Pressure screening and fluctuations at the bottom of a granular column
Laboratoire des Milieux Désordonnés et Hétérogènes, (UMR 7603 CNRS) Boîte 86, Université Pierre et Marie Curie, 4 Place Jussieu, 75005 Paris, France
Revised: 28 January 1999
Published online: 15 October 1999
We report sets of precise and reproducible measurements on the static pressure at the bottom of a granular column. We make a quantitative analysis of the pressure saturation when the column height is increased. We evidence a great sensitivity of the measurements with the global packing fraction and the eventual presence of shear bands at the boundaries. We also show the limit of the classical Janssen model and discuss these experimental results under the scope of recently proposed theoretical frameworks.
PACS: 61.43.Gt – Powders, porous materials / 81.05.Rm – Porous materials; granular materials / 83.70.Fn – Granular solids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999