Does gravity cause load-bearing bridges in colloidal and granular systems?

M. C. Jenkins, M. D. Haw, G. C. Barker, W. C. K. Poon, S. U. Egelhaaf

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16 Citations (Scopus)
120 Downloads (Pure)


We study structures which can bear loads, "bridges", in particulate packings. To investigate the relationship between bridges and gravity, we experimentally determine bridge statistics in colloidal packings. We vary the effective magnitude and direction of gravity, volume fraction, and interactions, and find that the bridge size distributions depend only on the mean number of neighbors. We identify a universal distribution, in agreement with simulation results for granulars, suggesting that applied loads merely exploit preexisting bridges, which are inherent in dense packings.

Original languageEnglish
Article number038302
Number of pages4
JournalPhysical Review Letters
Issue number3
Publication statusPublished - 15 Jul 2011


  • hard sphere
  • comptuer simulation
  • crystal nucleation
  • crystallisation
  • suspensions
  • microscopy
  • particles
  • packing
  • matter


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