Browsing Mechanical and Mechatronics Engineering by Type "Doctoral Thesis"
Now showing items 41-60 of 424
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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 ... -
Characterizing and Modeling the Effects of Mode Mixity and Bond Line Thickness on the Traction-Separation Response of Structural Adhesive Joints
(University of Waterloo, 2021-04-28)As adhesive bonding continues to become more prevalent in automotive structures, the need for high fidelity characterization and modelling of adhesive joints has gained in importance. In this thesis, new specimen geometry ... -
Characterizing and Modelling the Strain Rate-Dependent Constitutive Response of a Unidirectional Non-Crimp Fabric Composite Material
(University of Waterloo, 2023-09-19)Liquid molded composite materials comprising heavy-tow non-crimp fabric reinforcements are increasingly being used for primary load-bearing structures in the automotive sector due to their excellent specific mechanical ... -
Chip geometry, cutting force, and elastic deformation prediction for gear hobbing
(University of Waterloo, 2023-08-08)The machining industry is constantly challenged through increasing demands for productivity and stringent part quality requirements such as dimensional accuracy and surface quality. Physics-based models are becoming more ... -
The cold wire gas metal arc welding (CW-GMAW) process: Description and Applications
(University of Waterloo, 2020-09-11)The demand for new and reliable welding processes comes from the need to improve productivity and quality in welding of new materials used in infrastructure projects. Among the areas where this development is crucial, is ... -
Comprehensive Analytical Modeling of Laser Powder-Bed/Fed Additive Manufacturing Processes and an Associated Magnetic Focusing Module
(University of Waterloo, 2019-05-21)State-of-the-art metal additive manufacturing (AM), mainly laser powder-fed AM (LPF-AM) and laser powder-bed AM (LPB-AM), has been used to produce high-quality, complex-shaped, and end-user metallic parts. To achieve ... -
A Comprehensive Model for Filtration and Adsorption of Intermediate Nanoparticles
(University of Waterloo, 2020-09-22)Nanoparticles have been extensively studied in environmental research because of their great impact on human health and the environment. Airborne particles are recognized as the second largest risk factor for non-communicable ... -
Comprehensive, Consistent and Systematic Approach to the Mathematical Modeling of PEM Fuel Cells
(University of Waterloo, 2006-12-12)Polymer electrolyte membrane (PEM) fuel cells are a promising zero-emission power source for transportation applications. An important tool for advancing PEM fuel cell technology is mathematical modeling. Mathematical ... -
Computational Acoustic Beamforming for Noise Source Identification for Small Horizontal Axis Wind Turbines
(University of Waterloo, 2017-02-21)This thesis develops a computational acoustic beamforming (CAB) method for identification of sources of small wind turbine noise. The methodology consists of three components: computational fluid dynamic (CFD), acoustic ... -
Computational Modeling of the Cervical Spinal Cord: Integration into a Human Body Model to Investigate Response to Impact
(University of Waterloo, 2022-08-19)Acute spinal cord injuries (SCI) have a global annual occurrence rate of 14 to 40 per million population with considerable societal cost. The primary mechanism of injury involves physical damage to the nervous tissues, ... -
Computer Aided Engineering in the Foot Orthosis Development Process
(University of Waterloo, 2013-08-30)An orthosis, or orthotic device is used to straighten or correct the posture of part of the body. A foot orthosis (FO) is the subject of study for this dissertation. A FO is situated between the foot and the midsole of the ... -
Conditional Moment Closure Methods for Turbulent Combustion Modelling
(University of Waterloo, 2013-03-28)This thesis describes the application of the first-order Conditional Moment Closure (CMC) to the autoignition of high-pressure fuel jets, and to piloted and lifted turbulent jet flames using classical and advanced CMC ... -
Constitutive and Fracture Characterization and Modelling of Monolithic and Tailor-Welded Blanks of Press-Hardening Steels
(University of Waterloo, 2021-04-21)This study investigates the constitutive (flow) and fracture response of two automotive-grade press-hardening steels, Usibor® 1500-AS and Ductibor® 500-AS, as well as their tailor-welded blanks (TWBs), for a range of ... -
Constitutive and Fracture Characterization of an Anisotropic and Asymmetric Alloy Sheet
(University of Waterloo, 2018-02-14)Magnesium alloys can offer significant weight reduction over conventional steel or aluminum alloys. Specifically, rare-earth alloyed magnesium sheets have the potential to be used as light-weight structural alloys since ... -
Constitutive and Fracture Characterization of High Strength Aluminum Alloys at Low and Elevated Strain Rates
(University of Waterloo, 2022-05-27)The present research investigates the constitutive and fracture behavior of three high strength automotive aluminum sheet alloys, AA6013-T6, AA7075-T6, and AA7xxx-T6 under quasi-static and elevated strain rate conditions. ... -
Constitutive Modelling of Creep in a Long Fiber Random Glass Mat Thermoplastic Composite
(University of Waterloo, 2009-01-16)Random Glass Mat Thermoplastic (GMT) composites are increasingly being used by the automotive industry for manufacturing semi-structural components. The polypropylene based materials are characterized by superior strength, ... -
Continuum Modelling and Vibration Analysis of String-Harnessed Structures
(University of Waterloo, 2017-09-14)Power and signal cables in recent years have been observed to constitute a major component in the dynamic behaviour of space structures. In a typical system, the cables-to-payload mass ratio can be as high as 20%. Ignoring ... -
Control Methods for Improving Tracking Accuracy and Disturbance Rejection in Ball Screw Feed Drives
(University of Waterloo, 2014-01-23)This thesis studies in detail the dynamics of ball screw feed drives and expands understanding of the factors that impose limitations on their performance. This knowledge is then used for developing control strategies that ... -
Controlled mechano-chemical synthesis and properties of nanostructured hydrides in the Mg-Al-H and Mg-B-H systems
(University of Waterloo, 2007-04-02)The present work reports a study of mechano-chemical synthesis (MCS) and mechano-chemical activation synthesis (MCAS) of nanostructured hydrides in the Mg-H, Mg-Al-H and Mg-B-H systems by controlled reactive mechanical ... -
Cooperative Manipulation using a Magnetically Navigated Microrobot and a Micromanipulator
(University of Waterloo, 2017-12-13)The cooperative manipulation of a common object using two or more manipulators is a popular research field in both industry and institutions. Different types of manipulators are used in cooperative manipulation for carrying ...