Footprints in sand: the response of a granular material to local perturbations.

نویسندگان

  • J Geng
  • D Howell
  • E Longhi
  • R P Behringer
  • G Reydellet
  • L Vanel
  • E Clément
  • S Luding
چکیده

We experimentally determine ensemble-averaged responses of granular packings to point forces, and we compare these results to recent models for force propagation in a granular material. We use 2D granular arrays consisting of photoelastic particles: either disks or pentagons, thus spanning the range from ordered to disordered packings. A key finding is that spatial ordering of the particles is a key factor in the force response. Ordered packings have a propagative component that does not occur in disordered packings.

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عنوان ژورنال:
  • Physical review letters

دوره 87 3  شماره 

صفحات  -

تاریخ انتشار 2001