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Title: High speed tool steel on lathe work
Creator: Hayes, C. E., Wilson, F. N.
Date: 2009, 1906
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/highspeedtoolste00haye
Thesis (B.S.)--Armour Institute of Technology

Title: EFFECTS OF UNSTEADY AERODYNAMICS ON VERTICAL-AXIS WIND TURBINE PERFORMANCE
Creator: Kozak, Peter
Date: 2014, 2014-05
Description: Vertical-axis wind turbines (VAWTs) o er an inherently simpler design than horizontal-axis machines, while their lower blade speed mitigates...
Show moreVertical-axis wind turbines (VAWTs) o er an inherently simpler design than horizontal-axis machines, while their lower blade speed mitigates safety and noise concerns. As a result, VAWTs can be used to open up more populated areas for large-scale wind energy development. While vertical-axis turbines do o er signi cant operational advantages, development has been hampered by the di culty of mod- eling the aerodynamics involved, along with their rotating geometry. This thesis presents results from a simulation of a baseline VAWT computed using Star-CCM+, a commercial nite volume (FVM) code. Overset grid techniques are used to model the VAWT's complex and moving geometry. VAWT aerodynamics are shown to be dominated at low tip-speed ratios by dynamic stall phenomena and at high tip-speed ratios by wake-blade interactions, using ow visualization and blade angle of attack. An iterative procedure to optimize the VAWT's geometry is developed using blade pitch to mitigate the adverse e ects of dynamic stall for a tip-speed ratio of 2.0 case. Relying on both a constant blade pitch o set as well as a variable blade pitch as a function of azimuthal angle, power output was shown to be increased by 17% and 38%, respectively, compared to the baseline case. Emphasis is placed on the modeling techniques used in the FVM simulation and the optimization process.
M.S. in Mechanical and Aerospace Engineering, May 2014
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Title: AN OPTIMIZATION OF MANUFACTURING PROCESS SELECTION THROUGH COSTING AND SYSTEMATIC ANALYSIS
Creator: Klima, Kevin
Date: 2017, 2017-05
Description: In order for any company to remain competitive, there is a constant push to cut costs while keeping customers satisfied by providing quality,...
Show moreIn order for any company to remain competitive, there is a constant push to cut costs while keeping customers satisfied by providing quality, robust products. While current methods for predicting the most cost effective manufacturing process have proven to offer a significant amount of utility for design engineers, the issue remains that for a cost estimation to be truly accurate, the component has to be completely or nearly completely designed, which could require a significant amount of upfront development time. The goal was to develop a design tool to predict the most cost effective process to manufacture a new component based solely on already available historical data and basic knowledge of the design requirements of the new part. This study focused on steel components that could be manufactured either as a fabrication or as a casting. Two real-world applications were studied from two separate industries, with each application being designed with each process. Common cost estimation techniques were used to develop models for predicting the cost for each component to offer insight for how the cost would be expected to vary with quantity. As a means of ensuring robustness and that each competing model was structurally equivalent, each model had to pass critical exceptional and fatigue load cases in FEA while also meeting predefined success criteria. Using the results from the structural analysis and cost estimation, a design tool was developed as a means of objectively predicting how a component with similar application requirements would most cost effectively be manufactured based on the desired quantity of parts that needed to be produced. By using historical information of similar components that have the possibility of being manufactured in more than one way, more effective and systematic decision making for how a new component should be manufactured was shown to be possible. A third, independent case study was also selected as a real world example from industry as a means of validating and assessing the sensitivity of the weighting used in the development of the design tool. This was used to further refine the tool for the use in analyzing future components.
M.S. in Manufacturing Engineering, May 2017
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Title: Manufacture and uses of steel pipes
Creator: Harvey, James S., Jr.
Date: 2009, 1914
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/manufactureuseso00harv
Thesis (B.S.)--Armour Institute of Technology, 1914 Bibliography: leaf 82 B.S. in...
Show morehttp://www.archive.org/details/manufactureuseso00harv
Thesis (B.S.)--Armour Institute of Technology, 1914 Bibliography: leaf 82 B.S. in Mechanical Engineering, 1914
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Title: Design for power plant
Creator: Henwood, P. E.
Date: 2009, 1910
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/designforpowerpl00henw
Thesis (B.S.)--Armour Institute of Technology

