Force fluctuations in a vertically pushed granular column

  • E. Kolb
  • T. Mazozi
  • E. Clément
  • J. Duran

Abstract:

We present series of experiments on the resistance force encountered by a bottom piston pushing a vertical granular column confined in a two-dimensional cell. We show that, due to the presence of friction at the boundaries and between the grains, the signal shows many complex features. At slow driving velocities, we observe a transition to a stick-slip dynamic instability. Depending on the granular material used, the elementary stick-slip events may either be well characterized or largely distributed. We present a statistical study on the waiting time between events and the distribution of energy release as a function of the spring stiffness and the driving velocity.

PACS. 46.10.+z Mechanics of discrete systems - 05.40.+j Fluctuation phenomena, random processes, and Brownian motion - 83.70.Fn Granular solids 

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Copyright information

© EDP Sciences, Springer-Verlag 1999

Authors and Affiliations

  • E. Kolb
    • 1
  • T. Mazozi
    • 1
  • E. Clément
    • 1
  • J. Duran
    • 1
  1. 1.Laboratoire des Milieux Désordonnés et Hétérogènes (UMR 7603), Université Pierre et Marie Curie, Boîte 86, 4 Place Jussieu, 75005 Paris, FranceFR

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