Implementation of rotational resistance models: a critical appraisal
File(s)
Accepted version
Supporting information
Author(s)
Huang, X
Hanley, K
O'Sullivan, C
Kwok, CY
Type
Journal Article
Abstract
Contact models that simulate rotational resistance at the particle contacts have been proposed as a means to capture the shape effect in DEM simulations. This contribution critically explores some of the key issues relating to implementation of rotational resistance models; these include the need for physically meaningful model parameters, the impact of the model on the overall numerical stability / critical time increment for the DEM model, model validation and assessment of model performance relative to real physical materials. The discussion is centred around a rotational resistance model that captures the resistance provided by interlocking asperities on the particle surface. An expression for the maximum permissible integration timestep to ensure numerical stability is derived for DEM simulations when rotational resistance is incorporated. Analytical solutions for some single-contact scenarios are derived for model validation. The ability of this type of model to provide additional fundamental insight into granular material behaviour is demonstrated by using particle-scale analysis of triaxial compression simulations to examine the roles that contact rolling and sliding have on the stability of strong force chains.
Date Issued
2017-03-28
Date Acceptance
2016-08-23
Citation
Particuology, 2017, 34, pp.14-23
ISSN
1674-2001
Publisher
Elsevier
Start Page
14
End Page
23
Journal / Book Title
Particuology
Volume
34
Copyright Statement
© 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/I006761/1
Subjects
Science & Technology
Technology
Engineering, Chemical
Materials Science, Multidisciplinary
Engineering
Materials Science
Granular media
Particle shape
Discrete element method
Rolling
Twisting
Rotational resistance
INCORPORATING ROLLING RESISTANCE
DISCRETE ELEMENT SIMULATIONS
GRANULAR MEDIA
PARTICLE-SHAPE
SURFACE-ROUGHNESS
BEHAVIOR
ANISOTROPY
STIFFNESS
DILATANCY
STRENGTH
0904 Chemical Engineering
0913 Mechanical Engineering
Chemical Engineering
Publication Status
Published