Journal ArticleDOI
Detachment fronts and the onset of dynamic friction
TLDR
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.Abstract:
The dynamics of friction have been studied for hundreds of years, yet many aspects of these everyday processes are not understood. One such aspect is the onset of frictional motion (slip). First described more than 200 years ago as the transition from static to dynamic friction, the onset of slip is central to fields as diverse as physics1,2,3, tribology4,5, mechanics of earthquakes6,7,8,9,10,11 and fracture12,13,14. Here we show 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. Two of these fronts, which propagate at subsonic and intersonic velocities, have been the subject of intensive recent interest12,13,14,15,16,17. We show that a third type of front, which propagates an order of magnitude more slowly, is the dominant mechanism for the rupture of the interface. No overall motion (sliding) of the blocks occurs until either of the slower two fronts traverses the entire interface.read more
Citations
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Journal ArticleDOI
A role of friction-induced torque in sliding friction of rubber materials
TL;DR: In this article, the role of friction-induced torque in sliding friction of rubber materials is investigated, and a friction tester is developed to monitor the friction force between a silicon rubber block and a surface made of PMMA.
Journal ArticleDOI
Laboratory earthquake forecasting: A machine learning competition.
Paul A. Johnson,Bertrand Rouet-Leduc,Laura J. Pyrak-Nolte,Gregory C. Beroza,Chris Marone,Claudia Hulbert,Addison Howard,Philipp Singer,Dmitry Gordeev,Dimosthenis Karaflos,Corey J. Levinson,Pascal Pfeiffer,Kin Ming Puk,Walter Reade +13 more
TL;DR: The Kaggle Challenge as discussed by the authors used Google's ML competition platform to engage the worldwide ML community with a competition to develop and improve data analysis approaches on a forecasting problem that uses laboratory earthquake data.
Journal Article
Static and dynamic friction in sliding colloidal monolayers
TL;DR: In this article, the authors present realistic simulations and arguments that besides reproducing the main experimentally observed features give a first theoretical demonstration of the potential impact of colloid sliding in nanotribology.
Journal ArticleDOI
Friction and nonlinear dynamics
Nicola Manini,Oleg M. Braun,Erio Tosatti,Erio Tosatti,Erio Tosatti,Roberto Guerra,Roberto Guerra,Andrea Vanossi,Andrea Vanossi +8 more
TL;DR: The nonlinear dynamics associated with sliding friction forms a broad interdisciplinary research field that involves complex dynamical processes and patterns covering a broad range of time and length scales as mentioned in this paper, and progress in experimental techniques and computational resources has stimulated the development of more refined and accurate mathematical and numerical models, capable of capturing many of the essentially nonlinear phenomena involved in friction.
Journal ArticleDOI
Generalized law of friction between elastomers and differently shaped rough bodies
TL;DR: Analytical relations describing the coefficient of friction in a wide range of loading conditions and a master curve procedure for the dependence on the normal force are suggested.
References
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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.
Journal ArticleDOI
Earthquakes and friction laws
TL;DR: The traditional view of tectonics is that the lithosphere comprises a strong brittle layer overlying a weak ductile layer, which gives rise to two forms of deformation: brittle fracture, accompanied by earth-quakes, in the upper layer, and aseismic ductile flow in the layer beneath as mentioned in this paper.
Journal ArticleDOI
The pseudogap in high-temperature superconductors: an experimental survey
Thomas Timusk,B. W. Statt +1 more
TL;DR: The pseudogap is seen in all high-temperature superconductors and there is general agreement on the temperature and doping range where it exists as discussed by the authors, and it is also becoming clear that the superconducting gap emerges from the normal state pseudogaps.
Journal ArticleDOI
Episodic Tremor and Slip on the Cascadia Subduction Zone: The Chatter of Silent Slip
Garry C. Rogers,Herb Dragert +1 more
TL;DR: It is proposed that ETS activity can be used as a real-time indicator of stress loading of the Cascadia megathrust earthquake zone and is called episodic tremor and slip (ETS).
Book
Sliding Friction: Physical Principles and Applications
TL;DR: In this article, a sliding system on clean (Dry) and lubed surfaces is presented. But it does not consider the effect of surface topography and surface contaminants.