Title: The design and equipment of a metallographic polishing machine
Creator: Hallett, John A.
Date: 2009, 1921
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/designequipmento00hall
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaf 18

Title: RATE AND TEMPERATURE DEPENDENT MECHANICAL BEHAVIOR AND MODELING OF AL-CU ALLOY SYSTEM
Creator: Tran, Henry
Date: 2011-12-19, 2011-12
Description: Deformation of materials in army applications such as fragment impact, projectile penetration and air blast/shock waves involves high strain...
Show moreDeformation of materials in army applications such as fragment impact, projectile penetration and air blast/shock waves involves high strain rates, large strains, high pressures and rapid changes in temperature, where overall performance ultimately depends on the evolution of flow stress, failure initiation and propagation, generally in the form of adiabatic shear banding (ASB), under these severe loading conditions. Some of 2XXX series aluminum-copper (Al-Cu) alloys such as Al 2519-T87 have been successfully used in Lightweight Armored Vehicles in the U.S. Army because of their good ballistic properties. More recently, an Al-Cu-Mg-Ag alloy designated as Al 2139-T8 has emerged in 2004 as a strong candidate in damage critical applications with higher strength and high-strain-rate performance than its predecessors. Its better ballistic performance is believed to be due to the underlying microstructure. The objective of this study is to investigate mechanical and deformation behavior of Al-Cu material system to develop a fundamental understanding of the effect of composition and microstructural features on overall dynamic behavior. To this end, a systematic approach is adopted to start from single crystal Al and move towards polycrystalline Al, then Al-Cu, and all the way to Al-Cu-Mg-Ag system. Current thesis study constitutes a part of this ongoing work and, therefore, only covers single crystal Al ([001] and [111] directions), polycrystalline Al, and Al-0.1%Cu. Compressive mechanical response of each one of these materials has been investigated in a wide strain rate range that covers quasi-static (from 10-4 to 100 s-1) and dynamic (from 102 to 104 s-1) strain rate regimes. With the exception of single crystal Al (because of limited supplies), additional experiments have been conducted at 120C and 220C within the same strain rate range to understand their thermal softening behavior in varying strain rate regimes. Based on and driven by experimental results, a modified Johnson-Cook model is proposed to describe their rate and temperature dependent constitutive behavior. Finally, in order to investigate susceptibility of these materials and varying microstructures to adiabatic shear localization the two specimen geometries, namely “top hat” and “shear-compression specimen”, have been evaluated. In this evaluation, emphasis is placed upon reliable quantification of strain field within the gage section. Shear compression specimen has been identified to be the best candidate to use in future studies that will explore the tendency of each one of these materials to failure by adiabatic shear banding.
M.S. in Mechanical and Aerospace Engineering, December 2011
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Title: AIRFOIL LONGITUDINAL GUST RESPONSE IN ATTACHED, SEPARATING, AND DETACHED SURGING FLOW
Creator: Weirich, Jeremy Michael
Date: 2013, 2013-12
Description: Longitudinally gusting ow over a nominally two dimensional airfoil is exam- ined over a range of incidence angles and reduced frequencies. The...
Show moreLongitudinally gusting ow over a nominally two dimensional airfoil is exam- ined over a range of incidence angles and reduced frequencies. The response of the airfoil to these gusting ows is compared with classical theory, and is found to follow theory moderately well at low incidence angles across all reduced frequencies. At high incidence angles, the predictive power of the classical model is found to decrease signi cantly. The aerodynamic forces are also decomposed into circulatory and non- circulatory e ects and their relative strength is examined. The circulatory e ects are found to be minimal and constant at low incidence angles, while high incidence angles show strong variation, indication that the wake structure experiences signi - cant changes. The noncirculatory e ects are found to depend linearly on the reduced frequency and a ect the ow more strongly at lower incidence angles. An argument is made for the utility of dividing analysis of the ow into attached ow, separating ow, and fully detached ow regimes. The division is clear when examining how the normalized force coe cients change with reduced frequency, and provides a useful tool for predicting the transition of the ow between regimes.
M.S. in Aerospace Engineering, December 2013
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Title: COMPARING LAGRANGIAN COHERENT STRUCTURES FROM ASSIMILATING OCEAN MODELS TO OCEAN COLOR IMAGES
Creator: Riley, Jordan
Date: 2012-01-04, 2012-12
Description: Lagrangian coherent structures (LCS) have been used to study transport on the ocean surface. The material barrier and separatrix properties of...
Show moreLagrangian coherent structures (LCS) have been used to study transport on the ocean surface. The material barrier and separatrix properties of LCS provide means to compare data-assimilative ocean models. LCS obtained from these models are compared to ocean color images and satellite derived products such as chlorophyll concentration and sea surface temperature from the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument aboard the Terra and Aqua satellites. The ability of the LCS to match the satellite images provides insight into the accuracy of the ocean models in capturing predominant ow structures. Two of the ocean model systems use the U.S. Navy Coastal Ocean Model (NCOM), and two model systems use the HYbrid Coordinate Ocean Model (HYCOM). Speci cally, the model systems are the Intra American Seas Nowcast/Forecast System (IASNFS), the NCOM American Seas, the HYCOM + NCODA Global 1/12 , and the HYCOM + NCODA Gulf of Mexico 1/25 .
M.S. in Mechanical and Aerospace Engineering, December 2012
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Title: Investigation of pitot's tubes as a watermeter
Creator: Yoshida, H. T.
Date: 2009, 1912
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/investigationofp00yosh
Thesis (B.S.)--Armour Institute of Technology

