Reference : A Discrete Element Framework for Modeling the Mechanical Behaviour of Snow PART I: Me...

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering
	Focus Areas :	Computational Sciences
	To cite this reference:	http://hdl.handle.net/10993/45219

Title :	A Discrete Element Framework for Modeling the Mechanical Behaviour of Snow PART I: Mechanical Behaviour and Numerical Model
Language :	English
Author, co-author :	Kabore, Brice Wendlassida [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) >]
	Peters, Bernhard [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) >]
	Michael, Mark []
	Francois, Nicot []
Publication date :	7-Apr-2021
Journal title :	Granular Matter
Publisher :	Springer
Volume :	23
Issue/season :	2
Pages :	42
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	1434-5021
e-ISSN :	1434-7636
Country :	Germany
Keywords :	[en] Snow Behaviour, Micro-mechanical Model, Brittle Fracture, Ductile Failure, Discrete Element Method (DEM), Ice, micro-structure
Abstract :	[en] A framework for investigating the mechanics of snow is proposed based on an advanced micro-scale approach. Varying strain rates, densities and temperatures are taken into account. Natural hazards i.e. snow avalanches are triggered by snow deforming at low rates, while a large group of industrial applications concerning driving safety or winter sport activities require an understanding of snow behaviour under high deformation rates. On the micro-scale, snow is considered to consist of ice grains joined by ice bonds to build a porous structure. Deformation and failure of bonds and the inter-granular collisions of ice grains determine the macroscopic response under mechanical load. Therefore, this study proposes an inter-granular bond and collision model for snow based on the discrete element method (DEM) to describe interaction on a grain-scale. It aims at predicting the mechanical behaviour of ice particles under different strain rates using a unified approach. Thus, the proposed algorithm predicts the displacement of each individual grains due to inter-granular forces and torques that derive from bond deformation and grain collision. For this purpose, the inter-granular characteristics are approximated by an elastic viscous-plastic material law which is based on the temperature-dependent properties of poly-crystalline ice Ih.
Target :	General public
Permalink :	http://hdl.handle.net/10993/45219
DOI :	10.1007/s10035-020-01083-1
FnR project :	FnR ; FNR10377358 > Bernhard Peters > SnowDEM > Development of a microstructure based discrete element snow model for engineeringapplications (SnowDEM) > 15/10/2016 > 14/10/2019 > 2015

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