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Mechanical and Mechatronics Engineering: Recent submissions
Now showing items 581-600 of 1512
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Process Mapping and Optimal Process Window Identification for Laser Powder Bed Fusion of Invar36
(University of Waterloo, 2018-09-04)The development of Additive Manufacturing (AM) has reached a point where it is positioned to be disruptive for the manufacturing sector, with a majority of manufacturers having leveraged the use of AM in their operations. ... -
Granular Filtration of Airborne NaCl Nanoparticles and Carbon Nanotubes
(University of Waterloo, 2018-09-04)Filtration is one of the primary technologies for nanoparticle control. However, conventional filtration techniques are evaluated mostly for solid mass removal and do not show promising effectiveness for filtration of ... -
Analysis and Design of a Stationary Magnetic Abrasive Finishing System
(University of Waterloo, 2018-08-31)Magnetic Abrasive Finishing (MAF) is a very effective technique used in precision surface finishing and polishing processes. It is defined as one of the advanced and nonconventional finishing processes, which is used to ... -
Recurrent Neural Network Dual Resistance Control of Multiple Memory Shape Memory Alloys
(University of Waterloo, 2018-08-23)Shape memory alloys (SMAs) are materials with extraordinary thermomechanical properties which have caused numerous engineering advances. NiTi SMAs in particular have been studied for decades revealing many useful characteristics ... -
An Intelligent Neural Network Controlled Atmospheric Pressure Spatial Atomic Layer Deposition System for Tunable Metal Oxide Thin Films
(University of Waterloo, 2018-08-22)Atmospheric pressure spatial atomic layer deposition (AP-SALD) is a novel thin film fabrication technique to create conformal and pin-hole free films. The growth rate of AP-SALD is hundreds of times greater than conventional ... -
Dynamic Weight Estimation of Non-Singulated Objects
(University of Waterloo, 2018-08-21)Weight estimation is a common practice throughout many industries, though it typically requires that the objects to be weighed remain motionless. More often than not, it is beneficial to allow objects to move freely through ... -
Investigation of Thorax Response and Potential for Injury in Side Impacts Using Integrated Detailed Human and Vehicle Finite-Element Models
(University of Waterloo, 2018-08-14)Car accidents are amongst the most common causes of fatalities for a younger population in developed countries and world-wide. While research using Anthropometric Test Devices (ATDs) has led to improvements in frontal ... -
Development and Characterization of Graphene-based Microporous Layers for Proton Exchange Membrane Fuel Cells
(University of Waterloo, 2018-08-13)Proton exchange membrane (PEM) fuel cell is an energy-conversion device that converts the chemical energy of hydrogen and oxygen into electricity directly through electrochemical reactions with only water and heat as ... -
Informed Data Selection For Dynamic Multi-Camera Clusters
(University of Waterloo, 2018-08-13)Traditional multi-camera systems require a fixed calibration between cameras to provide the solution at the correct scale, which places many limitations on its performance. This thesis investigates the calibration of dynamic ... -
Evaluation of Mechanical Properties in Pipeline Girth Welds Using Instrumented Indentation
(University of Waterloo, 2018-08-03)This study aims to develop a new method to characterize mechanical properties using instrumented indentation. The indentation results were correlated with observed microstructure in weld metal of gas metal arc welding ... -
Bimodal grain microstructure development during hot compression of a cast-homogenized Mg-Zn-Zr alloy
(Elsevier, 2018-05-02)Hot deformation of a cast-homogenized ZK60 alloy was studied by compression at a temperature of 450 °C and a strain rate of 0.001 s−1 to investigate microstructural evolution. The deformed microstructure was characterized ... -
Process parameters for hot stamping of AA7075 and D-7xxx to achieve high performance aged products
(Elsevier, 2018-07)This work examines the necessary process parameters for die quenching (DQ) during hot stamping and subsequent age hardening and paint bake cycle (PBC) response for two alloys: AA7075 and a developmental 7xxx alloy (referred ... -
Experimental fracture characterisation of an anisotropic magnesium alloy sheet in proportional and non-proportional loading conditions
(Elsevier, 2018-07)A comprehensive experimental investigation was performed to characterize the fracture behaviour of a rare-earth magnesium alloy sheet, ZEK100-O, under both proportional and non-proportional loading conditions. This material ... -
Design, Fabrication and Characterization of MEMS Gyroscopes Based on Frequency Modulation
(University of Waterloo, 2018-07-24)Conventional amplitude modulated (AM) open loop MEMS gyroscopes experience a significant performance trade-off between having a large bandwidth or high sensitivity. It is impossible to improve both metrics at the same time ... -
Strain rate sensitivities of deformation mechanisms in magnesium alloys
(Elsevier, 2018-08-01)Strain rate sensitivity (SRS) is an important material property that governs the rate dependent mechanical behaviors associated with deformation rate changes, creep, stress relaxation, formability, etc. The variety of ... -
Low-Frequency Piezoelectric Energy Harvester with Novel 3D Folded Zigzag Design and High Power Density
(University of Waterloo, 2018-07-09)Cantilevers have been widely used for vibration energy harvesting applications using piezoelectric materials due to their simple geometries, frequency tune-ability, and closed form analytical solution. Recent studies have ... -
Modeling Nanoparticle Generation in a Corona Charger
(University of Waterloo, 2018-07-05)The charging of airborne particles is an important process in both scientific studies and industrial applications. Recently, a new type of apparatus based on aerodynamic particle focusing and the corona charger technique ... -
On the measurement of relative powder-bed compaction density in powder-bed additive manufacturing processes
(Elsevier, 2018-10-05)Experimental studies in the literature have identified the powder-bed compaction density as an important parameter, governing the quality of additively manufactured parts. For example, in laser powder-bed fusion (LPBF), ... -
The mechanism of pore segregation in the sintered nano Ag for high temperature power electronics applications
(Elsevier, 2018-10-01)It is widely accepted that nano pores of sintered nanoparticles can coalesce into micro pores during high temperature service. When applying sintered nanoparticles in power electronics, the pore segregation and delamination ... -
Influence of the chest compression measurement method on assessment of restraint performance in side-impact crash scenarios
(Elsevier, 2018-06-25)Side impact crashes contribute a significant number of fatal injuries (25% of road fatalities in the USA in 2016), with severe thoracic injuries diagnosed in 58% of front near-side impact occupants. Epidemiological data ...