@inproceedings{69a9b803ca554d6c9993f5f159faae1a,
title = "A micromechanical analysis on permeability evolutions of a dilatant shear band",
abstract = "This paper presents a multi-scale lattice Boltzmann/finite element scheme that quantitatively links particulate mechanics to hydraulic properties of a grain assembly obtained from a simple shear discrete element simulation. A spatial homogenization is performed to recover the macroscopic stress from the micro-mechanical force chances. The pore geometries the shear band and host matrix are then quantitatively evaluated through morphology analysis and flow simulations. Hydraulic properties estimated from multiscale flow simulations are compared with those inferred from volume averaging and geometric averaging schemes. Results from the discrete element simulations imply that grain sliding and rotation occur predominately within the dilatant shear band. These granular motions lead to dilation of pore space inside the shear band and increases in local permeability. While considerable anisotropy in the contact fabric is observed within the shear band, anisotropy of the permeability is, at most, modest in the assemblies composed of spherical grains.",
author = "Sun, {Wai Ching} and Kuhn, {Matthew R.} and Rudnicki, {John W.}",
note = "Publisher Copyright: Copyright {\textcopyright} 2014 ARMA, American Rock Mechanics Association.; 48th US Rock Mechanics / Geomechanics Symposium 2014: Rock Mechanics Across Length and Time Scales ; Conference date: 01-06-2014 Through 04-06-2014",
year = "2014",
language = "English (US)",
series = "48th US Rock Mechanics / Geomechanics Symposium 2014",
publisher = "American Rock Mechanics Association (ARMA)",
pages = "1305--1310",
editor = "Lee Petersen and Ray Sterling and Emmanuel Detournay and Will Pettitt and Labuz, {Joseph F.}",
booktitle = "48th US Rock Mechanics / Geomechanics Symposium 2014",
}