Onset of mechanical stability in random packings of frictional spheres

Melissa Jerkins; Matthias Schröter; Harry L. Swinney; Tim J. Senden; Mohammad Saadatfar; Tomaso Aste

doi:10.1103/PhysRevLett.101.018301

Onset of mechanical stability in random packings of frictional spheres

Melissa Jerkins^*, Matthias Schröter, Harry L. Swinney, Tim J. Senden, Mohammad Saadatfar, Tomaso Aste

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

153 Citations (Scopus)

Abstract

Using sedimentation to obtain precisely controlled packings of noncohesive spheres, we find that the volume fraction RLP of the loosest mechanically stable packing is in an operational sense well defined by a limit process. This random loose packing volume fraction decreases with decreasing pressure p and increasing interparticle friction coefficient μ. Using x-ray tomography to correct for a container boundary effect that depends on particle size, we find for rough particles in the limit p→0 a new lower bound, RLP=0.550±0.001.

Original language	English
Article number	018301
Journal	Physical Review Letters
Volume	101
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.101.018301
Publication status	Published - 2 Jul 2008

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abstract = "Using sedimentation to obtain precisely controlled packings of noncohesive spheres, we find that the volume fraction RLP of the loosest mechanically stable packing is in an operational sense well defined by a limit process. This random loose packing volume fraction decreases with decreasing pressure p and increasing interparticle friction coefficient μ. Using x-ray tomography to correct for a container boundary effect that depends on particle size, we find for rough particles in the limit p→0 a new lower bound, RLP=0.550±0.001.",

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AU - Saadatfar, Mohammad

AU - Aste, Tomaso

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AB - Using sedimentation to obtain precisely controlled packings of noncohesive spheres, we find that the volume fraction RLP of the loosest mechanically stable packing is in an operational sense well defined by a limit process. This random loose packing volume fraction decreases with decreasing pressure p and increasing interparticle friction coefficient μ. Using x-ray tomography to correct for a container boundary effect that depends on particle size, we find for rough particles in the limit p→0 a new lower bound, RLP=0.550±0.001.

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Onset of mechanical stability in random packings of frictional spheres

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