Browsing Mechanical Engineering Theses and Dissertations by Issue Date
Now showing items 1-20 of 993
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Boiling Heat Transfer to Liquid Nitrogen and to Liquid Helium
(1960)Experimental data on free convection and nucleate boiling was taken in liquid nitrogen and liquid helium using platinum wires as heating elements. The results in liquid helium and particularly in liquid nitrogen were ... -
A Study of Combustion in Supersonic Streams
(1964)Supersonic combustion of reactive aluminum alkyl fuels has been experimentally demonstrated in two-dimensional ducted combustors and adjacent to a flat plate. Fuel was injected from the combustor walls through multiple ... -
Correlation Studies of Pressure Fluctuations on the Ground Beneath a Turbulent Boundary Layer
(1965)Narrow-band pressure correlation measurements in the frequency range ,008 to 1 Hz(cps) were obtained from a cross spectral analysis between pairs of microphones placed on level ground beneath the wind stream. The ... -
Expert System for Process Selection and Operation Optimization
(1986)The working of an Expert System, PRODUCER, conceived as part of a CIM system for a plant manufacturing discreteparts, is presented. PRODUCER starts out by determining if the desired part can be produced. Based on part ... -
The Stress Field Surrounding the Tip of a Crack Propagating in a Finite Body
(1987)The goal of this dissertation was to establish the relationship between a parameter descriptive of the trajectory of a smoothly curving crack, such as the curvature of the crack path, and the local stress state in the ... -
Heat Transfer and Pressure Drop of Liquid Cooled Offset Fin Heat Exchangers
(1993)An experimental and modeling study of heat transfer and pressure drop in liquid-cooled offset fin compact heat exchangers (cold plates) is described. Liquid coolants used in the testing are water and PAO (polyalphaolefin), ... -
Simultaneous Measurements of the Velocity and Vorticity Vector Fields in the Turbulent Near Wake of a Circular Cylinder
(1993)Hot-wire measurements of all components of the instantaneous velocity and vorticity vectors in the wake of a circular cylinder are presented. The experiments were performed at x / d = 20 and 30, at Reα = 2000, using a ... -
Stress Intensity Factors for Structural Steel I-beams
(1996)The application of fracture mechanics to highway steel bridges has been hampered by a lack of stress intensity factor (SIF) solutions for cracks in I-beams. Previous work cannot provide satisfactory solutions. In this ... -
A MANUFACTURING PROCESS AND MATERIALS DESIGN ADVISOR
(1996)A computer assisted tool, called the DESIGN ADVISOR, has been developed to help obtain a compatible set of candidate materials and manufacturing processes in a fast and straightforward manner. Information for seventeen ... -
Experimental and Theoretical Investigation of Oil Retention in a Carbon Dioxide Air-Conditioning System
(2003)In a closed loop vapor compression cycle, a small portion of the oil circulates with the refrigerant flow through the cycle components while most of the oil stays inside the compressor. The worst scenario of oil circulation ... -
Development of a Simulation and Optimization Tool for Heat Exchanger Design
(2003)Heat exchangers have been used extensively and play an important role in the capital cost, energy efficiency and physical size of refrigeration and air conditioning systems. In this dissertation, a simulation and optimization ... -
Reliability Assessment of Optical Fibers under Tension and Bending Loads
(2003-10-29)The mechanical failure of optical fibers must be avoided to ensure reliability of fiber-based systems. The first stress event in a fiber's lifetime is the proof test. The proof test will alter the fiber's strength distribution ... -
INTEGRATED TEMPERATURE MEASUREMENT AND CONTROL IN POLYMER MICROFLUIDIC SYSTEMS
(2003-11-06)Methods for integrating electrical components in low cost polymer microfluidic systems are presented. These methods include deposition and photolithographic patterning of thin-film metal layers on polycarbonate and ... -
EFFECT OF ENCAPSULANT ON HIGH-TEMPERATURE RELIABILITY OF THE GOLD WIREBOND ALUMINUM BONDPAD INTERFACE
(2003-11-11)Conventional plastic encapsulated microcircuits (PEMs) are increasingly being used in harsh environments such as automotive, well-logging, aerospace and military applications. There is a need, therefore, to examine their ... -
EXPERIMENTAL QUALIFICATION ASSESSMENT AND FAILURE ANALYSIS FOR REWORKED AND TRIMMED EMBEDDED RESISTOR TECHNOLOGIES
(2003-11-19)Discrete passive components are continuing to increase in use in electronic systems even though manufacturers are increasing the degree to which these systems are integrating. Driven by performance, size and economic ... -
DISTRIBUTED SENSING FOR FLEXIBLE STRUCTURES USING A FIBER OPTIC SENSOR SYSTEM
(2003-11-21)In this dissertation, a framework is developed and demonstrated for the use of a new shape measurement system consisting of fiber Bragg grating (FBG) based strain sensors, a shape determination algorithm based on Frenet ... -
DEVELOPMENT AND APPLICATION OF COMPUTER-AIDED FRINGE ANALYSIS
(2003-12-04)Photo-mechanics methods have matured and emerged as important engineering tools. Although numerous image-processing algorithms have been developed to complement interferometric measurement techniques, these algorithms ... -
Field-Effect Flow Control in Microfluidics
(2003-12-04)Lab-on-chip (LOC) devices have miniaturized routine laboratory processes for automated, high-throughput chemical analysis. Separations of biomolecules, including protein and DNA, have been performed with high efficiencies ... -
Continuously Graded Extruded Polymer Composites for Energetic Applications Fabricated Using Twin-Screw Extrusion Processing Technology
(2003-12-05)A novel method of fabricating functionally graded extruded composite materials is proposed for propellant applications using the technology of continuous processing with a Twin-Screw Extruder. The method is applied to the ... -
Life Consumption Monitoring for Electronics
(2003-12-10)Life consumption monitoring is a method to assess product's reliability based on its remaining life in a given life cycle environment. The life consumption monitoring process involves continuous or periodic measurement, ...