Details

Autor(en) / Beteiligte

• Behringer, R P
• Bi, Dapeng
• Chakraborty, B
• Henkes, S
• Hartley, R R

Titel

Why do granular materials stiffen with shear rate? Test of novel stress-based statistics

Ist Teil von

• Physical review letters, 2008-12, Vol.101 (26), p.268301-268301, Article 268301

Ort / Verlag

United States

Erscheinungsjahr

2008

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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).