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TECHNICAL PAPERS

A Method for Determining the Asperity Distribution of Contacting Rough Surfaces

[+] Author and Article Information
Reese E. Jones, David A. Zeigler

Sandia National Laboratories, Livermore, CA 94551-0969, U.S.A.

J. Tribol 127(1), 24-29 (Feb 07, 2005) (6 pages) doi:10.1115/1.1828077 History: Received February 03, 2004; Revised June 23, 2004; Online February 07, 2005
Copyright © 2005 by ASME
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Figures

Grahic Jump Location
Comparison of the surface height distribution values. The original values are derived from a Gaussian distribution function with μ=0 and σ=1.
Grahic Jump Location
Approximation of the nondimensionalized TBT data with a least-squares norm fit using inverse power law functions. The topmost line corresponds to the initial loading, the middle line corresponds to the initial unloading, and the bottom-most line represents the second loading.
Grahic Jump Location
Approximate asperity height distribution calculated from TBT data corresponding to asperities with elastic response behavior. The loading acts to flatten the higher asperities. As a result, the distribution shifts toward the mean plane as the surfaces come in contact.
Grahic Jump Location
Close-up of the approximate asperity height distribution calculated from TBT data corresponding to asperities with elastic response behavior. Notice that the line corresponding to the initial load crosses the other lines. This is consistent with the physical model where taller asperities are flattened as a result of the contact.
Grahic Jump Location
Comparison of the surface height distribution values. The original values are derived from a Gaussian distribution function with μ=0,σ=0.75, and scaled to have maximal height 1/2π.
Grahic Jump Location
Approximate asperity height distribution calculated from TBT data corresponding to asperities with elastic–plastic response behavior. The loading acts to flatten the higher asperities. As a result, the distribution shifts toward the mean plane as the surfaces come in contact.
Grahic Jump Location
Close-up of the approximate asperity height distribution calculated from TBT data corresponding to asperities with elastic–plastic response behavior. Notice that the line corresponding to the initial load crosses the other lines. This is consistent with the physical model where taller asperities are flattened as a result of the contact.

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