Anomalous density dependence of static friction in sand

Viktor K. Horváth, Imre M. Jánosi, Péter J. Vella

Research output: Contribution to journalArticle

28 Citations (Scopus)


We measured experimentally the static friction force [Formula Presented] on the surface of a glass rod immersed in dry sand. We observed that [Formula Presented] is extremely sensitive to the closeness of packing of grains. A linear increase of the grain density yields to an exponentially increasing friction force. We also report on the periodicity of [Formula Presented] during gradual pulling out of the rod. Our observations demonstrate the central role of grain bridges and arches in the macroscopic properties of granular packings.

Original languageEnglish
Pages (from-to)2005-2009
Number of pages5
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Issue number2
Publication statusPublished - Jan 1 1996

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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