Skip to Main content Skip to Navigation
Theses

Etude de la réponse au cisaillement d'un milieu granulaire humide non-saturé.

Abstract : This work is an experimental study of the effects of moisture on the response of a granular medium to shear.
The shear stress changes from a ”noisy” behavior to a ”stick-slip” behavior, to the ”noisy” behavior again when
the water content increases in the granular medium. A study of the maxima and of the amplitude of fluctuations of
the shear stress was made, in order to analyze the static and dynamic states during shearing. The increase of the
average value of the maxima in shear stress as a function of the water content agrees with the model of Halsey and
Levine in the static case. In the dynamic case, the study of the amplitude of the fluctuations of the shear stress
reveals three states corresponding to increasing levels of humidity in the surrounding atmosphere : a granular state,
a correlated state and a viscoplastic state (terminology introduced by Tegzes). A model of cohesion was studied
numerically with the molecular dynamics method on a two-dimensional system; this model allows us to get insights
into the dynamics of the shearing band. We also showed experimentally that moisture has not only spacial effects
but also temporal effects (ageing) on the sheared granular medium.
Complete list of metadatas

Cited literature [79 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00110199
Contributor : Oliver Pozo <>
Submitted on : Thursday, October 26, 2006 - 5:03:51 PM
Last modification on : Monday, October 12, 2020 - 10:27:35 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 9:07:55 PM

Identifiers

  • HAL Id : tel-00110199, version 1

Collections

Citation

Oliver Pozo. Etude de la réponse au cisaillement d'un milieu granulaire humide non-saturé.. Analyse de données, Statistiques et Probabilités [physics.data-an]. Université Nice Sophia Antipolis, 2006. Français. ⟨tel-00110199⟩

Share

Metrics

Record views

264

Files downloads

2220