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Coherent Force Chains in Disordered Granular Materials Emerge from a Percolation of Quasilinear Clusters

Krishnaraj, KP and Nott, PR (2020) Coherent Force Chains in Disordered Granular Materials Emerge from a Percolation of Quasilinear Clusters. In: Physical Review Letters, 124 (19).

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Official URL: https://doi.org/10.1103/PhysRevLett.124.198002


Dense granular materials and other particle aggregates transmit stress in a manner that belies their microstructural disorder. A subset of the particle contact network is strikingly coherent, wherein contacts are aligned nearly linearly and transmit large forces. Important material properties are associated with these force chains, but their origin has remained a puzzle. We classify subnetworks by their linear connectivity, and show the emergence of a percolation transition at a critical linearity at which the network is sparse, coherent, and contains the force chains. The subnetwork at critical linearity closely reflects the macroscopic stress and explains distinctive features of granular mechanics. © 2020 American Physical Society.

Item Type: Journal Article
Publication: Physical Review Letters
Publisher: American Physical Society
Additional Information: Copyright of this article belongs to American Physical Society
Keywords: Granular materials; Solvents, Dense granular materials; Granular mechanics; Macroscopic stress; Micro-structural; Particle aggregates; Particle contacts; Percolation transition; Quasi-linear, Aggregates, article; stress
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 07 Apr 2021 10:06
Last Modified: 07 Apr 2021 10:06
URI: http://eprints.iisc.ac.in/id/eprint/65859

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