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Gutenberg-Richter’s law in sliding friction of gels

Yamaguchi, Tetsuo and Morishita, Masatoshi and Doi, Masao and Hori, Takane and Sakaguchi, Hide and Ampuero, Jean-Paul (2011) Gutenberg-Richter’s law in sliding friction of gels. Journal of Geophysical Research B, 116 (B12). Art. No. B12306. ISSN 0148-0227. doi:10.1029/2011JB008415.

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We report on experimental studies of spatio-temporally heterogeneous stick-slip motions in the sliding friction between a hard polymethyl methacrylate (PMMA, plexiglass) block and a soft poly-dimethyl siloxane (PDMS, silicone) gel plate. We perform experiments on two PDMS gels with different viscoelastic properties. For the less viscous gel, large and rapid events are preceded by an alternation of active and less active periods. For the more viscous gel, successive slow slip events take place continuously. The probability distributions of the force drop, a quantity analogous to seismic moment, obey a power law similar to Gutenberg-Richter's empirical law for the frequency-size statistics of earthquakes, and the exponents of the power law vary with the plate velocity and the viscosity of the gel. We propose a simple model to explain the dependence of the power law exponent on the plate velocity, which agrees with experimental results.

Item Type:Article
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Ampuero, Jean-Paul0000-0002-4827-7987
Additional Information:© 2011 American Geophysical Union. Received 4 April 2011; revised 28 September 2011; accepted 29 September 2011; published 13 December 2011. We thank T. Hatano, S. Ide, H. Kitahata, and Y. Sumino for valuable comments.
Group:Seismological Laboratory
Subject Keywords:Gutenberg-Richter's law; gel; sliding friction; stick-slip
Issue or Number:B12
Record Number:CaltechAUTHORS:20120125-093744107
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Official Citation:Yamaguchi, T., M. Morishita, M. Doi, T. Hori, H. Sakaguchi, and J.-P. Ampuero (2011), Gutenberg-Richter’s law in sliding friction of gels, J. Geophys. Res., 116, B12306, doi:10.1029/2011JB008415
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28957
Deposited By: Ruth Sustaita
Deposited On:25 Jan 2012 18:10
Last Modified:09 Nov 2021 17:02

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