Discrete-element method analysis of the state parameter
File(s)
Accepted version
Author(s)
Huang, X
O'Sullivan, C
Hanley, KJ
Kwok, CY
Type
Journal Article
Abstract
Using a series of true triaxial simulations, this study shows that the particulate discrete-element method (DEM) can capture the state-dependent drained and undrained response that is typical for sands. The most significant finding is that relationships between the initial state parameter and both the dilatancy at the peak strength and the difference between the peak and critical state strengths observed in the DEM simulations lie within the range defined by the experimental data. As indicated by the DEM data, this relationship is independent of loading path (intermediate principal stress ratio). The correlations between the initial state parameter and both the peak strength and the stress ratio at the undrained instability state are qualitatively in accordance with previously published laboratory data. The DEM data agree well with the NorSand constitutive model. The relationships between the state parameter and both structural anisotropy at the peak stress and the coordination number are explored. These findings extend current understanding of the capacity of DEM to capture the mechanical behaviour of granular materials and highlight the possibility of using DEM as a tool when developing advanced constitutive models.
Date Issued
2014-12-01
Date Acceptance
2014-10-23
Citation
Geotechnique: international journal of soil mechanics, 2014, 64 (12), pp.954-965
ISSN
0016-8505
Publisher
ICE Publishing
Start Page
954
End Page
965
Journal / Book Title
Geotechnique: international journal of soil mechanics
Volume
64
Issue
12
Copyright Statement
© 2014 The ICE. Original article available at http://www.icevirtuallibrary.com/content/ add rest. Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
https://www.icevirtuallibrary.com/doi/10.1680/geot.14.P.013
Grant Number
EP/I006761/1
Subjects
Science & Technology
Technology
Engineering, Geological
Engineering
discrete-element modelling
shear strength
stress path
GRANULAR-MATERIALS
SAND
DILATANCY
STRENGTH
MODEL
LIQUEFACTION
ASSEMBLIES
PARTICLES
BEHAVIOR
STRAIN
0905 Civil Engineering
0907 Environmental Engineering
0914 Resources Engineering and Extractive Metallurgy
Geological & Geomatics Engineering
Publication Status
Published
Date Publish Online
2014-12-10