Title: An investigation of the flow of liquid fuel through orifices
Creator: Marks, Milton, Clausen, Harold F., Wong, Yak M
Date: 2009, 1920
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/investigationoff00mark
Thesis (B.S.)--Armour Institute of Technology

Title: Investigation of the flow of air in pipes
Creator: Canman, E.l., Kimball, N.f.
Date: 2009, 1912
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/investigationoff00canm
Thesis (B.S.)--Armour Institute of Technology

Title: Investigation of the physical characteristics of various kinds of wire
Creator: Clucas, G. W, Paradise, L. A
Date: 2009, 1906
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/investigationofp00cluc
Thesis (B.S.)--Armour Institute of Technology, 1906 Bibliographical references (leaves....
Show morehttp://www.archive.org/details/investigationofp00cluc
Thesis (B.S.)--Armour Institute of Technology, 1906 Bibliographical references (leaves. 15-16) and index B.S. in Mechanical Engineering, 1906
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Title: MEASUREMENT MODEL OF IONOSPHERIC ELECTRON CONTENT WITH CYGNSS
Creator: Zhang, Jordi Xing
Date: 2013, 2013-12
Description: Global ionospheric imaging is currently limited by a lack of significant quantities of observations over the oceans. This deficiency of...
Show moreGlobal ionospheric imaging is currently limited by a lack of significant quantities of observations over the oceans. This deficiency of measurements arises because coverage from Global Navigation Satellite System (GNSS) remote sensing tools is typically limited to regions over land by using ground-based receivers. This dissertation presents the opportunity to estimate ionospheric data over the oceans by using reflected GNSS signals received by the upcoming Low-Earth Orbit (LEO) satellite constellation Cyclone Global Navigation Satellite System (CYGNSS). CYGNSS is currently being developed by NASA primarily for hurricane predictions. Its eight micro-satellites will have a single-frequency Global Positioning System (GPS) receiver onboard and zenith and nadir antennas that collect GPS signals reflecting from the ocean surface of Earth. This study investigates the possibility of leveraging CYGNSS for a secondary science mission, using GNSS-Reflectometry for ionospheric remote sensing. A mathematical model is developed that retrieves ionospheric electron content by using ranging measurements from direct and ocean-reflected GPS signals onboard CYGNSS satellites. The measurement model terms can be grouped as geometric raypath and signal refraction components due to the troposphere and the ionosphere. Each term of the model is analyzed and quantified by applying fundamental physical principles and empirical models. The implementation of a multi-orbit simulation estimates the magnitudes of anticipated electron content measurements with CYGNSS.
M.S. in Mechanical and Aerospace Engineering, December 2013
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Title: MECHANICAL PROPERTIES AND MICROSTRUCTURE OF HEAT AFFECTED ZONE IN HPS 100W STEEL
Creator: Lu, Junhua
Date: 2011-11-21, 2011-12
Description: In the present investigation, thermal simulated specimens were used to investigate the effect of peak temperature during welding on...
