https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Experimental and numerical investigation of permeability evolution with damage of sandstone under triaxial compression 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 ]]> Performance study of iterative Bayesian filtering to develop an efficient calibration framework for DEM https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46511 Thu 24 Nov 2022 15:36:29 AEDT ]]> Experimental investigation on the strength, deformability, failure behavior and acoustic emission locations of red sandstone under triaxial compression https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21515 (C′), the switch from compaction-dominated to dilatant-dominated behavior (D′) and the stress at zero volumetric strain all increased linearly with the confining pressure. In our conventional triaxial compression experiments, the failure mode changed from mixed tension and shear fracture (single shear fracture) to shear fracture with double slippage planes with increasing confining pressure. However, the failure mode in our “reducing confining pressure” experiments was more complicated and results mainly from the unstable failure characteristics of the rock during the reduction in confining pressure. Finally, based on our acoustic emission (AE) locations, at a confining pressure of 35 MPa, a detailed analysis of the evolutionary process of internal cracks is presented for the entire loading process.]]> Sat 24 Mar 2018 08:03:37 AEDT ]]> Probabilistic calibration of discrete element simulations using the sequential quasi-Monte Carlo filter Probabilistic calibration of discrete element simulations using the sequential quasi-Monte Carlo filter https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47559 Mon 23 Jan 2023 13:04:24 AEDT ]]> Mechanical properties of artificial structured soils under a conventional drained loading-unloading-reloading stress path https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36007 Fri 24 Jan 2020 12:38:09 AEDT ]]>