Reference : On micromechanical damage modeling in geomechanics: influence of numerical integration s...
Scientific journals : Article
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/131025
On micromechanical damage modeling in geomechanics: influence of numerical integration scheme
English
Levasseur, Séverine mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Collin, Frédéric mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Charlier, Robert mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Kondo, Djimédo []
2013
International Journal of Computational & Applied Mathematics
Research India Publications
246
215-224
Yes (verified by ORBi)
International
1819-4966
[en] Anisotropic damage ; Initial stresses ; Micromechanics ; Microcracked geomaterials ; Tunnel excavation ; Numerical integration
[en] Tunnel excavations in deep rocks provide stress perturbations which initiate diffuse and/or localized damage propagation in the material. This damage phenomenon can lead to significant irreversible deformations and changes in rock properties. In this paper, we propose to model such behavior by considering a micromechanically-based damage approach. The resulting micromechanical model, which also accounts for initial stress, is described and assessed through the numerical analysis of a synthetic tunnel drilling in Opalinus Clay. A particular emphasis is put on the numerical integration of the model. In particular, an appropriate choice of the latter is required to ensure the numerical stability and a confident prediction of excavation damaged zone around tunnels.
http://hdl.handle.net/2268/131025
10.1016/j.cam.2012.05.022

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