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@ARTICLE{Mser:173413,
author = {Müser, Martin},
title = {{S}ingle-asperity contact mechanics with positive and
negative work of adhesion: {I}nfluence of finite-range
interactions and a continuum description for the squeeze-out
of wetting fluids},
journal = {Beilstein journal of nanotechnology},
volume = {5},
issn = {2190-4286},
address = {Frankfurt, M.},
publisher = {Beilstein-Institut zur Förderung der Chemischen
Wissenschaften},
reportid = {FZJ-2014-06823},
pages = {419 - 437},
year = {2014},
abstract = {In this work, single-asperity contact mechanics is
investigated for positive and negative work of adhesion
Δγ. In the latter case, finite-range repulsion acts in
addition to hard-wall constraints. This constitutes a
continuum model for a contact immersed in a strongly wetting
fluid, which can only be squeezed out in the center of the
contact through a sufficiently large normal load FN. As for
positive work of adhesion, two stable solutions can coexist
in a finite range of normal loads. The competing solutions
can be readily interpreted as contacts with either a
load-bearing or a squeezed-out fluid. The possibility for
coexistence and the subsequent discontinuous wetting and
squeeze-out instabilities depend not only on the Tabor
coefficient μT but also on the functional form of the
finite-range repulsion. For example, coexistence and
discontinuous wetting or squeeze-out do not occur when the
repulsion decreases exponentially with distance. For
positive work of adhesion, the normal displacement mainly
depends on FN, Δγ, and μT but – unlike the contact area
– barely on the functional form of the finite-range
attraction. The results can benefit the interpretation of
atomic force microscopy in liquid environments and the
modeling of multi-asperity contacts.},
cin = {JSC},
ddc = {620},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {411 - Computational Science and Mathematical Methods
(POF2-411)},
pid = {G:(DE-HGF)POF2-411},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000334373100001},
doi = {10.3762/bjnano.5.50},
url = {https://juser.fz-juelich.de/record/173413},
}