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Evolution of the free volume between rough surfaces in contact

Paggi, Marco and He, Qi-Chang Evolution of the free volume between rough surfaces in contact. Wear, 336. pp. 86-95. ISSN 0043-1648 (2015)

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The free volume comprised between rough surfaces in contact governs the fluid/gas transport properties across networks of cracks and the leakage/percolation phenomena in seals. In this study, a fundamental insight into the evolution of the free volume depending on the mean plane separation, on the real contact area and on the applied pressure is gained in reference to fractal surfaces whose contact response is solved using the boundary element method. Particular attention is paid to the effect of the surface fractal dimension and of the surface resolution on the predicted results. The free volume domains corresponding to different threshold levels are found to display fractal spatial distributions whose bounds to their fractal dimensions are theoretically derived. A synthetic formula based on the probability distribution function of the free volumes is proposed to synthetically interpret the numerically observed trends.

Item Type: Article
Identification Number: 10.1016/j.wear.2015.04.021
Projects: ERC StG CA2PVM
Funders: European Research Council
Uncontrolled Keywords: Rough surfaces; Contact mechanics; Boundary element method; Evolution of the free volume
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
T Technology > TJ Mechanical engineering and machinery
Research Area: Computer Science and Applications
Depositing User: Prof Marco Paggi
Date Deposited: 08 Oct 2015 08:06
Last Modified: 27 Mar 2017 14:23
URI: http://eprints.imtlucca.it/id/eprint/2764

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