Show moreIn the present investigation, thermal simulated specimens were used to investigate the effect of peak temperature during welding on characteristic fracture toughness and microstructural features of the heat-affected zones (HAZ) of HPS 100W Steel. HPS 100W is a new grade of bridge steel included in ASTM A709 Standard. The material was subjected to varying thermal profiles to simulate the different subzones of HAZ and the resultant microstructures were observed and mechanical properties determined. HAZ simulation was carried out in a Gleeble 3500 at different peak temperatures of 850oC, 1100oC and 1300oC with heat inputs of 3kJ/mm along with specimens transverse or longitudinal to the rolling direction. Subsequently, impact toughness data were obtained at different temperatures by means of a Charpy test. Finally, the different microstructures were characterized using optical microscopy, SEM and TEM in order to correlate the structure-property relationship of the HAZ for HPS 100W steel. Due to small heat-input and accelerated cooling, the grain size in HAZ is relatively small and the structures are ductile. The Charpy impact results show the transverse rolling direction toughness for lower peak temperature and base material have lower values than that of longitudinal direction samples. Nevertheless even the lowest Charpy values obtained are well above minimum values required for structural application transportation. The HAZ showed higher absorbed impact energy in lower temperature. Also, precipitation dissolution study of NbC and Cu was carried out in the end. Cu element is the strengthening element. The NbC have grain refining effect at elevated temperature.
M.S. in Science and Engineering, December 2011
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Title: Materials used in concrete construction
Creator: Houghton, V. A.
Date: 2009, 1906
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/materialsusedinc00houg
Thesis (B.S.)--Armour Institute of Technology;Includes bibliographical references leaves...
Show morehttp://www.archive.org/details/materialsusedinc00houg
Thesis (B.S.)--Armour Institute of Technology;Includes bibliographical references leaves 53-54 and index
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Title: Measurement of the flow of water by salinity and coloration methods
Creator: Morse, R. L., Bechaud, J. P.
Date: 2009, 1917
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/measurementofflo00mors
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaf 2

Title: An investigation of the effect of the degree of superheat on the economy of a Marsh boiler-feed pump
Creator: Menkin, Jesse Irlis, Stillman, Edwin Howard
Date: 2009, 1909
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/investigationofe00menk
Thesis (B.S.)--Armour Institute of Technology, 1909 Includes bibliographical references...
Show morehttp://www.archive.org/details/investigationofe00menk
Thesis (B.S.)--Armour Institute of Technology, 1909 Includes bibliographical references and index B.S. in Mechanical Engineering, 1909
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Title: An investigation of 20 gallon chemical fire extinguishers
Creator: Mintz, C. W., Trask, F. A.
Date: 2009, 1919
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/investigationof200mint
Thesis (B.S.)--Armour Institute of Technology

Title: An investigation into the effect of extreme temperatures on the tensile properties of steels
Creator: Peterson, Harold C., Hall, Thomas W.
Date: 2009, 1920
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/investigationint00pete
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaves 46-48

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