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Spring 2018
This thesis explores the effect of fluid substitution, pore-pressure diffusion and stresses due to hydraulic fracturing on the elastic velocities and microcrack orientations in the surrounding rock. I develop a workflow incorporating three main components to model the velocity field around the...
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Fall 2019
With a growing elderly population, osteoporotic pelvic fractures have been an increasingly common worldwide problem. Due to the complexity of the human pelvis, difficulties exist in the diagnosis of subtle fractures and complications may arise from standard treatments. Guidelines for approaching...
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Confined Uniaxial Compaction Observing Triaxial Response of Granular Media under Quasi-static Loading Conditions
DownloadFall 2019
Experimental studies have been carried out in this thesis to enhance the understanding of granular material failure by observing the effects of particle size on material properties. Understanding the granular behaviour of materials is important in pharmaceutical research, product quality in the...
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Data-driven approaches to defining material property and performance relationships of armor ceramics undergoing dynamic loading
DownloadSpring 2023
This thesis utilizes a combined numerical and machine learning approach to explorethe performance of an alumina ceramic tile undergoing high-velocity impact. The fi-nite element model is established by incorporating a user-defined Johnson-Holmquist-Beissel (JHB) material model within the...
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Debris Field Kinetics during the Dynamic Fragmentation of Polyphase Natural Ceramic Blocks: Ejecta Measurements and Damage Modes
Download2013
Hogan, James, Schneider, Markus, Rogers, Robert, Spray, John, Vincent, Gregory
The dynamic fragmentation of coarse and fine grained granitoid blocks during impact has been examined for energies of 1.9 kJ to 3.0 kJ and 2.7 kJ to 6.8 kJ, respectively. A particle tracking algorithm was developed to measure ejecta size and velocity at the rear of the target for a horizontal...
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2020-07-01
Lo, Calvin, Sano, Tomoko, Hogan, James D.
We investigated the uniaxial compressive behavior of damaged and intact alumina using quantitative X-ray computed tomography (XCT) analysis coupled with digital image correlation (DIC) for mechanical characterization. Internal three-dimensional crack characteristics such as crack surface area and...
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2021-03-01
Koch, Brendan M.L., Lo, Calvin, Li, Haoyang, Sano, Tomoko, Ligda, Jonathan, Hogan, James D.
This paper explores the compressive responses of alumina ceramics subjected to various levels of pre-damage via internal cracking. Pre-damage is achieved by subjecting the samples to thermal shock. Mechanical loading is performed using a load frame for quasi-static strain rates and a Kolsky bar...
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Effects of Oxide Additions on the Corrosion Behaviour of Cr2O3 Based Ceramics in High Temperature Supercritical Water Environment
DownloadFall 2012
This investigation is aimed at developing ceramic materials applied in supercritical water, which is being considered as coolant for one of the next generation nuclear reactors. Cr2O3, a primary protective film on stainless steels, was found to be unstable in SCW due to the formation of soluble...
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Spring 2011
An ever increasing demand to exploit oil and natural gas reserves has significantly increased extraction activities even in the remotest regions of the Arctic and sub-Arctic regions of the Canadian North. Steel pipelines are the most efficient mode for transporting and distributing these...
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Impact Failure of Planetary Materials: Lateral Field Ejecta Measurements using Particle Image Velocimetry
Download2014
Schneider, Markus, Spray, John, Rogers, Robert, Hogan, James, Vincent, Gregory
The dynamic fragmentation of a fine grained granitoid material has been examined. Target thicknesses ranged from 7 to 40 mm and impact energies from 12 to 2,500 J. Combined particle image velocimetry and image enhancement techniques are introduced and have been used to measure the size and...