Journal
PHYSICAL REVIEW LETTERS
Volume 101, Issue 26, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.268301
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Funding
- US-Israel Binational Science Foundation [2004391, NSF-DMR0549762]
- [NSF-DMR0555431]
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Recent experiments exhibit a rate dependence for granular shear such that the stress grows linearly in the logarithm of the shear rate, gamma. Assuming a generalized activated process mechanism, we show that these observations are consistent with a recent proposal for a stress-based statistical ensemble. By contrast, predictions for rate dependence using conventional energy-based statistical mechanics to describe activated processes, predicts a rate dependence of (ln(gamma))(1/2).
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