Mechanical properties of inclined frictional granular layers

Abstract

We investigate the mechanical properties of inclined frictional granular layers prepared with different protocols by means of DEM numerical simulations. We perform an orthotropic elastic analysis of the stress response to a localized overload at the layer surface for several substrate tilt angles. The distance to the unjamming transition is controlled by the tilt angle $\alpha$ with respect to the critical angle ${\alpha }_c$. We find that the shear modulus of the system decreases with $\alpha$, but tends to a finite value as $\alpha \to {\alpha }_c$. We also study the behaviour of various microscopic quantities with $\alpha$, and show in particular the evolution of the contact orientation with respect to the orthotropic axes and that of the distribution of the friction mobilisation at contact.

9 pages, 6 figures. Granular Matter (2014), Special Issue in honor of Bob Behringer

References in corpus (7)

• Jamming at Zero Temperature and Zero Applied Stress: the Epitome of Disorder
• The Jamming Transition in Granular Systems
• Jamming of frictional spheres and random loose packing
• Internal states of model isotropic granular packings. I. Assembling process, geometry and contact networks
• Force Mobilization and Generalized Isostaticity in Jammed Packings of Frictional Grains
• Elementary Excitation Modes in a Granular Glass above Jamming
• Evidence of Raleigh-Hertz surface waves and shear stiffness anomaly in granular media

Cited by in corpus (1)

• Jamming transition in a two-dimensional open granular pile with rolling resistance