Stochastic model for the micromechanics of jammed granular materials: Experimental studies and numerical simulations

Mathias Tolomeo, Kuniyasu Saitoh, Combe Gaël, Stefan Luding, Vanessa Magnanimo, Vincent Richefeu, Gioacchino Viggiani

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    Abstract

    To describe statistical properties of complicated restructuring of the force network under isotropic compression, we measure the conditional probability distributions (CPDs) of changes of overlaps and gaps between neighboring particles by experiments and numerical simulations. We find that the CPDs obtained from experiments on a 2D granular material exhibit non-Gaussian behavior, which indicates strong correlations between the configurations of overlaps and gaps before and after deformation. We also observe the non-Gaussian CPDs by molecular dynamics simulations of frictional disks in two dimensions. In addition, the numerically calculated CPDs are well described by q-Gaussian distribution functions, where the q-indices agree well with those from experiments.

    Original languageEnglish
    Article number02021
    JournalEPJ Web of Conferences
    Volume140
    DOIs
    Publication statusPublished - 30 Jun 2017
    Event8th International Conference on Micromechanics on Granular Media, Powders & Grains 2017 - Montpellier, France
    Duration: 3 Jul 20177 Jul 2017
    Conference number: 8
    http://pg2017.org/en/

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