| Issue |
Europhys. Lett.
Volume 67, Number 2, July 2004
|
|
|---|---|---|
| Page(s) | 205 - 211 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2004-10061-5 | |
| Published online | 01 July 2004 | |
Elastic energy, fluctuations and temperature for granular materials
1
Department of Mathematical Sciences & Center for Applied Mathematics & Statistics New Jersey Institute of Technology, Newark, NJ 07102, USA
2
Department of Physics and Center for Nonlinear and Complex Systems Duke University, Durham, NC 27708-0305, USA
Received:
11
February
2004
Accepted:
7
May
2004
We probe, using a model system, elastic and kinetic energies for
sheared granular materials. For large enough 
(pressure/Young's modulus) and 
(P/kinetic energy
density) elastic dominates kinetic energy, and energy fluctuations
become primarily elastic in nature. This regime has likely been
reached in recent experiments. We consider a generalization of
the granular temperature, 
, with both kinetic and
elastic terms and that changes smoothly from one regime to the
other. This is roughly consistent with a temperature
adapted from equilibrium statistical mechanics.
PACS: 45.70.-n – Granular systems / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 64.70.Pf – Glass transitions
© EDP Sciences, 2004
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