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Transition dynamics and magic-number-like behavior of frictional granular clusters.

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Date
2012-07
Authors
Tordesillas, Antoinette
Walker, David M
Froyland, Gary
Zhang, Jie
Behringer, Robert P
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Abstract
Force chains, the primary load-bearing structures in dense granular materials, rearrange in response to applied stresses and strains. These self-organized grain columns rely on contacts from weakly stressed grains for lateral support to maintain and find new stable states. However, the dynamics associated with the regulation of the topology of contacts and strong versus weak forces through such contacts remains unclear. This study of local self-organization of frictional particles in a deforming dense granular material exploits a transition matrix to quantify preferred conformations and the most likely conformational transitions. It reveals that favored cluster conformations reside in distinct stability states, reminiscent of "magic numbers" for molecular clusters. To support axial loads, force chains typically reside in more stable states of the stability landscape, preferring stabilizing trusslike, three-cycle contact triangular topologies with neighboring grains. The most likely conformational transitions during force chain failure by buckling correspond to rearrangements among, or loss of, contacts which break the three-cycle topology.
Type
Journal article
Subject
Colloids
Computer Simulation
Friction
Models, Chemical
Models, Molecular
Phase Transition
Rheology
Shear Strength
Permalink
https://hdl.handle.net/10161/10952
Published Version (Please cite this version)
10.1103/PhysRevE.86.011306
Publication Info
Tordesillas, Antoinette; Walker, David M; Froyland, Gary; Zhang, Jie; & Behringer, Robert P (2012). Transition dynamics and magic-number-like behavior of frictional granular clusters. Phys Rev E Stat Nonlin Soft Matter Phys, 86(1 Pt 1). pp. 011306. 10.1103/PhysRevE.86.011306. Retrieved from https://hdl.handle.net/10161/10952.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Behringer

Robert P. Behringer

James B. Duke Professor of Physics
Dr. Behringer's research interests include granular materials: friction, earthquakes, jamming; nonlinear dynamics; and fluids: Rayleigh-Benard convection, the flow of thin liquid films, porous media flow, and quantum fluids. His studies focus particularly on experiments (with some theory/simulation) that yield new insights into the dynamics and complex behavior of these systems. His experiments involve a number of highly novel approaches, including the use of photoelasticity for probing granular
This author no longer has a Scholars@Duke profile, so the information shown here reflects their Duke status at the time this item was deposited.
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