Volume 74, Number 6, June 2006
|Page(s)||1116 - 1122|
|Section||Geophysics, astronomy, and astrophysics|
|Published online||24 May 2006|
Broad distribution of stick-slip events in Slowly Sheared Granular Media: Table-top production of a Gutenberg-Richter-like distribution
Department of Physics, University of Michigan - Ann Arbor, MI 48109, USA
2 Department of Statistics, University of Tennessee - Knoxville, TN 37996, USA
3 Department of Physics, Colorado State University - Fort Collins, CO 80523, USA
4 Frontier Research System, The Institute of Physical and Chemical Research (RIKEN) Saitama 351-0198, Japan
Accepted: 13 April 2006
We monitor the stick-slip displacements of a very slowly driven moveable perforated top plate which interacts via shearing with a packing of identical glass beads confined in a tray. When driven at a constant stress rate, the distributions of large event displacements and energies triggered by the stick-slip instabilities exhibit power law responses reminiscent of the Gutenberg-Richter law for earthquakes. Small events are quasi-size independent, signaling crossover from single-bead transport to collective behavior.
PACS: 91.30.Px – Earthquakes / 89.75.Da – Systems obeying scaling laws / 05.65.+b – Self-organized systems
© EDP Sciences, 2006
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