A model for elastic-plastic spherical contact of rough surfaces under combined normal and tangential loadings, with full stick contact condition, is presented. The model allows evaluation of the effect of surface roughness on the real contact area, static friction and junction growth under small normal loads. It is shown that as the normal load approaches a certain threshold value, which depends on the plasticity index, the results of the present rough surface model approach these of previous corresponding models for smooth sphere and a rigid flat. At normal load values below the threshold load, the correlation of the present results and published experimental results is much better in comparison with the results of the smooth surface models.
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April 2009
Research Papers
The Effect of Surface Roughness on Static Friction and Junction Growth of an Elastic-Plastic Spherical Contact
D. Cohen,
D. Cohen
Department of Mechanical Engineering,
Technion
, Haifa 32000, Israel
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Y. Kligerman,
Y. Kligerman
Department of Mechanical Engineering,
Technion
, Haifa 32000, Israel
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I. Etsion
I. Etsion
Fellow ASME
Department of Mechanical Engineering,
e-mail: etsion@technion.ac.il
Technion
, Haifa 32000, Israel
Search for other works by this author on:
D. Cohen
Department of Mechanical Engineering,
Technion
, Haifa 32000, Israel
Y. Kligerman
Department of Mechanical Engineering,
Technion
, Haifa 32000, Israel
I. Etsion
Fellow ASME
Department of Mechanical Engineering,
Technion
, Haifa 32000, Israele-mail: etsion@technion.ac.il
J. Tribol. Apr 2009, 131(2): 021404 (10 pages)
Published Online: March 5, 2009
Article history
Received:
August 30, 2008
Revised:
December 24, 2008
Published:
March 5, 2009
Citation
Cohen, D., Kligerman, Y., and Etsion, I. (March 5, 2009). "The Effect of Surface Roughness on Static Friction and Junction Growth of an Elastic-Plastic Spherical Contact." ASME. J. Tribol. April 2009; 131(2): 021404. https://doi.org/10.1115/1.3075866
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