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
Language
- eng