Browsing Theses by Title
Now showing items 1755-1774 of 15758
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Characterization and microstructure-based modeling of spot weld failure in hot stamped steel
(University of Waterloo, 2022-02-08)The performance of automotive safety components in a crash event depends on the mechanical properties of the sheet metal as well as the failure behavior of the spot welds that are used for sheet metal assembly. Unlike many ... -
Characterization and Modeling of Forged ZK60 Mg Alloys under Quasi-static and Fatigue Loadings
(University of Waterloo, 2020-01-24)In response to impending changes to the environmental regulations on the vehicles’ gas consumption rate, the transportation sector is motivated toward the widespread adoption of lightweight materials in the manufacturing ... -
Characterization and Modeling of Selected Antiandrogens and Pharmaceuticals in Highly Impacted Reaches of Grand River Watershed in Southern Ontario
(University of Waterloo, 2013-10-01)Endocrine disruption and high occurrences of intersex have been observed in wild fish associated with wastewater treatment plant (WWTP) effluents in the urbanized reaches of the Grand River watershed located in southern ... -
Characterization and Modeling of Sheared Edge Failure in Advanced High Strength Steel
(University of Waterloo, 2018-03-07)Edge failure is one of the major problems associated with forming of advanced high strength steels (AHSS) such as dual-phase (DP) steels. The development of ferritic-bainitic steels such as complex-phase (CP) steels have ... -
Characterization and Modeling of Smooth and Notched Rolled ZEK100-O under Cyclic Load
(University of Waterloo, 2018-10-26)As an effective way to reduce greenhouse gas emissions, goals on weight reduction has been fully focused by automotive manufacturers to meet the environmental regulations. Magnesium (Mg) alloys, with its high specific ... -
Characterization and Modelling of 3rd Generation Advanced High Strength Steel Automotive B-pillars from Forming to Crash
(University of Waterloo, 2022-09-26)This thesis investigates the application of 3rd Generation Advanced High-Strength Steels (3rd Gen AHSS) with ultimate tensile strengths of 980 and 1180 MPa to the forming and crash performance of an automotive B-pillar. ... -
Characterization and Modelling of Additively Manufactured Hastelloy X Parts under Quasi-Static and Cyclic Loading
(University of Waterloo, 2021-04-28)Laser powder-bed fusion (LPBF) is one of the main additive manufacturing (AM) methods, which has been proven to produce complex metallic parts with fine features. Understanding the correlation of process parameters to the ... -
Characterization and modelling of quasi-static and fatigue notch effect in AZ31B-H24 rolled sheet
(University of Waterloo, 2018-10-25)The transportation sector releases large amounts of harmful greenhouse gases into Earth’s atmosphere. Vehicle weight reduction through the use of magnesium alloys is an effective way to reduce carbon dioxide emission and ... -
Characterization and Performance Analysis of UHF RFID Tag for Environmental Sensing Applications
(University of Waterloo, 2012-06-21)Passive radio frequency identification (RFID) tag has been shown efficient in item tracking and management in the supply chain. Attracted to low weight and small size of wireless nodes, some research work was conducted to ... -
Characterization and Simulation of the Microstructure of Additively Manufactured Hastelloy X Parts with Columnar Grain Structure
(University of Waterloo, 2021-05-21)One of the well-known AM techniques is laser powder-bed fusion (LPBF), which enables engineers to benefit from the concept of “design freedom” while designing complex geometries compared to other conventional methods. This ... -
Characterization and Simulation of Warm Forming of 6xxx and 7xxx Series Aluminum Alloys
(University of Waterloo, 2017-09-12)This thesis investigates warm forming of 6000 and 7000 series aluminum alloys, namely AA6013 T6, AA7075 T6 and a developmental 7000 series alloy (designated AA70XX T76), including characterization and validation of the ... -
Characterization and Size Optimization of Additively Manufactured Flexible Piezoresistive Sensors for Vibration Strain Sensing
(University of Waterloo, 2021-12-21)Flexible piezoresistive strain sensors have promising applications in areas such as wearables and soft robotics. For sensing dynamic strains, such as a runner’s gait or a slipping object held by a robotic gripper, these ... -
Characterization and Theoretical Study of Mid-infrared Quantum Cascade Lasers
(University of Waterloo, 2019-05-07)The technology and performance of quantum cascade lasers has rapidly developed since it was firstly unveiled in 1994. This type of laser has a feasible design, micro meter size and potential for emission of long wavelength ... -
Characterization and Through Process Modelling of Large Strain Phenomena for Aluminum Alloys at Room and Elevated Temperatures
(University of Waterloo, 2017-02-16)The objective of this research is to model and analyze large strain problems (rolling, hot compression) in FCC polycrystals. In the first part of this research, a rate-dependent crystal plasticity based Element Free Galerkin ... -
Characterization and Tracking of Contaminants in Oil Tar Sediments and Assessment of Water Treatment Technologies for Their Removal
(University of Waterloo, 2011-04-25)Between 1920 and 1950 an oil gasification plant operated on a property adjacent to Kettle Creek about 0.2 km from the mouth of Port Stanley harbour on Lake Erie, Ontario, Canada. Oil tar wastes from the gasification plant ... -
Characterization of a Live Fire Training Simulator for use in the Canadian Fire Service
(University of Waterloo, 2020-06-17)This thesis reports on the design, instrumentation, testing, and characterization of a live fire training simulator for use in the Canadian Fire Service. The importance of fire training, including live fire training ... -
Characterization of a novel truncated isoform of murine AGPAT4 arising from predicted splice variants
(University of Waterloo, 2021-06-02)The acylglycerophosphate acyltransferase (AGPAT)/lysophosphatidic acid acyltransferase (LPAAT) family of enzymes is responsible for the conversion of lysophosphatidic acid (LPA) to phosphatidic acid (PA), a precursor of ... -
Characterization of a novel weak cation-exchange hydrogel membrane through the separation of lysozyme from egg white
(University of Waterloo, 2012-09-07)Membrane chromatography was investigated as an alternative method to packed-bed chromatography for protein recovery. The purification of lysozyme from egg white with Natrix adseptTM weak cation-exchange membranes was ... -
Characterization of acid phase anaerobic digestion of municipal sludges to improve biological nutrient removal processes
(University of Waterloo, 2017-10-24)Enhanced biological phosphorus removal (EBPR) can improve the balance sheet for waste water treatment plants. However, for phosphate accumulating organisms (PAOs) to work efficiently, there needs to be a readily biodegradable ... -
Characterization of Active Cellulolytic Consortia from Arctic Tundra
(University of Waterloo, 2011-05-20)The consortia of microorganisms responsible for the hydrolysis of cellulose in situ are at present poorly characterized. Nonetheless, the importance of these communities is underscored by their capacity for converting ...