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- 131Mechanical Engineering, Department of/Journal Articles (Mechanical Engineering)
- 1Earth and Atmospheric Sciences, Department of
- 1Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
- 1Physics, Department of
- 1Physics, Department of/Journal Articles (Physics)
- 30Carey, Jason P.
- 17Major, Paul W.
- 15Hogan, James
- 13Melenka, Garrett W.
- 10Secanell, Marc
- 9Nobes, David S.
- 8Dynamic fragmentation
- 6Planetary materials
- 5Brittle fracture
- 5Deformation
- 5Porous media plumes
- 4Brittle failure
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Gearbox Fault Feature Extraction Using Hilbert Transform, S-Transform, and a Statistical Indicator
Download2007
Vibration analysis has been widely used in machine fault feature extraction and diagnosis of rotating machinery. The effects of modulation and nonstationarity in vibration signals collected from a faulty gearbox present challenges for fault feature extraction. Hilbert transform and S-transform...
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2015
e report upon a laboratory experimental study of dense full- and partial-depth locks released gravity currents propagating through a two-layer ambient and over sinusoidal topography of amplitude A and wavelength λ. Attention is restricted to a Boussinesq flow regime and the initial (or slumping)...
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Gravity currents in a two-layer stratified ambient: the theory for the steady-state (front condition) and lock-released flows, and experimental confirmations.
Download2012
Tan, A.W. , Ungarish, M., Flynn, M.R.
We consider the propagation of a gravity current of density ρ c at the bottom of a two-layer stratified ambient in a horizontal channel of height H, in the high-Reynolds number Boussinesq domain. The study emphasizes theoretical-analytical modeling, however, experimental and Navier-Stokes...
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Gravity currents propagating up a slope in a two-layer fluid
2004
Sutherland, B.R, Marleau, L. J., Flynn, M.R.
Gravity currents produced by partial-depth lock-release and travelling along the base of a two-layer stratified ambient are investigated as they propagate along a rising slope. The initial gravity current front speed is found to be consistent with a theory adapted from Shin et al. [“Gravity...
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2014
Marleau, L. J., Sutherland B.R., Flynn, M.R.
Bottom propagating gravity currents resulting from full- and partial-depth lock-release experiments are investigated as they approach and then propagate up a rising slope. Consistent with the prediction of a WKB-like theory, the gravity current front decelerates in a nearly uniform manner along...
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Hybrid Finite-Discrete Element Modeling of the Mode I Tensile Response of an Alumina Ceramic
Download2023-03-13
Zheng, Jie, Li, Haoyang, Hogan, James D.
We have developed a three-dimensional hybrid finite-discrete element model to investigate the mode I tensile opening failure of alumina ceramic. This model implicitly considers the flaw system in the material and explicitly shows the macroscopic failure patterns. A single main crack perpendicular...
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2017-01-01
Pirani, Mohammad, Hashemi, Ehsan, Fidan, Baris, Simpson-Porco, John W.
This paper investigates the robustness of two well-known applications of second-order consensus dynamics, namely mechanical and power networks. For uniform subsystem parameters, we derive expressions for the H∞ norms of mechanical and power networks, from external disturbances to body...
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Impact Deposition Behavior of Al/B4C Cold-Sprayed Composite Coatings: Understanding the Role of Porosity on Particle Retention
Download2023-03-22
Farid, Hannaneh Manafi, McDonald, André, Hogan, James David
This study explores the role of porosity in the impact deposition of a ceramic-reinforced metal-matrix (i.e., Al/B4 C) composite coating fabricated via cold spraying. The Johnson–Holmquist–Beissel constitutive law and the modified Gurson–Tvergaard–Needleman model were used to describe the high...
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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...
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2015-01-01
Singh, Shikhar, Kumar, Amit, Jain, Siddharth
The production of biofuels (e.g., ethanol and biodiesel) requires a significant amount of water during feedstock production, transportation, and its conversion into biofuels. Therefore present study devoted to study the impact of biofuel production on water demand in Alberta. In scenario #1, it...