Digital Commons Network^™

Thermocouple Shape Influence On Response In A Dynamic Compressible Fluid Atmosphere, Philip J. Steger

Masters Theses

"This investigation was performed to determine whether the geometrical shape of a thermocouple used to measure the temperature of a dynamic fluid atmosphere had any affect on its recovery factor and time response.

A converging nozzle was used to establish a dynamic fluid stream in which shaped silver solder junctions of copper-constantan thermocouples were tested. The velocity of the working fluid, air, was about 1000 ft/sec at the test point.

The investigation was successful, within experimental limits, in determining that the recovery factor of a bare thermocouple junction is not influenced by geometrical shape The results agreed substantially with available …

Experimental Stress Analysis Of Bolts In A Flange Coupling, Bansidhar Shah

Masters Theses

"This thesis deals with the strength of a bolted joint which is subjected to tensile and bending loads. The purpose of this investigation was to derive expressions for the stresses developed in the bolts and the load producing separation of the joint.

A laboratory study of a flange coupling was made and the behaviour of flange bolts under different clamping forces was studied in tension and bending tests. The strain in the bolt was measured by mounting the strain gages on the shank of the bolt. From this, a graph of applied load versus strain in the bolt was plotted. …

A Dilatometric Study Of The Martensite Transformation And Maraging Behavior Of A Ni- Co- Mo Steel, Neal Matthias Griesenauer

Masters Theses

"An experimental investigation or the austenite to martensite transformation and the maraging behavior taking place in a nickel-cobalt-molybdenum steel was conducted for this project.

The austenite to martensite transformation was followed by the dilatometric method, being done on a Leitz Optical Dilatometer. An apparatus was constructed for the dilatometer in order to record dimensional changes at low temperatures, thus broadening the possible applications for the instrument.

The maraging behavior was investigated by means of metallographic analysis and hardness determinations"--Abstract, page i.

A Graphical Solution Method For The Tchebychev Elliptic Function Filter, Gene S. Luckfield

Masters Theses

"This thesis is concerned with the design of the Tchebychev elliptic function filter. The Darlington synthesis procedure is discussed and salient points from Darlington's paper needed for the design of this filter are presented.

It is shown that the design of the Tchebychev elliptic function filter requires a knowledge of the elliptic functions, particularly the elliptic sine. Since the use of these functions is not common, a brief review of their properties is presented.

Using the elliptic functions, a development of the equations describing the behavior of the Tchebychev elliptic function filter is given for the case of a normalized …

A New Method Of Making Stainless Steel Powder By Electrochemical Disintegration, Mohammed Maher Saad

Masters Theses

"This paper describes a new method of making austenitic stainless steel (18/8) powder by electrochemical disintegration. The method used an external direct current applied to a heat-treated stainless steel anode, and a platinum cathode in an electrolyte of an aqueous solution of 20% HNO₃ and 1% H₂SO₄ by weight respectively.

Special attention has been paid to the size distribution of sieve and sub-sieve sizes, and the following ranges were found: approximately one-half lies between the limits of 200 and 325 mesh, and one third is finer than 325 mesh, with the remainder about +200 mesh, average …

A Rc Active Delay Time Network., Robert Sun-Wu Han

Masters Theses

"This thesis presents a method for performing an approximate synthesis of a variable delay time network by using RC elements and active analog computer circuits. The delay networks discussed here can provide delay times which range from zero to 96 milliseconds for inputs with frequencies which range between zero 2nd 5 cycles per second.

Basically, the procedure involves approximating the delay time transfer function, e^-jwTd , by the ratio of two polynomials each of which is represented by a finite series of terms. The ratio is then shown to be easily synthesized by RC elements and analog computer circuits. …

A Study Of A Method For Determining Properties Of Metals At High Strain Rates., Warren Heidbreder

Masters Theses

"An experimental method has been developed for determining the tensile and other physical properties of metals under high loading rates. Experimental equipment was designed, fabricated and tested. It was desirable to keep the equipment simple and inexpensive so that it could be used by operators Lacking experience in electronics and high-speed photography which are required for some of the more sophisticated methods now in use. The energy for pulling the specimens is supplied by smokeless gun powder. The firing of a cartridge into a closed cylinder with movable piston accomplishes the breaking of the specimen. A record of the time, …

Investigation Of Stresses And Deflections In An Inclined Beam., Jayant Chhaganlal Soni

