System Size Dependence in Shear Jamming of 2D Frictional Grains

ORAL

Abstract

Shear jamming (SJ) occurs for frictional granular materials with packing fractions (Φ) in a finite range below the isotropic jamming point, when the material is subject to a sufficiently large shear strain, γSJ, starting from a force-free state. Here we report experimental studies on the system size dependence for a quasi-2D frictional system composed of bidisperse photoelastic disks. The number of particles in the system ranges from 60 to 3000 by varying particle diameters while maintaining the number and size ratio between big and small disks the same. We observe that γSJ increases with system size at the same Φ for systems with less than 1000 particles, reminiscent of a recent simulation work (Baity-Jesi et al., J. Stat. Phys. 167, 735 (2017)). However, such a dependence is much weaker comparing systems with 1000 and 3000 particles. Our results imply that SJ still exists in frictional granular materials in the thermodynamic limit.

*We acknowledge support from NSF DMR1206351 and DMR1809762, NASA NNX15AD38G, DARPA 4-34728, the W. M. Keck Foundataion and a Research Triangle MRSEC Fellowship.

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Presenters

  • Dong Wang

    • Duke University
    • Physics Department, Duke University

Authors

  • Dong Wang

    • Duke University
    • Physics Department, Duke University

  • Hu Zheng

    • Physics, Duke University
    • Duke University
    • Duke University/Hohai University
    • Physics Department, Duke University

  • Jonathan Bares

    • University of Montpellier
    • Laboratoire de M\'{e}canique et G\'{e}nie Civil, Universit\'{e} de Montpellier
    • CNRS

  • Robert P Behringer

    • Department of Physics, Duke University, Durham, NC, USA
    • Physics, Duke University
    • Duke University
    • Physics Department, Duke University