000182885 001__ 182885
000182885 005__ 20190104141502.0
000182885 0247_ $$2doi$$a10.1007/s00603-012-0348-5
000182885 022__ $$a0723-2632
000182885 02470 $$2ISI$$a000329997500006
000182885 037__ $$aARTICLE
000182885 245__ $$aHollow Cylinder Tests on Boom Clay: Modelling of Strain Localization in the Anisotropic Excavation Damaged Zone
000182885 269__ $$a2014
000182885 260__ $$aWien$$bSpringer Verlag$$c2014
000182885 300__ $$a16
000182885 336__ $$aJournal Articles
000182885 520__ $$aBoom Clay is extensively studied as a potential candidate to host underground nuclear waste disposal in Belgium. To guarantee the safety of such a disposal, the mechanical behaviour of the clay during gallery excavation must be properly predicted. In that purpose, a hollow cylinder experiment on Boom Clay has been designed to reproduce, in a small-scale test, the Excavation Damaged Zone (EDZ) as experienced during the excavation of a disposal gallery in the underground. In this paper, the focus is made on the hydro-mechanical constitutive interpretation of the displacement (experimentally obtained by medium resolution X-Ray tomography scanning). The coupled hydro-mechanical response of Boom Clay in this experiment is addressed through finite element computations with a constitutive model including strain hardening/softening, elastic and plastic cross-anisotropy and a regularisation method for the modelling of strain localization processes. The obtained results evidence the directional dependency of the mechanical response of the clay. The softening behaviour induces transient strain localization processes, addressed through a hydro-mechanical second grade model. The shape of the obtained damaged zone is clearly affected by the anisotropy of the materials, evidencing an eye-shaped excavation damaged zone. The modelling results agree with experiments not only qualitatively (in terms of the shape of the induced damaged zone) but also quantitatively (for the obtained displacement in three particular radial directions).
000182885 6531_ $$aNumerical modelling
000182885 6531_ $$aAnisotropy
000182885 6531_ $$aStrain localization
000182885 6531_ $$aBoom Clay
000182885 6531_ $$aHollow cylinder test
000182885 700__ $$aFrançois, Bertrand
000182885 700__ $$0241814$$aLabiouse, Vincent$$g114728
000182885 700__ $$aDizier, Arnaud
000182885 700__ $$aMarinelli, Ferdinando
000182885 700__ $$aCharlier, Robert
000182885 700__ $$aCollin, Frédéric
000182885 773__ $$j47$$k1$$q71–86$$tRock Mechanics and Rock Engineering
000182885 8564_ $$s1688623$$uhttps://infoscience.epfl.ch/record/182885/files/Fran%C3%A7ois%20Labiouse%20et%20al%20RMRE%20author%20version.pdf$$yPostprint$$zPostprint
000182885 909C0 $$0252061$$pLMR$$xU10258
000182885 909CO $$ooai:infoscience.tind.io:182885$$particle$$qENAC
000182885 917Z8 $$x114728
000182885 917Z8 $$x114728
000182885 917Z8 $$x114728
000182885 917Z8 $$x114728
000182885 937__ $$aEPFL-ARTICLE-182885
000182885 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000182885 980__ $$aARTICLE