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You searched for +publisher:"University of Toronto" +contributor:("Papini, Marcello"). Showing records 1 – 3 of 3 total matches.

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University of Toronto

1. Jhin, Minseok. Crack Growth Rate and Crack Path in Adhesively Bonded Joints: Comparison of Creep, Fatigue and Fracture.

Degree: 2012, University of Toronto

The relationship between crack path and test method was examined by comparing the performance of adhesive-adherend combinations (six) in quasi-static fracture, mixed-mode fatigue, and creep crack growth. Crack paths in creep and quasi-static fracture were similar due to similar crack-tip plastic zone sizes in the epoxy adhesive even though the crack growth rates in creep were much smaller. Under condensed moisture and mixed-mode, creep and threshold fatigue tests produced interfacial failure. Under room-temperature dry environment, near threshold mixed-mode fatigue was interfacial, but was not in creep or quasi-static fracture. Smaller plastic zone size and crack path proximity to the interface that followed increased the sensitivity of near threshold, mixed-mode fatigue to surface properties. Therefore, the interfacial or cohesive failure of an adhesive system, which may judge the quality of the bond, can be a function of the test being conducted and may not be an absolute indicator of joint quality.

MAST

Advisors/Committee Members: Spelt, Jan K., Papini, Marcello, Mechanical and Industrial Engineering.

Subjects/Keywords: Adhesive Joints; Fracture Mechanics; Crack Path; Plastic Zone; Creep Crack Growth; Fatigue; Quasi-Static Fracture; Test Method; Crack Growth Rate; 0548

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APA (6th Edition):

Jhin, M. (2012). Crack Growth Rate and Crack Path in Adhesively Bonded Joints: Comparison of Creep, Fatigue and Fracture. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/33256

Chicago Manual of Style (16th Edition):

Jhin, Minseok. “Crack Growth Rate and Crack Path in Adhesively Bonded Joints: Comparison of Creep, Fatigue and Fracture.” 2012. Masters Thesis, University of Toronto. Accessed August 22, 2019. http://hdl.handle.net/1807/33256.

MLA Handbook (7th Edition):

Jhin, Minseok. “Crack Growth Rate and Crack Path in Adhesively Bonded Joints: Comparison of Creep, Fatigue and Fracture.” 2012. Web. 22 Aug 2019.

Vancouver:

Jhin M. Crack Growth Rate and Crack Path in Adhesively Bonded Joints: Comparison of Creep, Fatigue and Fracture. [Internet] [Masters thesis]. University of Toronto; 2012. [cited 2019 Aug 22]. Available from: http://hdl.handle.net/1807/33256.

Council of Science Editors:

Jhin M. Crack Growth Rate and Crack Path in Adhesively Bonded Joints: Comparison of Creep, Fatigue and Fracture. [Masters Thesis]. University of Toronto; 2012. Available from: http://hdl.handle.net/1807/33256


University of Toronto

2. van Wijk, Ernst. Jet Oscillation in Abrasive Slurry-Jet Machining as a Function of Polymer Concentration and Nozzle Geometry.

Degree: 2018, University of Toronto

This thesis investigated the effects of polymer concentration and nozzle design on jet stability for polymeric abrasive slurry-jet channel machining in glass. Conical nozzle contractions, having angles of 180°, 60°, 30°, and 20°, were used with aqueous polyethylene oxide (PEO) polymer solutions, having concentrations of 100, 200, and 300 ppm. Channels were machined in glass using slurries containing 1 wt% of 10 μm aluminum oxide particles, made from the same four working fluids used to study jet oscillation. Jet oscillation was found to increase nonlinearly with polymer concentration for all contraction geometries. As a result of the effect of the varying degrees of jet oscillation, a clear relationship was found between the polymer concentration and the channel width. Flow visualization within the nozzle confirmed the presence of vortices that have been associated with jet instability, but did not reveal a clear reason for the changes in jet stability.

M.A.S.

Advisors/Committee Members: Spelt, Jan K, Papini, Marcello, Mechanical and Industrial Engineering.

