Crossover from negative to positive shear rate dependence in granular friction
arXiv:1106.0101 · doi:10.1002/grl.50311
Abstract
We conduct an experiment on the frictional properties of granular matter over a wide range of shear rate that covers both the quasistatic and the inertial regimes. We show that the friction coefficient exhibits negative shear-rate dependence in the quasistatic regime, whereas the shear-rate dependence is positive in the inertial regime. This crossover from negative to positive shear-rate dependence occurs at a critical inertial number. This is explained in terms of the competition between two physical processes, namely frictional healing and anelasticity. We also find that the result does not depend on the shape of the grains and that the behavior in the inertial regime is quantitatively the same as that in numerical simulations.
4 pages
References in corpus (7)
- A constitutive law for dense granular flows
- Rheophysics of dense granular materials : Discrete simulation of plane shear flows
- Annular shear of cohesionless granular materials: from inertial to quasistatic regime
- On origami embeddings of flat tori
- Power-law friction in closely-packed granular materials
- Brownian forces in sheared granular matter
- Scaling of the critical slip distance in granular layers
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