Universal features of the stick-slip dynamics of an intruder moving through a confined granular medium.

Journal Article (Journal Article)

Experiments and simulations of an intruder dragged by a spring through a two-dimensional annulus of granular material exhibit robust force fluctuations. At low packing fractions (ϕ<ϕ_{0}), the intruder clears an open channel. Above ϕ_{0}, stick-slip dynamics develop, with an average energy release that is independent of the particle-particle and particle-base friction coefficients but does depend on the width W of the annulus and the diameter D of the intruder. A simple model predicts the dependence of ϕ_{0} on W and D, allowing for a data collapse for the average energy release as a function of ϕ/ϕ_{0}. These results pose challenges for theories of mechanical failure in amorphous materials.

Full Text

Duke Authors

Cited Authors

  • Pugnaloni, LA; Carlevaro, CM; Kozlowski, R; Zheng, H; Kondic, L; Socolar, JES

Published Date

  • April 2022

Published In

Volume / Issue

  • 105 / 4

Start / End Page

  • L042902 -

PubMed ID

  • 35590619

Electronic International Standard Serial Number (EISSN)

  • 2470-0053

International Standard Serial Number (ISSN)

  • 2470-0045

Digital Object Identifier (DOI)

  • 10.1103/physreve.105.l042902


  • eng