An Elliptic Elastic-Plastic Asperity Microcontact Model for Rough Surfaces

[+] Author and Article Information
Jeng Haur Horng

Department of Power Mechanical Engineering, National Huwei Polytechnic Institute, Huwei, Yunlin, Taiwan, 70101

J. Tribol 120(1), 82-88 (Jan 01, 1998) (7 pages) doi:10.1115/1.2834194 History: Received July 30, 1996; Revised January 20, 1997; Online January 24, 2008


An elastic-plastic microcontact model, that takes into account the directional nature of surface roughness, is proposed for elliptic contact spots between anisotropic rough surfaces. In addition, the plasticity index was modified to suit more general geometric contact shapes. This contact model, which expands the usefulness of the CEB model, is also utilized to determine the effect of effective radius ratio (γ) on microcontact behavior and to compare the results of this model and other models under different surface topographies. The results show that the elliptic contact model and circular contact model deviate considerably in regard to the separation (h), total real contact area (At ), plastic area (Ap ) and plasticity index (Ψ). The present model can be simplified to become other stochastic models.

Copyright © 1998 by The American Society of Mechanical Engineers
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