Quantitative understanding of the onset of dense granular flows
arXiv:2202.00041 · doi:10.1103/PhysRevLett.130.108201
Abstract
The question when and how dense granular materials start to flow under stress, despite many industrial and geophysical applications, remains largely unresolved. We develop and test a simple equation for the onset of quasi-static flows of granular materials which is based on the frictional aging of the granular packing. The result is a non-monotonic stress-strain relation which - akin to classical friction - is independent of the shear rate. This relation suffices to understand the below-threshold deformations of aging granular media, and its solid-to-liquid transition. Our results also elucidate the (flow) history dependence of the mechanical properties, and the sensitivity to initial preparation of granular media.
arXiv comment5 pages, 3 figures
References in corpus (16)
- A constitutive law for dense granular flows
- Yield Stress Materials in Soft Condensed Matter
- Analysis of Granular Flow in a Pebble-Bed Nuclear Reactor
- Creep motion in a granular pile exhibiting steady surface flow
- Particle dynamics in sheared granular matter
- Logarithmic rate dependence in deforming granular materials
- Reynolds Pressure and Relaxation in a Sheared Granular System
- Nonmonotonic Aging and Memory Retention in Disordered Mechanical Systems
- Stress-aging in the electron-glass
- Granular dynamics in compaction and stress relaxation
- Glassy dynamics of landscape evolution
- Stress Overshoots in Simple Yield Stress Fluids
- Dynamic weakening by acoustic fluidization during stick-slip motion
- Controlled viscosity in dense granular materials
- Sheared Amorphous Packings Display Two Separate Particle Transport Mechanisms
- A relaxation constant in the folding of thin viscoelastic sheets