Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"surface failure"”.
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Multi Scale Contact Mechanics of Bio-Mechanical Systems with inclusion of roughness effect- Fractal Analysis
Contact mechanics of rough surfaces and surface wear will be considered. Two types of failures are considered. The first involving rapidly growing failure and the second fatigue type surface failure as a result of repetitive application of load cycle. The first type of failure will be identified …
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Reconfigurable autopilot design for a high performance aircraft using model predictive control
… of military and civilian aircraft due to control surface failures have prompted research into controllers with a degree of reconfiguration. This thesis will describe a design approach incorporating Model Predictive Control (MPC) with a self updating model to achieve a level of reconfiguration in a …
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EXC-5 Controls Intracellular Trafficking in Order to Maintain the Apical Structure of the C. elegans Excretory Canal
… where the sorting of material to the apical surface is only required at certain points along the canal where it is undergoing significant restructuring because of growth or physical damage. When exc-5 is mutant, materials are not efficiently sorted to the apical surface where they are needed …
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Skin friction drag reduction in turbulent flows using superhydrophobic surfaces
The use of randomly textured superhydrophobic surfaces have recently gained interest as a potential approach for the passive reduction of skinfriction on the hull of ships, submarines and underwater projectiles. When submerged in water, these surfaces trap a layer of air (or 'plastron') within …
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Mass transfer, creep and stress development during the drying of red oak
… to cut very thin wafers of wood parallel to the surface, the elastic strain was shown to be quite small. The experiments led to the conclusion that the maximum stress develops within a few cell thicknesses of the surface. Much of the experimental work centered on the t of the rheological or creep …
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Centrifuge modelling of railway embankments under static and cyclic loading
… currently used on the coal export line, the failure of these embankments can be modelled in a centrifuge to better understand the mechanism of failure. The main objective of the study was to investigate the influence of static and cyclic loading on railway embankments by testing models in the …
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Transient Analysis of Isothermal Elastohydrodynamic Point Contacts
… films, formed between contacting surfaces in order to improve working performance and to prevent surface failure by wear or fatigue. As applied load, speed and the conjunction geometry vary with time under realistic operating conditions, the generated lubricant films exhibit a …
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Wear mechanisms of chemically crosslinked hydrogels under mild abrasion
… a study of their robust long-term use and surface failure mechanism is necessary. In this dissertation, we evaluate different aspects of the wear behavior of hydrogels to develop tools for predicting their wear resistance as well as to improve future hydrogel surface design to withstand the …
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An Experimental Evaluation of Micro-pitting Performance of Two Bearing Steels
… run-in process is implemented for the purpose of surface roughness break-in. By counting the distributed micro-pitted areas on the surface, a Micro-pitting Severity Index (MSI), defined as the ratio of the total micro-pitted area to the entire inspection area, is quantified for every test …