Theses and Dissertations
Finite element modeling of metal foam structures subject to compressive loading
(Monterey, California. Naval Postgraduate School, 2001-12)
A unit-cell model was developed for open metallic foams in order to predict their effective elastic moduli and the plastic collapse strengths. The model is based on the metallic ligament frame of tetrakaidecahedral shape. ...
Synthesis and characterization of Al-Nanodiamond composite powders by high-energy ball milling
(Monterey, California. Naval Postgraduate School, 2011-12)
High-energy ball milling was studied for the ex situ strengthening of aluminum (Al) with nanodiamond (ND). Al-ND metal matrix composite powders with 5 wt% and 10 wt% nanodiamond were synthesized by high-energy ball milling ...
Using x-ray diffraction to assess residual stresses in laser peened and welded aluminum
(Monterey, California. Naval Postgraduate School, 2011-12)
This thesis examines the interplay of residual stress distributions caused by welding and laser peening of marine aluminum alloy 5083. Residual stresses at welds in this alloy can cause fatigue and stress corrosion cracking ...
Modeling the biodynamical response of the human head for injury analysis
(Monterey, California. Naval Postgraduate School, 2001-09)
The objective of this study is to develop a finite element model of the human head and neck to investigate the biomechanics of head injury. The finite element model is a two-dimensional, plane strain representation of the ...
AUV steering parameter identification for improved control design
(Monterey, California. Naval Postgraduate School, 2001-06)
Any effort to provide precision control for an Autonomous Underwater Vehicle requires an accurate estimation of both the vehicles physical and hydrodynamic parameters. Here a vehicle model for controlled steering behaviors ...
Analysis of the transition in deformation mechanisms in superplastic 5083 aluminum alloys by orientation imaging microscopy
(Monterey, California. Naval Postgraduate School, 2001-09)
m alloys used in automotive, aerospace and military applications. Superplasticity requires fine grains with high-angle boundaries and resistance to failure by cavitation. OIM permits grain-specific orientation determination ...
Nucleate boiling heat transfer study of direct immersion cooling of a 3x3 array of vertically orientated electronic components in a dielectric fluid
(Monterey, California. Naval Postgraduate School, 1992-09)
Direct application of two-phase heat transfer in the liquid cooling of electronic components in fluorinated hydrocarbons (FC-72), is severely inhibited by the excessive amount of superheat required to initiate nucleate ...
Experimental investigation of an oscillating flow generator
(Monterey, California. Naval Postgraduate School, 2010-03)
The objective of this project was to construct and test a device that can transform fluid flow into the continuous oscillatory linear motion of a hydro/airfoil. This device may be used to generate power from a renewable ...
Development of a spherical combustion chamber for measuring laminar flame speeds in Navy bulk fuels and biofuel blends
(Monterey, California. Naval Postgraduate School, 2011-12)
This thesis presents the results of an experimental study to determine laminar flame speeds using the spherical flame method. An experimental combustion chamber, based on the constant-volume bomb method, was designed, ...
Dynamic response of soldered electronic components under impact loading
(Monterey, California. Naval Postgraduate School, 2011-12)
The objective of this research was to analyze the effects of impact loading on electronic component failure. A standard fiberglass composite printed circuit board (PCB) card was used in two impact tests. The first test ...
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