Engineering Commons^™

A Study Of Decarburization In Sae 1042 Steel: Its Effect On Fatigue Life, Tensile Properties, And Fatigue Fractography, Daniel A. Bales

Masters Theses

The R. R. Moore rotating-beam fatigue test was used to determine the effects of-increased surface decarburization on the fatigue life of SAE 1042 steel. This test was conducted on three series of test specimens: (1) specimens having no surface decarburization (series D-1), (2) specimens having a 0.038 inch (0. 97 mm) decarburized surface layer (series D-8), and (3) specimens having a 0.080 inch (2.03 mm) decarburized surface layer (series D-24). In addition to the fatigue tests, the change in various tensile properties resulting from surface decarburization was investigated for each of the three test series utilizing the standard ASTM tensile …

The Socio-Economic Impact Of The Airport Upon The Community, Alfred F. Eaton Jr.

Masters Theses

The purpose of this study was to analyze the socio-economic impact that an airport has upon a community and to develop a method of determining that impact suitable for usage by an airport manager.

Data is presented which illustrates the magnitude and scope of the socio-economic impact of an airport. The various methods of analyzing this impact are discussed. Finally, a method of determining the impact, designed for airport managers, is presented.

Some of the main conclusions of the research are as follows: that it is very difficult to measure the total socio-economic impact of an airport upon the community, …

Energy Conservation And Economic Analysis Of Residential Refrigerators, Robert A. Hoskins

Masters Theses

A detailed computer model is developed to calculate energy flows and electricity use for residential refrigerators. Model equations are derived from application of the first law of thermodynamics, analysis of manufacturers' literature, and related studies. The model is used to evaluate the energy (and associated initial cost) impacts of alternative designs to reduce refrigerator energy use.

Model results show that 56% of the total heat gain in a typical 0.45 m³ (16 ft³) top-freezer refrigerator is due to conduction through cabinet walls and doors. The remaining 44% is from door openings, heaters, fans, food, gasket area infiltration, …