Article (Scientific journals)
A Discrete Element Framework for Modeling the Mechanical Behaviour of Snow PART II: Model Validation
Peters, Bernhard; Kabore, Brice Wendlassida; Mark, Michael et al.
2021In Granular Matter, 23 (2), p. 43
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Keywords :
Snow Behaviour; Micro-mechanical Model; Brittle Fracture; Ductile Failure; micro-structure; Discrete Element Method (DEM); Ice
Abstract :
[en] A micro-scale modelling approach of snow based on the extension of the classical discrete element method (DEM) has been presented in the first part of this study. This modelling approach is employed to predict the mechanical response of snow under compression dependent on strain rate, initial density and temperature. Results obtained under a variety of conditions are validated with experimental data for both micro- and macro-scale, in particular the broad range between ductile i.e.~low deformation rates and brittle i.e.~high deformation rates regimes are investigated. For this purpose snow is assumed to be composed of ice grains that are inter-connected by a network of bonds between neighbouring grains. This arrangement represents the micro-scale of which the interaction is described by inter-granular collision and bonding. Hence, the response on a macro-scale is largely determined by inter-granular collisions and deformation and failure of bonds during a loading cycle. Consequently, validation was first carried out on micro-scale deformations at different loading rates and temperatures. Hereafter, macro-scale simulations of confined and unconfined, deformation-controlled compression tests have been predicted and were successfully compared to experimental data reported in literature.
Disciplines :
Materials science & engineering
Author, co-author :
Peters, Bernhard ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
Kabore, Brice Wendlassida ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
Mark, Michael
Francois, Nicot
External co-authors :
yes
Language :
English
Title :
A Discrete Element Framework for Modeling the Mechanical Behaviour of Snow PART II: Model Validation
Publication date :
07 April 2021
Journal title :
Granular Matter
ISSN :
1434-7636
Publisher :
Springer, Germany
Volume :
23
Issue :
2
Pages :
43
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Computational Sciences
FnR Project :
FNR10377358 - Development Of A Microstructure Based Discrete Element Snow Model For Engineering Applications (Snowdem), 2015 (15/10/2016-14/10/2019) - Bernhard Peters
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