Subjects/Keywords: Jet Oscillation; Machining; Viscoelasticity; 0548

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APA (6th Edition):

van Wijk, E. (2018). Jet Oscillation in Abrasive Slurry-Jet Machining as a Function of Polymer Concentration and Nozzle Geometry. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/89497

Chicago Manual of Style (16th Edition):

van Wijk, Ernst. “Jet Oscillation in Abrasive Slurry-Jet Machining as a Function of Polymer Concentration and Nozzle Geometry.” 2018. Masters Thesis, University of Toronto. Accessed August 22, 2019. http://hdl.handle.net/1807/89497.

MLA Handbook (7th Edition):

van Wijk, Ernst. “Jet Oscillation in Abrasive Slurry-Jet Machining as a Function of Polymer Concentration and Nozzle Geometry.” 2018. Web. 22 Aug 2019.

Vancouver:

van Wijk E. Jet Oscillation in Abrasive Slurry-Jet Machining as a Function of Polymer Concentration and Nozzle Geometry. [Internet] [Masters thesis]. University of Toronto; 2018. [cited 2019 Aug 22]. Available from: http://hdl.handle.net/1807/89497.

Council of Science Editors:

van Wijk E. Jet Oscillation in Abrasive Slurry-Jet Machining as a Function of Polymer Concentration and Nozzle Geometry. [Masters Thesis]. University of Toronto; 2018. Available from: http://hdl.handle.net/1807/89497

3. Teti, Michael. CFD Modeling and Measurements of Jet Properties and Mixing Chamber Flow in a High-pressure Abrasive Slurry Jet.

Degree: 2018, University of Toronto

Techniques to enhance the performance of a high-pressure abrasive slurry jet micro-machining process (HASJM) were investigated by altering the conditions within the nozzle. The slurry flow rate was controlled using inlet tubes of various diameters, and computational fluid dynamic (CFD) modeling was used to simulate the slurry entrainment process between the high-velocity water from the orifice and low-velocity slurry that occurred within the mixing chamber and mixing tube. The models correctly identified flooding conditions in which there was an increase in the net mass flow rate in the nozzle. Flooding was found to significantly reduce the jet velocity, thus diminishing its erosive efficacy which was assessed by machining blind holes and channels in aluminum 6061-T6. Differences in the centerline erosion rates of holes and channels for a given jet showed clear evidence of incubation and stagnation zone effects.

M.A.S.

Advisors/Committee Members: Spelt, Jan K., Papini, Marcello, Mechanical and Industrial Engineering.

Subjects/Keywords: Abrasive slurry jet; Aluminum 6061-T6; Computational fluid dynamics (CFD); Erosion; Micro-machining; Slurry entrainment; 0548

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Teti, M. (2018). CFD Modeling and Measurements of Jet Properties and Mixing Chamber Flow in a High-pressure Abrasive Slurry Jet. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/89587

Chicago Manual of Style (16th Edition):

Teti, Michael. “CFD Modeling and Measurements of Jet Properties and Mixing Chamber Flow in a High-pressure Abrasive Slurry Jet.” 2018. Masters Thesis, University of Toronto. Accessed August 22, 2019. http://hdl.handle.net/1807/89587.

MLA Handbook (7th Edition):

Teti, Michael. “CFD Modeling and Measurements of Jet Properties and Mixing Chamber Flow in a High-pressure Abrasive Slurry Jet.” 2018. Web. 22 Aug 2019.

Vancouver:

Teti M. CFD Modeling and Measurements of Jet Properties and Mixing Chamber Flow in a High-pressure Abrasive Slurry Jet. [Internet] [Masters thesis]. University of Toronto; 2018. [cited 2019 Aug 22]. Available from: http://hdl.handle.net/1807/89587.

Council of Science Editors:

Teti M. CFD Modeling and Measurements of Jet Properties and Mixing Chamber Flow in a High-pressure Abrasive Slurry Jet. [Masters Thesis]. University of Toronto; 2018. Available from: http://hdl.handle.net/1807/89587

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