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Mechanical and Mechatronics Engineering: Recent submissions
Now showing items 221-240 of 1512
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Influence of feed drives on the structural dynamics of large-scale machine tools
(University of Waterloo, 2021-12-23)Milling is one of the most widely used processes in the manufacturing industry and demands machines with high productivity rates. In large machine tool applications, the cutting capability is mainly limited by the appearance ... -
Effect of Surface State on Radiative Properties of Advanced High Strength Steel Strips
(University of Waterloo, 2021-12-23)Automotive manufacturers increasingly turn to light-weighting through galvanized advanced high strength steels (AHSS) to improve fuel efficiency and reduce pollutant emissions without compromising passenger safety. ... -
Polypyrrole-based Nanofibrous Membrane Separator for Lithium-ion Battery
(University of Waterloo, 2021-12-22)A battery separator is one of the key components of a Lithium-ion battery (LIB). It serves as an insulator between the electrodes to prevent the internal short circuit. More importantly, the battery separator retains liquid ... -
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 ... -
Towards Feedback Controlled Droplet Microfluidic Platforms
(University of Waterloo, 2021-12-21)Microfluidics, the manipulation of nanoliter to microliter volumes of fluids, can give important new capabilities to researchers in biology, chemistry, material science, and medicine. Broadly, current methods can be ... -
Cuffless Blood Pressure Monitoring: Estimation of the Waveform and its Prediction Interval
(University of Waterloo, 2021-12-21)Cuffless blood pressure (BP) estimation devices are receiving considerable attention as tools for improving the management of hypertension, a condition that affects 1.13 billion people worldwide. It is an approach that can ... -
Magnetic Field Assisted Abrasive Polishing
(University of Waterloo, 2021-12-20)Surface roughness of both machined and additively manufactured components is a critical characteristic that ensures both functional requirements and efficient performance in many high-precision applications requiring precise ... -
Dissimilar laser welding of NiTi shape memory alloys
(University of Waterloo, 2021-12-20)Welding of NiTi shape memory alloys has a great importance since it has a wide application in the medical industry due to the NiTi unique biocompatibility, superelasticity and shape memory effect. Laser microwelding is one ... -
Quantifying Upper-Limb Bimanual Coordination Performance Using Machine Learning Techniques for Concussion Screening
(University of Waterloo, 2021-12-16)Current concussion screening and diagnosis tools rely on symptom checklist scores, along with subjective assessments performed by a clinician. This introduces high variability and bias, and increases the chances of missed ... -
Modeling, performance evaluation, and post-process planning for directed energy deposition
(University of Waterloo, 2021-12-15)This dissertation focuses on improving part quality and process reliability by proposing methods for predicting process outcomes, detecting defects and process anomalies in DED. These methods include physics-based process ... -
Stochastic Reconstruction and Morphological Studies of Catalyst Layers of Proton Exchange Membrane Fuel Cells
(University of Waterloo, 2021-11-26)Durability is one of the main obstacles that inhibits the commercialization of polymer electrolyte membrane (PEM) fuel cells for transport applications, in which the microstructure of catalyst layers (CL) under dynamic ... -
Nanoparticle Focussing Using Aerodynamic Lenses and a Divergent Nozzle
(University of Waterloo, 2021-11-23)Since the COVID-19 pandemic has been a global crisis that has posed enormous and diverse challenges to humanity, it has revealed the urgent need for further study into a variety of properties of viruses, including virus ... -
Experimental Evaluation of Affordance Detection Applied to 6-DoF Pose Estimation for Intelligent Robotic Grasping of Household Objects
(University of Waterloo, 2021-11-22)Recent computer vision research has demonstrated that deep convolutional neural networks can be trained on real images to add context to object parts for simultaneous object detection and affordance segmentation. However, ... -
An exploration of isolated vortex collisions
(University of Waterloo, 2021-10-27)Vortices are ubiquitous in fluid dynamics, and their interactions are critical in various natural and engineering phenomena, such as the turbulence cascade and unsteady fluid loading on structures. This thesis focuses on ... -
Effect of polymer additives on transitioning and turbulent boundary layers
(University of Waterloo, 2021-10-26)Injection of small quantities of polymer solutions in various internal and external turbulent flows can produce a substantial reduction of skin friction drag. This phenomenon, known as Toms phenomenon, has been actively ... -
Augmentation of Visual Odometry using Radar
(University of Waterloo, 2021-10-25)As UAVs become viable for more applications, pose estimation continues to be critical. All UAVs need to know where they are at all times, in order to avoid disaster. However, in the event that UAVs are deployed in an area ... -
Fingerprint-based indoor positioning and intensity classification using an improved machine learning framework
(University of Waterloo, 2021-10-21)Covid-19 has changed the world in terms of business, public, and many other fields. Millions of livelihoods have been affected by the pandemic. Amidst the upheaval, work from home and restrictions on indoor gatherings have ... -
Constitutive Behaviour and Formability of Pre-aged AA7075 Sheet in a Warm Forming Process
(University of Waterloo, 2021-10-19)Warm constitutive and formability characterization of a high strength aluminum alloy (AA7075) was performed for a range of pre-aged (i.e. under-aged) tempers, strain rates and temperatures. The pre-aging processes were ... -
Powder-fed Laser Directed Energy Deposition of Near-β Titanium Alloy: A Comprehensive Analytical and Experimental Analysis
(University of Waterloo, 2021-10-12)Laser directed energy deposition through powder feeding (LDED-PF), a class of metal additive manufacturing (AM), is a promising technique that enables the repair and refurbishment of metallic components with a variety of ... -
Characterisation and modeling of precipitation kinetics and yield strength in variously treated 7000-series aluminum alloys
(University of Waterloo, 2021-10-01)This thesis investigates the effects of: (a) various aging practices, and (b) deformation during a warm-forming cycle, on the precipitation hardening response and aging kinetics of AA7050 and AA7075, respectively. The ...