Masters Theses

"In this thesis an investigation has been made of the effect of inclination on strains and deflections in an inclined rectangular steel beam. To compute the strains and deflections Newmark's Numerical Procedure has been used. An experiment has been carried out on a rectangular steel beam for four different load increments and eight different inclinations. To compare the experimental and analytical data, graphs have been drawn for the experimental and analytical quantities of strains and deflections for all the four load increments and eight different angles of inclination. Results of the investigation indicate that the strains and deflections at inclinations …

A Study Of Rotational Critical Speeds For A Multi-Mass, Multi-Span System, Pravinchandra M. Upadhyay

Masters Theses

"It is well known that the unbalanced inertia forces present in rotating shafts set up violent vibrations in a transverse direction at certain speeds known as critical speeds, whirling speeds or whipping speeds. Therefore one who deals with the design of rotating machine parts, such as turbine rotors, multi-cylinder engine crankshafts etc., must consider transverse vibrations of rotating parts.

Practical solutions for finding the critical speeds of simple rotating systems, such as a single disk on a shaft with a single span, were derived by many authors. But as the number of loads and spans increases the problem becomes complex …

Investigation Of Ablation Materials, John Martyn Schattyn

Masters Theses

"The desired result of this paper is to determine what effect the physical and thermal properties of a material have on the ability of that material to act as an ablation heat shield. On the basis of their physical properties, five materials, nickel, beryllium, fused quartz, teflon, and phenolic-nylon, were chosen as examples.

The tools used for this study are heat transfer equations involving a change in material phase. The resulting criteria may be assumed applicable to any material exhibiting one of the four types of ablation processes"--Abstract, page 2.

The Performance Of A Mechanically-Aided Countercurrent Extraction Column., Jerry James Carr

Masters Theses

"In recent years liquid extraction has become a major industrial method for the separation of liquid solutions. Liquid extraction has proven successful in some separations performed only with great difficulty by other, more common mass-transfer operations. Th e industrial utilization of liquid extraction has resulted in considerable interest in the design and performance correlations of high-capacity, high-efficiency extraction equipment.

Continuous countercurrent columns, filled with various packings, baffles, and plates, have been found to be relatively ineffective in liquid extract on service. The density difference of the contacted phases is generally insufficient to, by itself, cause the intimate contact necessary for …

The Effect Of Reradiation On Heat Transmission, Arvindkumar M. Shah

Masters Theses

"In heat transmission by radiation, it is very easy to find the heat transmitted from one surface to another. Much work has been done in this area. The problem becomes complicated when the two surfaces are enclosed or joined by an enclosure. Such problems frequently arise in the design of furnaces. One problem is linked with the economy of fuel, by proper consideration of heat losses through the openings in furnace walls such as doors and burner openings. A second problem is associated with the heating capacity and useful heat transfer through the openings such as heat ports in walls …

Removal Of Alkyl Benzene Sulfonate By Precipitation With Cationic Surfactants., Phillip E. Custer

Masters Theses

"The extensive use of synthetic detergents, particularly the nonbiodegradable alkyl benzene sulfonate (ABS), has created many difficulties in water and wastewater. Although a number of processes have been proposed for the abatement of the synthetic detergent problem, a completely satisfactory solution has yet to be developed.

Following a preliminary investigation, three cationic agents, Bionol R0-50, G-263 and Primafloc C-5 were selected to be studied in detail in order to determine their ability to remove ABS by precipitation. Studies were conducted in deionized water, river water and domestic sewage systems using an initial ABS concentration of 10 mg/1 and cationic dosages …

Hydraulic Transportation Of Coal In Open Flumes., Nallapu Narayan Reddy

Masters Theses

"The objective of this study is to design a simplified form of hydraulic transportation system using open-flumes and operated by gravity in pitching coal seams. This type of system is to be used in conjunction with mining by hydraulic methods where the water used for the extraction of coal can also be used for the loading and transport functions"--Introduction p. 1

Electrolytic Corrosion Of Reinforcing Steel In Concrete., Lawrence D. Green

Masters Theses

"Deterioration of bridge decks has increased the interest in the corrosion of steel in concrete. A comprehensive review of literature on the subject of electrolytic corrosion of steel in concrete is presented in this thesis.

Development of theory from the literature leads to the following statements. There are two causes for electrolytic corrosion of steel in concrete, stray currents from direct current power sources and the formation of macro-cells within the structure. The corrosion caused by the macro-cells appears to be the more important of the two. Anodic areas exhibit corrosion of the steel and cracking of the concrete.

