Dilatancy and Friction in sheared granular media
F. Lacombe, S. Zapperi, H. J. Herrmann
Abstract
We introduce a simple model to describe the frictional properties of granular media under shear. We model the friction force in term of the horizontal velocity v and the vertical position z of the slider, interpreting z as a constitutive variable characterizing the contact. Dilatancy is shown to play an essential role in the dynamic, inducing a stick-slip instability at low velocity. We compute the phase diagram, analyze numerically the model for a wide range of parameters and compare our results with experiments on dry and wet granular media, obtaining a good agreement. In particular, we reproduce the hysteretic velocity dependence of the frictional force.
Create a lesson
Related papers
Necessary conditions for benchmarking next-generation AI in materials discovery
Daniel E Widdowson, Tatiana V Kurlina, Olga D Anosova et al.
Doubly Metastable Synthesis for Accelerated Quantum Materials Discovery
Kyuho Lee, Berit H. Goodge, Soonhyun Kwon et al.
Phononic Frequency Combs in Twisted Bilayer Transition Metal Dichalcogenide Heterostructures from First Principles
Naman Arora, Adarsh Ganesan
Improved screening of doped ZrO2 catalysts for CO2 hydrogenation from graph-based machine learning
Karsten Walz Jensen, Mie Andersen, Raffaele Cheula
Dislocation mediated twin boundary faceting in β-Sn
John Israel, Ian Chesser, Khanh Dang et al.
Ferroelectric Domain-Wall Motion, Stability, and Frequency Responses under Different Screening-Charge Conservation Laws
Sergei V. Kalinin