ORBi: Levasseur Séverine - Damage modelling in geotechnics: micromechanical approaches

Reference : Damage modelling in geotechnics: micromechanical approaches


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Civil engineering
	To cite this reference:	http://hdl.handle.net/2268/66653

Title :	Damage modelling in geotechnics: micromechanical approaches
Language :	English
Author, co-author :	Levasseur, Séverine [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
	Collin, Frédéric [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
	Charlier, Robert [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
	Zhu, Qizhi [Université Paris Est > > > >]
	Kondo, Djimédo [> Laboratoire de mécanique de Lille > > >]
Publication date :	2010
Main document title :	EUROCK2010: Rock Mechanics in Civil and Environmental Engineering
Editor :	Zhao, Jian
	Labiouse, Vincent
	Dudt, Jean-Paul
	Mathier, Jean-François
Publisher :	CRC Press Balkema
Pages :	149-152
On invitation :	No
Audience :	International
ISBN :	978-0-415-58654-2
City :	London
Country :	UK
Event name :	EUROCK 2010
Event date :	15-18 juin 2010
Event organizer :	EPFL
Event place (city) :	Lausanne
Event country :	Suisse
Abstract :	[en] The mechanical behaviours of geomaterials are significantly affected by the presence of voids or cracks-like defects. The modelling of such behaviour is classically performed by considering purely macroscopic or micromechanically-based damage models. In the perspective of applications in civil engineering or in geomechanics, we propose in this paper to evaluate a homogenization approach, based on Mori-Tanaka scheme, applied to microcracked materials. In order to provide an appropriate interpretation of the nonlinear behaviour at macro-scale, the crack-induced damage is coupled to friction phenomena on closed cracks lips. The predictions of the coupled model are first analysed on laboratory tests performed on Callovo-Oxfordian Clay. Then, they are extended to a numerical analysis of excavation damaged zones around tunnels.
Permalink :	http://hdl.handle.net/2268/66653

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