Many …

Determining Stability Of Nonlinear Control Systems Via Lyapunov's Method., John Joseph Komo

Masters Theses

"The problem undertaken in this thesis is to present Lyapunov's method of stability as i t applies to control systems and to use it in the stability analysis of nonlinear control systems. The variable gradient method of generating Lyapunov functions is presented since this seems the best general procedure for obtaining Lyapunov functions. Also, the integration of matrices method is presented as a comparison. ii

Procedures for the use of the variable gradient method and the integration of matrices method are written and several examples are used to illustrate these procedures.

It is concluded that Lyapunov's method is very definitely …

An Equilibrium Study Of The System Bi-S-H₂, Don Hie Lee

Masters Theses

"An experimental study has been conducted to determine the equilibrium behavior of the system Bi-S-H₂. The system was studied by equilibrating H₂-H₂S gas mixtures with Bi(l)- Bi₂S₃(s) two-phase mixtures at temperatures of 500°, 600°, 700° and 750°C in a circulating type equilibrium apparatus. The equilibrium gas mixtures were analyzed by a Fisher Gas Partitioner with a reproducibility of approximately 0.06 %.

A linear free energy equation has been derived from the results with an average deviation of ± 1 Kcal. This deviation is well within the accepted experimental accuracy for …

A Simplified Method Of Estimating Drilling And Blasting Costs Of A Highway Through-Cut Excavation In Rock, Donald J. Roberts

Masters Theses

"The development of cost estimating methods has been the most neglected phase of highway engineering. Overlooked in particular has been the development of an easily understood and easily applied method of estimating the costs of the drilling and blasting operations involved in a highway through-cut excavation in rock.

This investigation developed such a method by adapting and applying recent developments in the blasting planning field. The study was limited to small diameter blastholes and excavations in lifts of less than thirty feet. Normal efficient construction practices were presumed.

It was found from the investigation that the blast geometry and, subsequently, …

Viscosities Of Various Binary Non-Polar Gaseous Mixtures., Gerald Lee Stevenson

Masters Theses

"Viscosity is an important physical property involving the transport of momentum in a fluid. Momentum is transferred within a fluid under an existing velocity gradient as the driving force. Since momentum transfer is actually attained by the dynamic interaction between particles of mass, a description of molecular interaction is essential in order to accurately predict the viscosity of a fluid. Temperature affects fluid viscosity by increasing the kinetic energy of the fluid system and thus the frequency by which molecules are involved in interaction. There have been many theoretical studies made concerning the intermolecular potential energy statements which serve as …

Behavior Of Clay Under Compaction By Vibratory Rollers., Glenn R. Taylor

Masters Theses

"This thesis presents an analysis of the behavior of a lean clay when compacted by commercial vibratory rollers using the results of field investigations conducted by the U. S. Army Engineer Experiment Station, Vicksburg, Mississippi. Conclusions reached indicate that a lean clay soil will behave substantially the same under compaction by a vibratory roller as it does under other conventional methods of field compaction. The relationship of amplitude to the density and moisture content is also examined in this paper with the conclusion that the variations in amplitude of a vibratory roller is not significant as a measure of the …

Determination Of The Standard Free Energy Of Formation Of Zr₃S₂, Peter E. Otten

Masters Theses

"The Knudsen effusion method was used to find the equilibrium magnesium pressure for the reaction

3 Zr (s) + 2 MgS (s) = 'Zr₃S₂' (s) + 2 Mg (v)

By using known standard free energy data for the formation of magnesium sulfide and by using the equilibrium magnesium pressure, the standard free energy of formation of Zr₃S₂ was calculated and could be expressed by the equation

Δ F° = -139,800 + 49.13 T cal/mole

in the temperature range 900 to 1100°C.

It was also found that Zr₃S₂ was the zirconium …

Swelling Properties Of Putnam Soil, Oscar M. Palma

Masters Theses

"Volume change of Putnam soil under different moisture contents and the swelling pressure developed by the soil at the same moisture contents were investigated using standard test procedures.

The theory of one dimensional consolidation of Terzaghi was reviewed as well as the literature on swelling and swell pressure.

It was found that swell depends mainly on the initial water content, while swelling pressure depends mainly on the dry density of the soil"--Abstract, page ii.

The Design, Construction, And Calibration Of A Hydrodynamic Journal Bearing Testing Machine., John H. Roberts

Masters Theses

"The purpose of this investigation was to design, construct, and calibrate a journal bearing testing apparatus. The design, construction, and operation of the apparatus are described.

