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Now showing items 21-40 of 274
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 ...
Advanced analysis of short-fiber polymer composite material behavior
(University of Missouri--Columbia, 2006)
Short-fiber polymer composites experience widespread use in many industrial applications, where the orientation states of the short-fibers within the polymer matrix define the material properties of the composite structure. ...
Development of an integrated approach combining artificial neural network material based on modeling with finite element analysis of forming processes
(University of Missouri--Columbia, 2005)
The use of a finite element model for design and analysis of a metal forming processes is limited by the incorporated material model's ability to predict deformation behavior over a wide range of operating conditions. ...
Specific bio-modeling and analysis techniques at cellular and systems level
(University of Missouri--Columbia, 2006)
Modeling approaches are developed for two different levels, cellular (Part I) and systems (Part II), and used to develop insights into system performance. PART I consists of three chapters focusing on computational ...
Torque ripple attenuation for an axial piston swash plate type hydrostatic pump: noise considerations
(University of Missouri--Columbia, 2006)
The main goal of this work is to reduce the disturbing noise generated by axial piston swash plate type hydrostatic pumps by attenuating the shaft torque variation. The analysis begins by deriving the equation of the shaft ...
Finite element analysis of residual stress generation during spot welding and its affect on fatigue behavior of spot welded joints
(University of Missouri--Columbia, 2005)
This dissertation presents the finite element based prediction of residual stress generation in a spot welded joint during the spot welding process and the effects of residual stress on fatigue behavior of a spot welded ...
Exploratory development of VARIM process for manufacturing high temperature polymer matrix composites
(University of Missouri--Columbia, 2005)
This research focuses on an exploratory development of vacuum assisted resin infusion molding (VARIM) process for manufacturing high temperature polymer composite materials. High temperature matrix composites are needed ...
A development of the motile sperm sorting microfluidic devices
(University of Missouri--Columbia, 2007)
The objectives of this research are developing and improving an inexpensive and convenient microfluidic device to apply to sperm cell sorting. Based on well known soft-lithography fabrication method which contains rapid ...
A study of parametric excitation applied to a MEMS tuning fork gyroscope
(University of Missouri--Columbia, 2007)
The current MEMS ( gyroscopes which normally use the electro static force to excite the comb drive are faced with the limitations such as low precision, coupling problem, and poor robustness. We propose to use parametric ...
Nonlinear control and active damping of a forced-feedback metering poppet valve
(University of Missouri--Columbia, 2007)
For a metering poppet valve which was developed at the University of Missouri (MU valve), the valve can be configured for performance at the cost of stability. It is desirable to achieve both performance and stability using ...
Analysis and modeling of direct selective laser sintering of two-component metal powders
(University of Missouri--Columbia, 2005)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Direct Selective Laser Sintering (SLS) is an emerging technology of Solid Freeform Fabrication (SFF) that 3-D parts are built from the metal-based ...
Characterization of drillability of sandwich structure of carbon fiber reinforced epoxy composite over titanium alloy
(University of Missouri--Columbia, 2006)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Composite-over-Titanium structures are the major candidates for substitution of conventional materials in aerospace industries. This paper investigates ...
Nanomechanical property characterization of femoral head materials
(University of Missouri--Columbia, 2006)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Orthopedic Implants under long-term physiological loading could produce changes in the surface mechanical properties and possible failure. The knowledge ...
Investigation of fanless PCs : design and optimization
(University of Missouri--Columbia, 2009)
The purpose of this research is to fundamentally explore the limitations of natural convection as it pertains to the cooling of desktop personal computers (PCs) and, in particular, maximize total thermal loads while ...
Kinematic analysis of cam profiles used in compound bows
(University of Missouri--Columbia, 2009)
The first compound bow was invented in Missouri in 1969. [Allen, 1968] Compound bows are uniquely different from other types of bows in that they use a set of cables, cams and pulley, and two elastic limbs that act as ...
Signal processing techniques for nonlinearity identification of structures using transient response
(University of Missouri--Columbia, 2009)
In this work, an alternate method for determining nonlinearity of vibrating structures is investigated. In contrast to previous approaches, transient vibrations have been used in combination with advanced signal processing ...
Blackbody temperature calculations from visible and newa-IR spectra for gas-fired furnaces
(University of Missouri--Columbia, 2005)
The goal of this research work is to develop a system capable of measuring multiple factors of interest in the operation of gas-fired furnaces. The primary focus is the development of a model for calculating wall or flame ...
Neutron diffraction study of load response and residual stresses in WC-(Ni/Co) composites
(University of Missouri--Columbia, 2005)
The in-situ response of WC-Ni and WC-Co composites under compressive loading was measured using neutron diffraction techniques. These measurements give a clear indication of the elastic strain behavior of both the carbide ...
Advanced analysis and design of polymer sheet extrusion
(University of Missouri--Columbia, 2007)
A manufacturing process design methodology is presented which can be used to improve the production of polymer components manufactured via the extrusion. The design methodology employs polymer process modeling, design ...