The friction coefficient of a contact surface with elliptical asperities is examined at various values of the plasticity index , the effective radius ratio , the shear-strength-pressure proportionality constant , and the dimensionless limiting interfacial shear strength . The results demonstrate that the friction coefficient of the contact system increases with an increasing value of but decreases with an increasing value of . Furthermore, it is shown that Amonton’s law is applicable for contact systems with either a low and a high or a high and a low . Analyzing the ratio of the nonelastic contact area, it is found that the asperities of a surface characterized by a large generally deform elastically at all values of the plasticity index, while those of a surface with a larger deform plastically, particularly for surfaces with higher values of and . Finally, an inspection of the critical dimensionless real contact area shows that the contact mode of the surface is determined primarily by the value of the effective radius ratio.
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e-mail: imeyrj@ccu.edu.tw
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April 2009
Research Papers
Static Friction Model of Elastic-Plastic Contact Behavior of Surface With Elliptical Asperities
Yeau-Ren Jeng,
Yeau-Ren Jeng
Professor
Department of Mechanical Engineering,
e-mail: imeyrj@ccu.edu.tw
National Chung Cheng University
, 168 University Road, Ming-Hsiung, Chia-Yi 621, Taiwan
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Shin-Rung Peng
Shin-Rung Peng
Department of Mechanical Engineering,
National Chung Cheng University
, 168 University Road, Ming-Hsiung, Chia-Yi 621, Taiwan
Search for other works by this author on:
Yeau-Ren Jeng
Professor
Department of Mechanical Engineering,
National Chung Cheng University
, 168 University Road, Ming-Hsiung, Chia-Yi 621, Taiwane-mail: imeyrj@ccu.edu.tw
Shin-Rung Peng
Department of Mechanical Engineering,
National Chung Cheng University
, 168 University Road, Ming-Hsiung, Chia-Yi 621, TaiwanJ. Tribol. Apr 2009, 131(2): 021403 (10 pages)
Published Online: March 5, 2009
Article history
Received:
April 1, 2008
Revised:
December 25, 2008
Published:
March 5, 2009
Citation
Jeng, Y., and Peng, S. (March 5, 2009). "Static Friction Model of Elastic-Plastic Contact Behavior of Surface With Elliptical Asperities." ASME. J. Tribol. April 2009; 131(2): 021403. https://doi.org/10.1115/1.3075857
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