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Mechanical and Mechatronics Engineering: Recent submissions
Now showing items 341-360 of 1512
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Investigating The Exergy Destruction Principle Applied to Precision Agriculture Using Thermal Remote Sensing
(University of Waterloo, 2020-07-24)Nitrogen is one of the most important yield-limiting nutrients for corn (Zea mays). In this research the exergy destruction principle (EDP) is applied as a theory to explain the expected inverse relationship between ... -
Investigation of Liquid-Metal-Embrittlement Crack-path: Role of Grain Boundaries and Responsible Mechanism
(University of Waterloo, 2020-07-24)Liquid metal embrittlement (LME) has been reported in many structural materials, including steel, aluminum, nickel during hot working processes e.g. welding, brazing, heattreatment, leading to abrupt failure. In many of ... -
Investigating the heat-treatment process for 316L alloy powders with the application in binder jetting metal additive manufacturing
(University of Waterloo, 2020-07-23)Metal binder jetting (BJ) is a manufacturing process which involves the deposition of metal powder and an adhesive liquid binder layer-by-layer to fabricate metal parts. BJ as-printed parts are in essence loose particles ... -
Deep Dynamic Stall and Active Aerodynamic Modification on a S833 Airfoil using Pitching Trailing Edge Flap
(SAGE Journals, 2020-08)Due to the dynamic nature of the wind resource, wind turbine blades are subjected to significant variation in flow parameters such as angle of attack. In some cases, the occurrence of dynamic stall on wind turbine blades ... -
Heat Release Rate in Ventilation-Limited Furniture Fires
(University of Waterloo, 2020-07-21)There has always been motivation to investigate and understand fires with hopes of implementing useful changes to fire safety procedures, standards, codes, and education. Due to the unpredictability and destructive nature ... -
Optimization of Neck Musculature Activation for Head Kinematics in Frontal, Lateral and Rear Impact Simulations
(University of Waterloo, 2020-07-21)The activation of the neck musculature plays an important role in the response of the head and neck and can affect the risk of injury under impact conditions. Yet, the role of the level (i.e., magnitude) and timing of the ... -
An Inverse Correlation between Corn Temperature and Nitrogen Stress: A Field Case Study
(2019-10-10)Nitrogen is one of the most important yield-limiting nutrients for corn (Zea mays). The ability of thermal remote sensing to detect nitrogen deficiency in corn may enable precision agriculture to modify nitrogen rates ... -
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 ... -
In-situ observation of nucleation and property evolution in films grown with an atmospheric pressure spatial atomic layer deposition system.
(IOP Science, 2020-06-01)Atmospheric pressure—spatial atomic layer deposition (AP-SALD) is a promising open-air deposition technique for high-throughput manufacturing of nanoscale films, yet the nucleation and property evolution in these films has ... -
Continuum Modelling of Al/CuO Nanothermite Pellet Combustion
(University of Waterloo, 2020-06-15)Nanothermite mixtures are made up of nano-sized metallic fuel and inorganic oxidizer components. As this solid mixture represents a metastable intermolecular composite, an increase in nanothermite temperature can initiate ... -
Effect of Surface Treatment on Joint Performance and Fracture Morphology in Adhesively Bonded Al-Si Coated Ultra-High Strength Steel
(University of Waterloo, 2020-06-04)The Corporate average fuel economy (CAFE) standard set by the National Highway Traffic Safety Administration (NHTSA) has prompted automotive manufacturers to produce increasingly fuel efficient vehicles. Lightweighting of ... -
Characterizing the deformation response of a unidirectional non-crimp fabric for the development of computational draping simulation models
(University of Waterloo, 2020-06-01)In several countries around the world, including Canada, government incentives have been put in place to improve the fuel efficiency of vehicles and reduce CO2 emissions. Improvements in composites manufacturing technology, ... -
Fabrication of 2D materials via novel laser treatment processes and their implementation in optoelectronic applications
(University of Waterloo, 2020-06-01)Pulsed laser treatment of 2D materials is becoming increasingly popular due to the simple and efficient nature of the treatment process. In this thesis, the femtosecond laser treatment methods of 2D materials to fabricate ... -
Resonant Adaptive Mirrors
(University of Waterloo, 2020-05-28)Deformable mirrors (DMs) are integrated into adaptive optical (AO) systems to compensate for wavefront aberrations. These aberrations degrade the image resolution of telescopes, microscopes, ophthalmoscopes, and optical ... -
Effect of Bridge Geometry on Seam Weld Microstructures in AA6xxx Aluminum Porthole Die Extrusions
(University of Waterloo, 2020-05-27)A series of porthole die extrusion trials were conducted with AA6xxx aluminum alloys to understand the influence of die geometry (bridge shape and welding chamber height), extrusion process parameters (ram speed) on the ... -
Capacitive Micromachined Ultrasound Transducers for Non-Destructive Testing Applications
(University of Waterloo, 2020-05-26)The need for using ultrasound non-destructive testing (NDT) to characterize, test and detect flaws within metals, led us to utilize Capacitive Micromachined Ultrasound Transducers (CMUTs) in the ultrasound NDT field. This ... -
Laser Welding of Complex Phase and Dual Phase Advanced High Strength Steels - The Effects that Welding has on Microstructure and Formability
(University of Waterloo, 2020-05-19)To assist in the successful applications of tailor-welded assemblies made from advanced high strength steel (AHSS), there needs to be a thorough understanding of how laser welding process parameters influences the weld ... -
Laser-based aerosolized nanoparticle diagnostics: Enhancing the spectroscopic model
(University of Waterloo, 2020-05-15)The distinct properties of nanoparticles compared to their bulk counterparts makes them a suitable candidate for the development of many emerging technologies, and this presents a demand for scalable production routes. ... -
Fast and Robust Approach to Find the Gouge-free Tool Position of the Toroidal Cutter for the Bézier Surface in Five Axis Machining
(University of Waterloo, 2020-05-15)One of the approach used for tool path generation for Bézier surfaces is the Multipoint machining (MPM) approach, in which the toroidal cutter touches the machined surface at two points of contact. Multipoint machining ... -
Serial Compression Effects on Porosity, Diffusion, Permeability, and Water Droplet Contact Angle of the Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells
(University of Waterloo, 2020-05-14)The polymer electrolyte membrane (PEM) fuel cell is an electrochemical device that directly converts the chemical energy of hydrogen and oxygen into electricity with water and heat as byproducts. It is very promising to ...