000268548 001__ 268548
000268548 005__ 20190812204806.0
000268548 037__ $$aCONF
000268548 245__ $$aPropagation of a planar hydraulic fracture perpendicular to the isotropy plane of a transversely isotropic material
000268548 260__ $$b53rd US Rock Mechanics/Geomechanics Symposium$$aNew-York, USA$$c2019-06-23
000268548 269__ $$a2019-06-23
000268548 300__ $$a11
000268548 336__ $$aConference Papers
000268548 520__ $$aWe investigate the case of a hydraulic fracture (HF) propagating perpendicular to the isotropy plane of a transversely isotropic material: a relevant configuration for the growth of HFs in sedimentary rocks where fractures are propagating vertically across layers. We extend the implicit level set algorithm originally developed for the propagation of planar 3D HF in isotropic media to transverse isotropy (TI) of elasticity and toughness. Contrary to the isotropic case, the near-tip plane strain elastic relation depends on the angle α between the local propagation direction and the isotropy plane. We present an analytical solution for an elliptical HF in the toughness dominated regime and use it to benchmark our numerical solver. For a TI elastic material, we investigate HF growth for two different assumptions: isotropic material toughness or isotropic critical fracture energy. In both cases, we compare the fracture aspect ratio obtained by our numerical results with simplified estimations based on the minimization of the variation of local stress intensity factor (or energy release rate) under the assumption of an elliptical fracture. Our numerical results show that for both assumptions, the fracture aspect ratio inversely scales with the ratio of plane-strain elastic modulus in the two orthogonal directions of the material frame with a different exponent. However, the fracture is never strictly elliptical, except for a very peculiar form of toughness anisotropy.
000268548 700__ $$0249657$$aMoukhtari, Fatima-Ezzahra$$g263308
000268548 700__ $$0249164$$aLecampion, Brice$$g258069
000268548 700__ $$0249633$$aZia, Haseeb$$g264548
000268548 7112_ $$a53rd US Rock Mechanics/Geomechanics Symposium $$cNew-York, USA$$dJune, 23-26, 2019
000268548 773__ $$tProceedings of the 53rd US Rock Mechanics/Geomechanics Symposiu
000268548 8560_ $$ffatima-ezzahra.moukhtari@epfl.ch
000268548 8564_ $$uhttps://infoscience.epfl.ch/record/268548/files/ARMA2018_FMBL.pdf$$zPREPRINT$$s2013441
000268548 909C0 $$pGEL$$mbrice.lecampion@epfl.ch$$0252543$$zPasquier, Simon$$xU13064
000268548 909CO $$pconf$$pENAC$$ooai:infoscience.epfl.ch:268548
000268548 960__ $$afatima-ezzahra.moukhtari@epfl.ch
000268548 961__ $$aalain.borel@epfl.ch
000268548 973__ $$aEPFL$$rREVIEWED
000268548 980__ $$aCONF
000268548 981__ $$aoverwrite