Alignment-induced depression and shear thinning in granular matter of nonspherical particles
Huzaif Rahim, Vasileios Angelidakis, Thorsten Pöschel, Sudeshna Roy
Abstract
Shearing shape-anisotropic grains in a split-bottom shear cell form a localized shear band with a depression at its center. Our study reveals how particle alignment affects the packing density, stress distribution, macro-friction, viscosity, and shear-thinning behavior with the increase in the aspect ratio of the particles. A scaling law correlates the particle aspect ratio to macroscopic friction and effective viscosity, revealing shear-thinning behavior in the bulk and near the surface.
Topics & Concepts
ThinningShear (geology)Depression (economics)Shear thinningGeologyPhysicsMaterials scienceComposite materialRheologyEconomicsBiologyEcologyKeynesian economicsGranular flow and fluidized bedsGeotechnical Engineering and Soil MechanicsLandslides and related hazards