Stick-slip Transition in the Scalar Arching Model

Details Stick-slip Transition in the Scalar Arching Model Stick-slip Transition in the Scalar Arching Model

1998-01-07

arxiv.org/abs/cond-mat/9801057v1

Physics

Condensed Matter

8 pages, latex, 6 eps figures, submitted to `Granular Matter'

Scientific paper

When some granular material contained into a silo is pushed upwards with a piston, an irregular stick-slip motion of the system of grains is observed. We show how one can adapt the `Scalar Arching Model' -- proposed as a model for giant stress fluctuations in silos -- in order to describe this stick-slip phenomenon. As a function of the sensitivity of the system to mechanical noise, the system exhibit two different phases: a `jammed' phase, and a `sliding' phase where irregular stick-slip is observed. We analyze the transition, which is found to be of mean-field type, and study the statistical properties of the intermittent stick-slip motion.

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