Browsing by Author "Detournay, Emmanuel"
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Item Hydromechanical behavior of a fluid-saturated crystalline rock(2023-08-21) Asem, Pouyan; Detournay, Emmanuel; Huang, Haiying; Labuz, Joseph; pasem@umn.edu; Asem, PouyanInvestigation of hydromechanical behavior of fluid-saturated crystalline rock is motivated by the need to quantify the effect of changes of fluid pressure p and mean stress P on rock deformation, fluid and mass transport, and their influence on geochemical processes such as the geologic carbon cycle. A suite of laboratory experiments, including a procedure for saturation, is described for measuring three poroelastic parameters – drained bulk modulus K, Biot coefficient , and Skempton coefficient B – governing the volumetric response of Westerly blue granite, a typical crystalline rock of low porosity. These tests are augmented by additional experimental work to measure the unjacketed bulk modulus Ks' and permeability k. For the Terzaghi effective mean pressure of 1.0 < P-"p" < 25.0 MPa, the unjacketed bulk modulus is "K" _"s" ' = 57.5 GPa but other poroelastic coefficients exhibit marked effective mean pressure dependency; the ranges are 13.2 < K < 32.3 GPa, 0.83 > > 0.38, 0.70 > B > 0.07, and 20 > k > 5 nanodarcy.Item Influence functions for "A Poroelastic Model for Laboratory Hydraulic Fracturing of Weak Permeable Rock"(2020-07-03) Gao, Yue; Detournay, EmmanuelItem Line Source in a Poroelastic Layer Bounded by an Elastic Space(2015) Mark, Julien; Savitski, Alexei; Detournay, EmmanuelItem MATLAB codes for "Fast In-Plane Dynamics of a Beam with Unilateral Constraints"(2016-06-02) Liakou, Anna; Detournay, Emmanuel; Denoël, Vincent; aliakou81@gmail.com; Liakou, AnnaA computationally efficient technique to simulate the dynamic response of a beam colliding with rigid obstacles is described in this paper. The proposed method merges three key concepts. First, a low order discretization scheme that maximizes the number of nodes of the discrete model, where impacts are detected, at the expense of the degree of continuity of the constructed displacement field. Second, the constrained problem is transformed into an unconstrained one by formulating the impact by means of a complementarity Signorini's law involving the impulse generated by the collision and the pre- and post- impact velocity linked via a coefficient of restitution. Third, Moreau's midpoint time-stepping scheme developed within the context of colliding rigid bodies, is used to advance the solution.Item Modeling Axisymmetric Cracks in an Elastic Half-Space(2011-06-23) Gordeliy, Elizaveta; Detournay, EmmanuelItem Scratch test results for Alabama marble(2022-07-18) Zhang, He; Le, Jia-Liang; Detournay, Emmanuel; detou001@umn.edu; Detournay, Emmanuel; Dr. Emmanuel DetournayThis dataset contains cutting force signals, videos of rock cutting processes, particle size distribution from sieving analysis obtained from scratch tests conducted on Alabama marble at different depths of cut, which cover the rock failure in ductile, fragmentation and brittle regimes. The force signals and videos can be used to study the rock failure mechanism and energy scaling in the rock cutting process. The particle size distribution data explains the energy dissipation in rock cutting process and the scaling law of the specific energy in the fragmentation regime.Item Scratch test results for Bonne Terre dolomite(2022-07-18) Zhang, He; Le, Jia-Liang; Detournay, Emmanuel; detou001@umn.edu; Detournay, Emmanuel; Dr. Emmanuel DetournayThis dataset contains cutting force signals, videos of rock cutting processes, particle size distribution from sieving analysis obtained from scratch tests conducted on Bonne Terre dolomite at different depths of cut, which cover the rock failure in ductile, fragmentation and brittle regimes. The force signals and videos can be used to study the rock failure mechanism and energy scaling in the rock cutting process.Item Scratch test results for Burlington limestone(2022-07-18) Zhang, He; Le, Jia-Liang; Detournay, Emmanuel; detou001@umn.edu; Detournay, Emmanuel; Dr. Emmanuel DetournayThis dataset contains cutting force signals, videos of rock cutting processes, particle size distribution from sieving analysis obtained from scratch tests conducted on Burlington limestone at different depths of cut, which cover the rock failure in ductile, fragmentation and brittle regimes. The force signals and videos can be used to study the rock failure mechanism and energy scaling in the rock cutting process.Item Scratch test results for Dunnville sandstone(2022-07-18) Zhang, He; Le, Jia-Liang; Detournay, Emmanuel; detou001@umn.edu; Detournay, Emmanuel; Dr. Emmanuel DetournayThis dataset contains cutting force signals, videos of rock cutting processes, particle size distribution from sieving analysis obtained from scratch tests conducted on Dunnville sandstone at different depths of cut, which cover the rock failure in ductile, fragmentation and brittle regimes. The force signals and videos can be used to study the rock failure mechanism and energy scaling in the rock cutting process. The particle size distribution data explains the energy dissipation in rock cutting process and the scaling law of the specific energy in the fragmentation regime.Item Shallow Hydraulic Fracture(2010-02-08) Gordeliy, Elizaveta; Detournay, EmmanuelItem Underground Nuclear Testing in French Polynesia: Stability and Hydrology Issues(International Geomechanical Commission, 1999) Fairhurst, Charles; Brown, Edwin T.; Detournay, Emmanuel; Marsily, Ghislain de; Nikolaevshiy, Victor; Pearson, J.R. Anthony; Townley, Lloyd; Berest, PierreItem Uniaxial compressive strength test and indirect tensile tests for four types of rocks(2022-07-18) Zhang, He; Le, Jia-Liang; Detournay, Emmanuel; detou001@umn.edu; Detournay, Emmanuel; Dr. Emmanuel Detournay