Sensitivity of Granular Force Chain Orientation to Disorder-induced Metastable Relaxation

Abstract

A two-dimensional system of photoelastic disks subject to vertical tapping against gravity was experimentally monitored from ordered to disordered configurations by varying bidispersity. The packing fraction $\varphi$, coordination number $Z$, and an appropriately defined force chain orientational order parameter $S$, all exhibit similar sharp transition with small increase in disorder. A measurable change in $S$, but not $\varphi \&Z$, was detected under tapping. We find disorder-induced metastability does not show configurational relaxation, but can be detected via force chain reorientations.

5 pages, 3 figures

References in corpus (4)

• 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
• Structural evolution of a granular pack under manual tapping

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• Shape dependence of resistance force exerted on an obstacle placed in a gravity-driven granular silo flow
• Force Distributions in Frictional Granular Media
• Common Packing Patterns for Jammed Particles of Different Power Size Distributions
• Laboratory experiment and discrete-element-method simulation of granular-heap flows under vertical vibration
• Disordering two-dimensional magnet-particle configurations using bidispersity
• Geometry-dependent constitutive law for granular slow frictional drag