Two bronze bearings with length to diameter ratios of 1.0 and 0.5 were tested using a gravity oil reed system. The speed and the location of inlet oil supply were varied, and the resulting coefficients or friction, oil flow rates, outlet oil temperatures, bearing shell temperatures, and eccentricities of the bearings were determined. These results were evaluated and compared with theoretical solutions.

The results compared favorably with the theoretical solutions and substantiated the use …

A Thermodynamic Study Of The Molybdenum-Sulfur System At 1100⁰C, Seth C. Schaefer

Masters Theses

"A static method was used to determine equilibrium sulfur pressure for molybdenum-sulfur mixtures at 1100°C.

The results obtained were:
(1) The molybdenum disulfide phase was stable in a sulfur pressure range of 1.023 x 10^-5 to 6.026 x 10^-1 atmospheres. A range of non-stoichiometry from MoS_2.00 to MoS_2.22 was determined under these conditions.
(2) The upper limit of sulfur content of molybdenum sesquisulfide (Mo₂S₃) is nearly stoichiometric.
(3) The extent of solid solution of sulfur in molybdenum is approximately 1.5 atomic % (0.5 wt %).
(4) Molybdenum sesqu-isulfide (Mo₂S_{3 …}

Liquid Mercury Embrittlement Of Thin-Walled 2024 Aluminum Tubes, Edward J. Beckemeyer

Masters Theses

"The dislocation theory, Zener-Stroh crack model, and the Petch relationship, which correlates fracture stress and grain size, were used to analyze the embrittlement of 2024 aluminum alloy tubes by liquid mercury.

Surface energy ratios, [formula], were determined for biaxial stress ratios of 1/2, 1, ∞. The values of the surface energy ratios considered were 4.24, 1.79, 1.46, respectively. As part of this study, an approximate Nabarro-Peierls frictional stress was calculated for each stress ratio"--Abstract, page 2.

An Investigation Of A Constant Velocity Paper Unwinding Device, Jerry L. Gilmore

Masters Theses

"This thesis outlines one approach in designing a system which involves a second order nonlinear differential equation. A large number of variables are involved in this analysis. Therefore, there are many solutions to the problem but only a few of these will satisfy all required conditions. The analysis will be aided by the use of an analog computer. This computer can be manipulated to obtain optimum values for the different variables.

The computer results are presented in graphical form. Reasonable values for the different variables are obtained from these graphs.

The characteristics of the unwinding device were simulated on the …

Linear System Transfer Function Identification, Tuh-Kai Koo

Masters Theses

“An approach using a high speed special purpose digital computer to identify the transfer function of a linear system is presented in this thesis. The data for computation are obtained by measuring the system response and its derivatives periodically with a periodic test signal (impulse) input.

The order of the system is first determined by evaluating the rank of a Hankel matrix. Then, the transfer function is determined by solving two sets of system equations.

Theoretical analysis is emphasized in the study. Two examples are given for the purpose of illustrating the theory

Convective Heat Transfer In Small Enclosed Air Spaces., Joseph Charles Kroutil

Masters Theses

No abstract provided.

Pattern Calculations On A Loaded Spiral Antenna., Jose Briceno

Masters Theses

"The purpose of this thesis is to calculate and p lot the radiation patterns o f a ferrotron-loaded spiral antenna made of semicircles. In particular, this work is confined to a balanced spiral free to radiate in all directions.

The current distribution used in the evaluation of the vector potential is taken from a synthesized current obtained from experimental information on a ferrotron-loaded spiral antenna at a frequency of operation of 200 MC.

The calculated patterns of the spiral antenna are in general single lobed in a direction perpendicular to the plane of the antenna. The beamwidth varies from 62° …

Infrared Modulation Using The Field-Effect Properties Of Germanium., Lloyd E. Brunkhorst

Masters Theses

"The absorption of infrared radiation, by free carriers in germanium, has been used to amplitude modulate infrared radiation. In the experiment, a space charge layer consisting of free carriers is established at the inner surface of a germanium sample by using the field-effect technique. Infrared radiation of a wavelength to which the germanium is transparent is then Internally reflected from this surface. The infrared radiation passes twice through the space charge layer for each internal reflection. With each pass through the space charge layer, the amplitude of the transmitted infrared is decreased. Amplitude modulation of the transmitted infrared is accomplished …