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Sliding of rough surfaces and energy dissipation with a 3D multiscale approach
Author(s) -
Anciaux G.,
Molinari J. F.
Publication year - 2010
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.2845
Subject(s) - stiffening , dissipation , multiscale modeling , coupling (piping) , domain (mathematical analysis) , deformation (meteorology) , surface (topology) , statistical physics , computer science , mechanics , materials science , mechanical engineering , structural engineering , physics , geometry , mathematics , engineering , mathematical analysis , thermodynamics , chemistry , computational chemistry , composite material
The purpose of this paper is to present a novel approach to study sliding friction by the use of 3D multiscale coupling techniques. We highlight the difficulties of using multiscale schemes that couple molecular dynamics (MD) with finite elements to perform sliding contact between rough surfaces. The paper is comprised of systematic comparisons between the coupled model with an equivalent MD domain as well as reduced models. Reduced models appear inadequate for reproducing the time evolution of frictional forces as the small depths yield a stiffening of the contact region. The overlap domain used in the multiscale scheme is successful at capturing the complex deformation dynamics beneath the surface. Yet our results call for further developments in multiscale coupling strategies to allow a more rigorous treatment of heat exchanges through the overlap region. Copyright © 2010 John Wiley & Sons, Ltd.