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Mechanical and Mechatronics Engineering: Recent submissions
Now showing items 601-620 of 1512
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Mobile Robot Manipulator System Design for Localization and Mapping in Cluttered Environments
(University of Waterloo, 2018-06-21)In this thesis, a compact mobile robot has been developed to build real-time 3D maps of hazards and cluttered environments inside damaged buildings for rescue tasks using visual Simultaneous Localization And Mapping ... -
Computational Modeling of Hard Tissue Response and Fracture in the Lower Cervical Spine under Compression Including Age Effects
(University of Waterloo, 2018-06-21)Almost half of motor vehicle accident (MVAs) victims experience traumatic spinal cord injuries (SCI), which are often associated with rollover accidents. Specifically, rollovers have the highest incidence rate of AIS2+ ... -
Phenomenological Modeling of Sheet Moulding Compound Composites Under Quasi-Static Three-Point Bending
(University of Waterloo, 2018-06-19)A phenomenological model is implemented to model the behaviour of a glass fiber reinforced sheet moulding composite material. Previous characterization of SMC composites, which included the tensile, compressive, in-plane ... -
Numerical Simulations of Small-scale and Full-scale Fire Experiments
(University of Waterloo, 2018-06-15)A fundamental part of fire safety engineering is dedicated to the application of numerical fire models. Accurate predictions of real-life fires are needed in scenarios related to fire growth, smoke propagation, occupant ... -
Micromechanics Based Model for Long Fibre Polymer Matrix Composite Materials using a Functionally Graded Interphase
(University of Waterloo, 2018-06-11)In order to incorporate more composite materials in mass production vehicles within the automotive industry, compression moulding manufacturing techniques have been de- veloped. Using processes such as Sheet Moulding ... -
Bipolar resistive switching and memristive properties of hydrothermally synthesized TiO2 nanorod array: Effect of growth temperature
(Elsevier, 2018-08-05)In the present work, the hydrothermal approach is employed to develop 1D-TiO2 nanorod array memristive devices and the effect of hydrothermal growth temperature on TiO2 memristive devices is studied. X-ray diffraction (XRD) ... -
A new crystal plasticity framework to simulate the large strain behaviour of aluminum alloys at warm temperatures
(Elsevier, 2018-06-06)To improve metal formability, high temperature forming has become a desired manufacturing process. Phenomenological plasticity models are widely used in this application, however lack good predictive capability concerning ... -
Cracking Behaviour of Glass Fibre-Reinforced Polymers under Combined Compression-Shear Cyclic Loading
(University of Waterloo, 2018-05-28)A ply-level investigation into the cracking behaviour of E-glass/epoxy laminates under cyclic multiaxial loading was performed. Two laminate types were subjected to combined transverse compression-shear loading: multidirectional ... -
Evaluation of High-Speed Videoendoscopy for Bayesian Inference on Reduced Order Vocal Fold Models
(University of Waterloo, 2018-05-18)The ability to use our voice occurs through a complex bio-mechanical process known as phonation. The study of this process is interesting, not only because of the complex physical phenomena involved, but also because of ... -
A graphene-based microporous layer for proton exchange membrane fuel cells: Characterization and performance comparison
(Elsevier, 2018-10-01)Water management is a critical issue for proton exchange membrane (PEM) fuel cells, and the use of a microporous layer (MPL) substantially improves the PEM fuel cell performance, reliability and durability through improved ... -
Superhydrophobic flow channel surface and its impact on PEM fuel cell performance
(Oxford University Press, 2014-09-01)Water management is a critical issue in polymer electrolyte membrane fuel cells (PEMFCs), and it is normally achieved through the modification of surface wettability condition for the cell components. In this study, ... -
Structural Response and Wake Vortex Dynamics of Cylindrical Structures Undergoing VIV with Elliptic Trajectories
(University of Waterloo, 2018-05-17)Vortex Induced Vibrations (VIV) of a pivoted circular cylinder were examined through experiments conducted in a water tunnel facility at the University of Calgary. The structural response and wake dynamics of the system ... -
Mobile Toxics Human Health Risk Assessment Framework
(University of Waterloo, 2018-05-15)Emissions from passenger cars, buses, commercial trucks, and motorcycles operated on highways, streets, and roads are major contributors to air pollution. Research led by the United States Environmental Protection Agency ... -
Dendritic coarsening model for rapid solidification of Ni-superalloy via electrospark deposition
(Elsevier, 2018-08-01)Control of splat thickness in an electrospark deposition (ESD) process can be used to improve the mechanical properties of deposited Inconel 718. The lower cooling rates of thicker deposition splats obtained through higher ... -
Real-time 3D Object Detection for Autonomous Driving
(University of Waterloo, 2018-05-10)This thesis focuses on advancing the state-of-the-art 3D object detection and localization in autonomous driving. An autonomous vehicle requires operating within a very unpredictable and dynamic environment. Hence a robust ... -
Accurate determination of interface trap state parameters by admittance spectroscopy in the presence of a Schottky barrier contact: Application to ZnO-based solar cells
(AIP Publishing, 2013-04-14)This work shows that when a Schottky barrier is present in a photovoltaic device, such as in a device with an ITO/ZnO contact, equivalent circuit analysis must be performed with admittance spectroscopy to accurately determine ... -
Research Update: Doping ZnO and TiO2 for solar cells
(AIP Publishing, 2013-12-01)ZnO and TiO2 are two of the most commonly used n-type metal oxide semiconductors in new generation solar cells due to their abundance, low-cost, and stability. ZnO and TiO2 can be used as active layers, photoanodes, buffer ... -
Nanostructured conformal hybrid solar cells: a promising architecture towards complete charge collection and light absorption
(Springer, 2013-08-22)We introduce hybrid solar cells with an architecture consisting of an electrodeposited ZnO nanorod array (NRA) coated with a conformal thin layer (< 50 nm) of organic polymer-fullerene blend and a quasi-conformal Ag top ... -
The application of localized surface plasmons resonance in Ag nanoparticles assisted Si chemical etching
(AIP Publishing, 2014-01-06)Localized surface plasmons excited by Ag nanoparticles are introduced in the chemical etching process of silicon. A special crateriform structure with gradually varying radius is achieved by the surface electromagnetic ... -
Perspective: Maintaining surface-phase purity is key to efficient open air fabricated cuprous oxide solar cells
(AIP Publishing, 2015-02-01)Electrochemically deposited Cu2O solar cells are receiving growing attention owing to a recent doubling in efficiency. This was enabled by the controlled chemical environment used in depositing doped ZnO layers by atomic ...