Work

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

Year: 2016

Type: article

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 ϕ, coordination number Z, and an appropriately defined force-chain orientational order parameter S all exhibit as similar sharp transition with a small increase in disorder. A measurable change in S, but not ϕ and Z, was detected under tapping. We find disorder-induced metastability does not show configurational relaxation, but can be detected via force-chain reorientations.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.116.128001

Authors: N. Iikawa, M. M. Bandi, H. Katsuragi

Institutions: Nagoya University, Okinawa Institute of Science and Technology Graduate University

Language: English

Topic: Granular flow and fluidized beds

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Okinawa Institute of Science and Technology Graduate University, Japan Society for the Promotion of Science

Award: Stress chain structure in the loaded granular bed and the fundamental physics of terramehanics