Skip to main content

MultiScale Material Science for Energy and Environment

Logo MultiScale Material Science

MultiScale Materials Science for Energy and Environment

  • Home
  • The Lab
  • People
  • Publications
  • News / Events
  • GDRI
  • Home
  • The Lab
    • The Lab
    • Research
    • Education
    • Amazing People
    • Contact
  • People
  • Publications
  • News / Events
    • News
    • Seminars
    • Conferences
    • Winter School
  • GDRI
    • Presentation

Effect of Particle Shape non-Convexity on the Rheology of Granular Media : 3D Contact Dynamics Simulations

TitleEffect of Particle Shape non-Convexity on the Rheology of Granular Media : 3D Contact Dynamics Simulations
Publication TypeConference Proceedings
Year of Publication2012
AuthorsSaint-Cyr B, Azéma E, Delenne J-Y, Radjaï F, Sornay P
EditorOnate E, Owen DRJ
SponsorCatalonia TUnive, Swansea Univ, ECCOMAS) ECommunity, IACM) IAssoc Comp
Conference Name2nd International Conference on Particle-Based Methods - Fundamentals and Applications (Particles)
VolumePARTICLE-BASED METHODS II: FUNDAMENTALS AND APPLICATIONS
Pagination427-434
Date PublishedApr-10-2012
Conference LocationOCT 26-28 2011 Barcelona, SPAIN
Keywordsforce transmission, Granular Materials, non-convexity, particle shape, texture
Abstract

We analyze the effect of particle shape non-convexity on the quasi-static behavior of granular materials by means of contact dynamics simulations. The particles are regular aggregates of four overlapping spheres described by a nonconvexity parameter depending on the relative positions of the particles. Several packings are first submitted to isotropic compression without friction. We find that, as in 2D, the solid fraction of isotropic packings increases with non-convexity up to a maximum value and then declines to be nearly equal to that of a packing composed of only spheres. It is also remarkable that the coordination number increases quickly and saturates so that the packings composed of grains with a high level of nonconvexity are looser but more strongly connected. Then, the quasi-static behavior, structural and force anisotropies are analyzed by subjecting each packing to a triaxial compression. We find that the shear strength increases with non-convexity. We show that this increase results from the presence of multiple contacts between trimers leading to enhanced frictional interlocking.

URLhttps://hal.archives-ouvertes.fr/hal-00686453
  • BibTex
  • RIS

Login using Touchstone
  • MIT
  • CNRS
  • INVESTISSEMENT D'AVENIR
  • CINAM
  • MITEI
  • AMU