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. ...
A coupled hydrodynamic/structural model for ship/ramp/barge interface
(Monterey, California. Naval Postgraduate School, 2001-12)
A mathematical model describing the fundamental dynamics in the interface problem between a ship, a barge, and a connecting ramp is developed and solved. The hydrodynamics for the ship and the barge are described by a ...
Effects of precipitate size and surface normal orientation on micro-identification and compressive fatigue of NiTi shape memory alloys
(Monterey California. Naval Postgraduate School, 2001)
This work seeks to determine the evolution of the indentation and fatigue response of heat-treated Nickel-Titanium shape memory alloys over a range of precipitate sizes and surface normal orientations. Various tests were ...
Analysis and mitigation of mechanical shock effects on high speed planing boats
(Monterey California. Naval Postgraduate School, 2001-09)
United States Special Forces use high-speed planing boats in the performance of their missions. Operation of these boats, particularly in rough seas, exposes the occupants to severe mechanical shock exposure that has been ...
Computational mechanics of the full-scale and model-scale roll-on, roll-off (RORO) stern ramp and experimental modal analysis of the model-scale ramp and support
(2001-06)
It has been determined that current stern ramp designs lack adequate structural integrity during Sea State Three roll-on, roll-off (RORO) operations. Therefore, passive isolation between the stern ramp and the roll-on, ...
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 ...
Online sorting of wood treated with chromated copper arsenate using laser induced breakdown spectroscopy
(2001)
The use of the CCA chemical as a wood treatment to protect against insect and fungal deterioration has had commercial application for the past twenty-five to thirty years. While CCA treated wood has several benefits, with ...
Integrated lifting-surface and Euler/boundary-layer theory analysis method for Marine propulsors
(Monterey California. Naval Postgraduate School, 2001-02)
A propeller lifting surface design and analysis program is automatically coupled with a Euler/integrated Boundary Layer Theory (IBLT) axisymmetric flow solver. The lifting surface method solves the localized propeller ...
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 ...
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