FlowArrest Transitions in Frictional Granular Matter
Abstract
The transition between shearflowing and sheararrested states of frictional granular matter is studied using constantstress discrete element simulations. By subjecting a dilute system of frictional grains to a constant external shear stress and pressure, frictiondependent critical shear stress and density are clearly identified with both exhibiting a crossover between low and high friction. The critical shear stress bifurcates two nonequilibrium steady states: (i) steady state shear flow characterized by a constant deformation rate, and (ii) shear arrest characterized by temporally decaying creep to a statically stable state. The onset of arrest below critical shear stress occurs at a time $t_{c}$ that exhibits a heavytailed distribution, whose mean and variance diverge as a power law at the critical shear stress with a frictiondependent exponent that also exhibits a crossover between low and high friction. These observations indicate that granular arrest near critical shear stress is highly unpredictable and is strongly influenced by interparticle friction.
 Publication:

arXiv eprints
 Pub Date:
 September 2018
 arXiv:
 arXiv:1810.00043
 Bibcode:
 2018arXiv181000043S
 Keywords:

 Condensed Matter  Soft Condensed Matter
 EPrint:
 Phys. Rev. Lett. 122, 048003 (2019)