Shearing of frictional sphere packings

Details Shearing of frictional sphere packings Shearing of frictional sphere packings

2010-12-22

arxiv.org/abs/1012.5023v2

J.-F. M\'etayer et al EPL 93 64003 (2011)

Physics

Condensed Matter

Soft Condensed Matter

minor changes, added reference

Scientific paper

We measure shear response in packings of glass beads by pulling a thin, rough, metal plate vertically through a bed of volume fraction phi, which is set, before the plate is pulled, in the range 0.575 to 0.628. The yield stress is velocity independent over 4 decades and increases exponentially with phi, with a transition at phi approximately 0.595. An analysis of the measured force fluctuations indicates that the shear modulus is significantly smaller than the bulk modulus.

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