%0 Journal Article
%T Probing relevant ingredients in mean-field approaches for the athermal rheology of yield stress materials
%+ Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy)
%+ Institut de Mathématiques de Marseille (I2M)
%A Puosi, Francesco
%A Olivier, Julien
%A Martens, Kirsten
%Z Rhône-Alpes CPER07-13
%< avec comité de lecture
%@ 1744-683X
%J Soft Matter
%I Royal Society of Chemistry
%V 11
%N 38
%P 7639-7647
%8 2015
%D 2015
%Z 1501.04574
%R 10.1039/C5SM01694K
%Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]Journal articles
%X Although the notion of mechanical noise is expected to play a key role in the non-linear rheology of athermally sheared amorphous systems, its characterization has so far remained elusive. Here, we show using molecular dynamic simulations that in spite of the presence of strong spatio-temporal correlations in the system, the local stress exhibits normal diffusion under the effect of the mechanical noise in the finite driving regime. The diffusion constant appears to be proportional to the mean plastic activity. Our data suggests that the corresponding proportionality constant is density independent, and can be directly related to the specific form of the rheological flow curve, pointing the way to a generic way of modeling mechanical noise in mean-field equations.
%G English
%2 https://hal.science/hal-01263149/document
%2 https://hal.science/hal-01263149/file/c5sm01694k.pdf
%2 https://hal.science/hal-01263149/file/figure1.pdf
%2 https://hal.science/hal-01263149/file/figure2.pdf
%2 https://hal.science/hal-01263149/file/figure3.pdf
%2 https://hal.science/hal-01263149/file/figure4.pdf
%2 https://hal.science/hal-01263149/file/figure5.pdf
%2 https://hal.science/hal-01263149/file/header_bar.pdf
%2 https://hal.science/hal-01263149/file/journal_name.pdf
%L hal-01263149
%U https://hal.science/hal-01263149
%~ UGA
%~ CNRS
%~ UNIV-GRENOBLE1
%~ UNIV-AMU
%~ INPG
%~ EC-MARSEILLE
%~ INSMI
%~ OPENAIRE
%~ I2M
%~ I2M-2014-
%~ LIPHY
%~ ANR