Theses and Dissertations
Diffusion Couple Alloying of Refractory Metals in Austenitic and Ferritic/Martensitic Steels
(Monterey, California. Naval Postgraduate School, 2012-03)
This thesis utilized the diffusion couple approach to evaluate the addition of molybdenum, niobium, tantalum, and tungsten to 316 stainless (316SS) and alloy HT9 steels. Refractory elements have been previously studied as ...
Evaluation of Friction Stir Processing of HY-80 Steel Under Wet and Dry Conditions
(Monterey, California. Naval Postgraduate School, 2012-03)
This thesis describes the microstructural and mechanical property changes associated with Friction Stir Processing
(FSP) of HY-80 steel under dry and underwater conditions. HY-80 is a low-carbon alloy steel that is used ...
Development and Analysis of a Bi-Directional Tidal Turbine
(Monterey, California. Naval Postgraduate School, 2012-03)
The concept of using renewable energy for power generation has experienced much attention with increasing costs of non-renewable sources. The largest untapped renewable energy resource is in the form of the oceans and ...
Carbon Fiber and Tungsten Disulfide Nanoscale Architectures for Armor Applications
(Monterey, California. Naval Postgraduate School, 2012-06)
The objective of this research was to generate shock-resistant materials based on inorganic fullerene type tungsten disulfide (IF-WS2) and carbon nanocomposite structures for personal protection armor systems. The aim was ...
Development of a MEMS-Scale Turbomachinery Based Vacuum Pump
(Monterey, California. Naval Postgraduate School, 2012-06)
This study forms part of a larger study to develop a MEMS scale turbomachinery based vacuum pump. This would allow very high vacuum to be drawn for handheld mass spectroscopy. This thesis concentrates on the roughing portion ...
Global Versus Reactive Navigation for Joint UAV-UGV Missions in a Cluttered Environment
(Monterey, California. Naval Postgraduate School, 2012-06)
This thesis presents the coordination of an unmanned, multi-vehicle team that navigates through a congested environment. A novel approach is outlined that enables the control of multiple vehicles based on both computer ...
Numerical Study for Optimum Parameters of Bonded Composite Repairs of Cracked Aluminum
(Monterey, California. Naval Postgraduate School, 2012-06)
This thesis used Finite Element Analysis to model a cracked aluminum panel repaired with a bonded composite patch using the minimization of energy release rate in mode I crack growth conditions to determine effectiveness ...
The Effect of Sensitization on the Stress Corrosion Cracking of Aluminum Alloy 5456
(Monterey, California. Naval Postgraduate School, 2012-06)
This work examines the effect of sensitization on the stress corrosion cracking behavior of marine grade aluminum alloys (Al-Mg). These alloys can be sensitized during operation, promoting their susceptibility to intergranular ...
Fabrication and Optimization of Carbon Nanomaterial-Based Lithium-Ion Battery Anodes
(Monterey, California. Naval Postgraduate School, 2012-03)
Lithium-ion batteries possess high energy and power densities, making them ideal candidates for energy storage requirements in various military applications. Commercially produced lithium-ion battery anodes are commonly ...
The Aerodynamics of a Maneuvering UCAV 1303 Aircraft Model and its Control through Leading Edge Curvature Change
(Monterey, California. Naval Postgraduate School, 2012-09)
This study investigates the aerodynamic effects of modifying the leading edge on an unmanned combat air vehicle (UCAV) 1303. Literature suggests that leading edge accelerations are reduced for rounder leading edges and ...
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Mechanical Engineering (32)