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Granular Matter

, Volume 14, Issue 2, pp 191–196 | Cite as

Granular packings of cohesive elongated particles

  • R. C. Hidalgo
  • D. KadauEmail author
  • T. Kanzaki
  • H. J. Herrmann
Original Paper

Abstract

We report numerical results of effective attractive forces on the packing properties of two-dimensional elongated grains. In deposits of non-cohesive rods in 2D, the topology of the packing is mainly dominated by the formation of ordered structures of aligned rods. Elongated particles tend to align horizontally and the stress is mainly transmitted from top to bottom, revealing an asymmetric distribution of local stress. However, for deposits of cohesive particles, the preferred horizontal orientation disappears. Very elongated particles with strong attractive forces form extremely loose structures, characterized by an orientation distribution, which tends to a uniform behavior when increasing the Bond number. As a result of these changes, the pressure distribution in the deposits changes qualitatively. The isotropic part of the local stress is notably enhanced with respect to the deviatoric part, which is related to the gravity direction. Consequently, the lateral stress transmission is dominated by the enhanced disorder and leads to a faster pressure saturation with depth.

Keywords

Granular matter Molecular dynamics Non-spherical particles quicksand Collapsible soil 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • R. C. Hidalgo
    • 1
  • D. Kadau
    • 2
    Email author
  • T. Kanzaki
    • 3
  • H. J. Herrmann
    • 2
    • 4
  1. 1.Departamento de Física y Matemática AplicadaUniversidad de NavarraPamplonaSpain
  2. 2.Institute for Building MaterialsETH ZürichZurichSwitzerland
  3. 3.Departament de FísicaUniversitat de GironaGironaSpain
  4. 4.Departamento de FísicaUniversidade Federal do CearáFortalezaBrazil

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