Granular friction: Triggering large events with small vibrations

Scientific Reports
Henri LastakowskiValérie Vidal

Abstract

Triggering large-scale motion by imposing vibrations to a system can be encountered in many situations, from daily-life shaking of saltcellar to silo unclogging or dynamic earthquakes triggering. In the well-known situation of solid or granular friction, the acceleration of imposed vibrations has often been proposed as the governing parameter for the transition between stick-slip motion and continuous sliding. The threshold acceleration for the onset of continuous slip motion or system unjamming is usually found of the order of the gravitational acceleration. These conclusions are mostly drawn from numerical studies. Here, we investigate, in the laboratory, granular friction by shearing a layer of grains subjected to horizontal vibrations. We show that, in contrast with previous results, the quantity that controls the frictional properties is the characteristic velocity, and not the acceleration, of the imposed mechanical vibrations. Thus, when the system is statically loaded, the typical acceleration of the vibrations which trigger large slip events is much smaller than the gravitational acceleration. These results may be relevant to understand dynamic earthquake triggering by small ground perturbations.

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Citations

Aug 16, 2017·Proceedings of the National Academy of Sciences of the United States of America·E DeGiuli, M Wyart
Nov 28, 2018·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·L de ArcangelisA Sarracino
Nov 30, 2019·Physical Chemistry Chemical Physics : PCCP·Romain Lhermerout, Susan Perkin
Jul 18, 2019·The European Physical Journal. E, Soft Matter·V VidalJ -C Géminard
Apr 19, 2017·PloS One·Baptiste Darbois TexierFrancisco Melo
Apr 4, 2019·Scientific Reports·S van den WildenbergA Tourin
Apr 26, 2018·Physical Review Letters·A GnoliA Sarracino
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Sep 7, 2019·Physical Review Letters·Luigi La RagioneGregory P Bewley
Nov 21, 2020·Physical Review. E·J LéopoldèsA Mangeney
Jul 8, 2021·Scientific Reports·Vicente SalinasGustavo Castillo

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