Journal ArticleDOI
Physical analysis of the state- and rate-dependent friction law. II. Dynamic friction
Reads0
Chats0
TLDR
In this article, an extensive study of dynamic friction at non-lubricated multicontact interfaces between nominally flat bodies, rough on the micrometer scale, made of identical polymer glasses, was performed at temperatures ranging from $20 to close below the glass transitions.Abstract:
We report an extensive study of dynamic friction at nonlubricated multicontact interfaces between nominally flat bodies, rough on the micrometer scale, made of identical polymer glasses. This work, which complements a previous study of static friction on the same systems, has been performed at temperatures ranging from $20\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$ to close below the glass transitions. The data are analyzed within the framework of the Rice-Ruina state- and rate-dependent friction model. We show that this phenomenology is equivalent to a generalized Tabor decomposition of the friction force into the product of an age-dependent load-bearing area and of a velocity-strengthening interfacial shear stress. Quantitative analysis of this latter term leads to associate velocity strengthening with thermal activation of basic dynamical units of nanometer dimensions. We interpret our results with the help of a model due to Persson, in which shear is localized in a nanometer-thick interfacial adhesive layer, pinned elastically at a low shear level. Sliding proceeds via uncorrelated depinning of ``nanoblocks'' which constitute the layer. It is the competition between the drive-induced loading of these blocks up to their depinning stress and the thermally activated premature depinning events which leads to the velocity-strengthening contribution to the interfacial strength. In our interpretation, friction therefore appears as the localized elastoplastic response of a confined amorphous interfacial layer.read more
Citations
More filters
Journal ArticleDOI
Wetting and Spreading
TL;DR: In this article, the surface forces that lead to wetting are considered, and the equilibrium surface coverage of a substrate in contact with a drop of liquid is examined, while the hydrodynamics of both wetting and dewetting is influenced by the presence of the three-phase contact line separating "wet" regions from those that are either dry or covered by a microscopic film.
Journal ArticleDOI
Rate and state dependent friction and the stability of sliding between elastically deformable solids
TL;DR: In this paper, the stability of steady sliding between elastically deformable continua using rate and state dependent friction laws was studied for both elastically identical and elastically dissimilar solids.
Journal ArticleDOI
Postseismic relaxation driven by brittle creep: A possible mechanism to reconcile geodetic measurements and the decay rate of aftershocks, application to the Chi-Chi earthquake, Taiwan
TL;DR: In this article, the authors evaluate the effect of coseismic stress changes on the fault slip at midcrustal depth, assuming a velocity-strengthening brittle creep rheology, and show that this model can help reconcile the time evolution of afterslip, as measured from geodesy, with aftershocks decay.
Journal ArticleDOI
Detachment fronts and the onset of dynamic friction
TL;DR: It is shown that the onset of frictional slip is governed by three different types of coherent crack-like fronts: these are observed by real-time visualization of the net contact area that forms the interface separating two blocks of like material.
Journal ArticleDOI
Solid friction from stick–slip down to pinning and aging
TL;DR: In this article, the behavior of friction at interfaces between macroscopic hard rough solids, whose main dynamical features are well described by the Rice-Ruina rate and state-dependent constitutive law, are analyzed.
References
More filters
Book
The friction and lubrication of solids
Frank Philip Bowden,David Tabor +1 more
TL;DR: Tabor and Bowden as mentioned in this paper reviewed the many advances made in this field during the past 36 years and outlined the achievements of Frank Philip Bowden, and reviewed the behavior of non-metals, especially elastomers; elastohydrodynamic lubrication; and the wear of sliding surfaces.
Book
Friction and Wear of Materials
Ernest Rabinowicz,R. I. Tanner +1 more
TL;DR: Abrasive and other types of wear include: adhesives, lubrication, friction, and adhesion, as well as material properties that influence surface interaction as discussed by the authors.
Book
Mechanical properties of solid polymers
TL;DR: A concise, self-contained introduction to solid polymers, the mechanics of their behavior and molecular and structural interpretations can be found in this article, which provides extended coverage of recent developments in rubber elasticity, relaxation transitions, non-linear viscoelastic behavior, anisotropic mechanical behavior, yield behavior of polymers and other fields.
BookDOI
Physics of sliding friction
Bo N. J. Persson,Erio Tosatti +1 more
TL;DR: In this article, a simple model of Wearless Friction the Frenkel-Kontorova-Tomlinson Model was proposed to model the dynamics of stick-slip friction.