Phase transition in a static granular system

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We find that a column of glass beads exhibits a well-defined transition between two phases that differ in their resistance to shear. Pulses of fluidization are used to prepare static states with well-defined particle volume fractions $ϕ$ in the range 0.57-0.63. The resistance to shear is determined by slowly inserting a rod into the column of beads. The transition occurs at $ϕ=0.60$ for a range of speeds of the rod.
4 pages, 4 figures. The paper is significantly extended, including new data

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/128673

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0606459
 http://arxiv.org/abs/cond-mat/0606459
 EPL 78 (2007) 44004
 doi:10.1209/0295-5075/78/44004

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arXiv