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Spring 2014
This work provides a guideline for gecko inspired dry adhesive design and simulation. Mechanical property testing for several polymers commonly used in gecko adhesives (Kraton G1657 thermoplastic elastomer, ST-1060, and ST-1087 polyurethane elastomers) allowed hyperelastic and viscoelastic...
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High-Float Emulsion Residue: A New Rheological Model Based on the Existence of a Yield Stress
DownloadFall 2016
“High-float” (HF) emulsions are dispersions of micron-sized bitumen droplets in water, with a special type of anionic surfactant functioning as stabilizer. By allowing the water to evaporate from an HF emulsion, what remains is called a “high-float emulsion residue.” Although indistinguishable in...
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Investigation of Failure Modes of Fiber Reinforced Polymer Composite Flywheel Rotors for Energy Storage Systems
DownloadFall 2022
High-velocity and long-lifetime operating conditions of modern high-speed energy storage flywheel rotors may create the necessary conditions for failure modes not included in current quasi-static failure analyses. The central hypothesis for this thesis research is that (i) viscoelastic effects...
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Modeling the Viscoelastic Material Behavior of the Midpalatal Suture in Finite Element Simulations for the Purpose of Better Understanding the Role of Soft Tissue Sutures in Orthodontic Maxillary Expansion Procedures
DownloadFall 2016
Finite element analysis can help increase understanding of how the material behavior of the midpalatal suture affects maxillary expansion in adolescents with unfused sutures. Mathematical material models describing the non linear viscoelastic behavior of the midpalatal suture were previously...
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Ultrasonic Characterization of Bitumen with Pressure and Temperature: Implications for seismic monitoring of the Grosmont Formation
DownloadFall 2018
The vastly untapped carbonate Grosmont Formation in north-eastern Alberta may hold in excess of a couple of hundred billion barrels initial volume of bitumen in place. Bitumen, an ultra-heavy hydrocarbon oil, possesses a density comparable to water, but a dynamic shear viscosity million times...
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Spring 2010
The focus of this thesis is on electro-osmotically pumped flow of viscoelastic fluids through microchannels. Fluid transport in microscaled structures is typically laminar due to the low Reynolds numbers involved. However, it is known that viscoelastic polymeric liquids can display striking...