Advances in tribology. Volume 2013(2013)
• Publication Date: 2013-07-18
• Subjects: Tribology -- Periodicals; 621.8905
• DOI: 10.1155/2013/974178
• Languages: English
• ISSNs: 1687-5915

Abstract

Abstract : We investigate the normal contact stiffness in a contact of a rough sphere with an elastic half-space using 3D boundary element calculations. For small normal forces, it is found that the stiffness behaves according to the law of Pohrt/Popov for nominally flat self-affine surfaces, while for higher normal forces, there is a transition to Hertzian behavior. A new analytical model is derived describing the contact behavior at any force.