eprintid: 2764
rev_number: 10
eprint_status: archive
userid: 56
dir: disk0/00/00/27/64
datestamp: 2015-10-08 08:06:56
lastmod: 2017-03-27 14:23:19
status_changed: 2015-10-08 08:06:56
type: article
metadata_visibility: show
creators_name: Paggi, Marco
creators_name: He, Qi-Chang
creators_id: marco.paggi@imtlucca.it
creators_id: 
title: Evolution of the free volume between rough surfaces in contact
ispublished: pub
subjects: Q1
subjects: QC
subjects: TJ
divisions: CSA
full_text_status: public
keywords: Rough surfaces; Contact mechanics; Boundary element method; Evolution of the free volume
abstract: 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.
date: 2015
date_type: published
publication: Wear
volume: 336
publisher: Elsevier
pagerange: 86-95
id_number: 10.1016/j.wear.2015.04.021
refereed: TRUE
issn: 0043-1648
official_url: http://www.sciencedirect.com/science/article/pii/S0043164815002367
funders: European Research Council
projects: ERC StG CA2PVM
citation:   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)  
document_url: http://eprints.imtlucca.it/2764/1/1604.05215.pdf