https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55748 Wed 19 Jun 2024 15:44:47 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32678 2D-Flow) code. In this simulator, the heterogeneity of rock is considered by assuming the material properties of the mesoscopic elements conform to a Weibull distribution and a statistical damage constitutive model based on elastic damage mechanics and the flow–stress–damage (FSD) coupling model. The numerical simulations reproduced the failure processes and failure patterns in detail, and the numerical results about permeability–strain qualitatively agree with the experimental results by assigning different parameters in the FSD model. Finally, the experimental results about relationship between permeability evolution and volumetric strain are discussed.]]> Tue 13 Aug 2019 16:18:16 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32079 3D as the basis and by introducing the zone state index (ZSI) into the volumetric strain, the relationship between ZSI and permeability is established. Numerical simulations are conducted to verify experimental results by adopting a nonlinear creep Nishihara model based on the strain softening. The results show that the permeability along with the development of the time in the process of loading near the inlet side of the permeability changes quickly. The damaged area of ZSI contours is coincided basically with the failure mode of the test samples in the "V"-typed shear zone. The theoretical curves are in good agreement with the numerical ones. The proposed model can reflect the creep-seepage coupling characteristics and the local failure rules of rock under loading-unloading conditions.]]> Fri 27 Apr 2018 13:30:56 AEST ]]>