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An integrated approach for characterization of properties and mesostructure for FDM Ultem 9085
(University of Missouri--Columbia, 2010)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The Fused Deposition Modeling (FDM) process is a layered prototyping technique used to build prototypes out of thermoplastic materials. It is currently ...
Effect of chip thickness, sub-critical bifurcations and process parameters in high-speed milling
(University of Missouri--Columbia, 2010)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The main focus of the current research is to experimentally and numerically investigate of subcritical bifurcations in milling accounting for actual ...
Mean grain size estimation for copper-alloy samples based on attenuation coefficient estimates
(University of Missouri--Columbia, 2011)
A polycrystalline metal's grain size affects its mechanical properties; therefore, the ability to effectively and easily monitor grain size during a manufacturing process is critical. Conventional destructive tests utilized ...
Thermal-mechanical analysis of a low-enriched uranium foil based annular target for the production of molybdenum-99
(University of Missouri--Columbia, 2011)
One of the US department of Energy's global threat reduction initiative goals is to eliminate the use of high-enriched uranium from the production of the radio-isotope Molybdenum-99. One strategy to achieve this goal is ...
Design and simulation analysis of MEMS parallel plate capacitor models for voltage conversion and power harvesting
(University of Missouri--Columbia, 2011)
In environment, unwanted and undamped vibrations are abundantly available which can be converted into electrical energy and used for energy harvesting. This paper contains the design, modeling and simulation results of ...
Design and optimization of a Mars sample return mission with nuclear thermal rockets
(University of Missouri--Columbia, 2011)
Nuclear thermal propulsion (NTP) is recognized as the only solution to human exploration of the near planets during the next several decades, but NTP currently receives little funding for development. In order to foster ...
Flapping wing dynamics of MAVs : nonlinear modeling and experimental investigation
(University of Missouri--Columbia, 2011)
Analysis of the flapping-wing motion of micro air vehicles (MAVs) is a complex problem that involves nonlinear structural analysis coupled with unsteady fluid mechanics analysis. In this study I apply a fully nonlinear ...
Dual phase lag behavior of living biological tissues in laser hyperthermia
(University of Missouri--Columbia, 2011)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] A Generalized dual phase lag behavior for living biological tissues are investigated for blood and tissues and also developed a generalized dual phase ...
Electron emission thermal energy conversion
(University of Missouri--Columbia, 2010)
Electron emission from a surface can be achieved via two mechanisms: tunneling and thermionics. Converting thermal energy to electrical power using these mechanisms is achieved by generation of an electron current from the ...
An axisymmetric interfacial tracking model for melting-vaporization-resolidification in a thin metal film irradiated by pico to femtosecond pulse lasers
(University of Missouri--Columbia, 2010)
A two dimensional axisymmetric, interfacial tracking method is developed to model rapid melting and solidification of a free standing metal film subjected to an ultra-short laser pulse. Finite volume method is employed to ...
Effects of machining system parameters and dynamics on quality of high-speed milling
(University of Missouri--Columbia, 2013)
This dissertation outlines research on studying the effects of machining parameters such that cutting speed, feed rate, axial depth of cut, radial depth of cut and helix angle on system dynamic stability and the surface ...
The thermal-mechanical analysis of targets for the high volume production of molybdenum-99 using a low-enriched uranium metal foil
(University of Missouri--Columbia, 2012)
Molybdenum-99 diagnostic imaging is the most commonly practiced procedure in nuclear medicine today with the majority molybdenum-99 produced with proliferation sensitive HEU. International and domestic efforts to develop ...
Evaluation of novel hovering strategies to improve gravity-tractor deflection merits
(University of Missouri--Columbia, 2011)
The gravity-tractor (GT) consists of a spacecraft hovering inertially over a small asteroid. This equilibrium state is achieved by the action of a pair of engines that balance the gravitational acceleration. Due to Newton's ...
Investigation of flow behavior inside ejector pumps using finite difference technique
(University of Missouri--Columbia, 2012)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] A complete numerical model has been developed to characterize the performance under different flow conditions. Finite Difference-based method was used ...
Molecular dynamics simulation of nanosintering processes
(University of Missouri--Columbia, 2010)
In this thesis, two scenarios of simulations are studied by molecular dynamics (MD) method. The first one will investigate the neck growth in the laser sintering of different-size gold (100) nanoparticles under different ...
Analysis of oscillatory flow and heat transfer in an oscillating heat pipe
(University of Missouri--Columbia, 2010)
An advanced physical and theoretical model of a U-shaped minichannel - a building block of an Oscillating Heat Pipe (OHP) - has been developed step by step. a) The gravity and pressure loss at the bend are included in the ...
Development of a predictive model for the design of parts fabricated by fused deposition modeling
(University of Missouri--Columbia, 2010)
The prediction of the behavior of parts fabricated by fused deposition modeling (FDM) is an essential part of transitioning the process from rapid prototyping to rapid manufacturing. The overall part strength of an FDM ...
Automated trajectory generation and guidance for a new launch vehicle flight phases
(University of Missouri--Columbia, 2010)
Much effort has been put into developing technologies for next generation re-usable launch vehicles. Fully re-usable launch vehicles include a booster stage that is designed to land, usually near the launch site, after it ...
Flight mechanics and control for an unpowered reusable launch vehicle
(University of Missouri--Columbia, 2011)
A new strategy has been developed to aid in allowing a reusable launch vehicle to complete the Trajectory Area Energy Management (TAEM) phase of reentry. Using the new trajectory planning and tracking strategy, the reusable ...
Modeling and control of arterial oxygen saturation in premature infants
(University of Missouri--Columbia, 2011)
In this work modeling and control of neonatal infant's blood oxygen saturation (SpO2) is investigated. Through analyzing the biological system, it was shown that the blood is oxygenated through the mechanisms of ventilation, ...