Engineering Commons^™

The Effect Of An Induction Field On Transducers., Ratilal S. Patel

Masters Theses

"This report presents the results of an experimental investigation on the effect of an induction field on transducer output. Various types of transducers; strain gages, thermocouples, and thermistors, were used. The changes in the output of these transducers were measured for various induction field conditions.

Measurements must often be made where strong electrical fields are present. Strain gages are used to measure the stresses in electrical machinery. Thermocouples and thermistors used for measuring the temperature of materials undergoing heat treatment with an induction heater are also subjected to an induction field.

The general experimental procedure was the same throughout the …

The Effect Of A Lubricant On Tool-Workpiece Interface., Kenneth Eugene Spencer

Masters Theses

"The purpose of this study was to compare the effects of cutting fluids and the method of application to an orthogonal cutting process.

The cutting operation was performed on a lathe. The fluids use d were compressed air and a solution of emulsifiable oil and water.

The flooding of the area was produced by directing a copious supply of fluid over the cutting a rea. The directed stream was obtained by pumping the fluid through a small hole drilled into the tool holder, immediately above and behind the tool face, which directed the fluid at the tool-chip interface.

The results …

Anodic Dissolution And Disintegration Of Indium, Thallium, And Indium-Cadmium Solid Solutions And Valency Of The Ions Going Into Solution., Richard Lloyd Martin

Masters Theses

"Indium was found to form only In⁺³ ions when dissolving anodically in aqueous acid solutions. Thallium dissolves anodically in acid solutions giving Tl⁺¹ ions only. The reason why Faraday's law is not being formed is that the anode undergoes partial disintegration producing small metallic particles.

Disintegration of these anodes depends on several factors: the nature and concentration of the corrosive medium, the surface condition of the anode, the current density, and the temperature of the corrosive solution. Disintegration may be due to different mechanisms depending on the nature of the electrolyte" -- Abstract, p. ii

Stiffness Of Lightweight Reinforced Concrete Beams, Rameshchandra H. Patel

Masters Theses

"This work is a presentation of the findings of an experimental measurement of stiffness (El) for reinforced and nonreinforced lightweight and normal concrete. The experimental values of stiffness are compared with values obtained using standard reinforced concrete theory. In all, thirty beams, fifteen for lightweight and fifteen for normal concrete, each having the compressive strength of approximately 4, 500 psi, were tested. In addition to stiffness measurements, a relationship was obtained between the dynamic modulus of elasticity and the ultimate compressive strength at various ages for the particular lightweight concrete used"--Abstract, page ii.

Mass Transfer To Droplets: Effect Of Non-Newtonian Continuous Phase., Hsin Chih Wu

Masters Theses

"Since non-Newtonian fluids are frequently encountered in the chemical and process industries, it is important that the transport processes which are commonly encountered be thoroughly investigated. Although studies of fluid mechanics and heat transfer with these fluids have been reported, virtually no work has been reported in the study of mass transfer. This is particularly true of mass transfer in turbulent flow.

The purpose of this investigation is to study the liquid-liquid mass transfer phenomenon in turbulent flow associated with single droplets in non-Newtonian continuous phases. The results are compared with those obtained in Newtonian systems. The data obtained will …

Velocity And Kinetic Energy Distribution Of A Submerged Jet., Patrick Shepard Couch

Masters Theses

"The velocity distribution in a cylindrically bounded region of water induced by a submerged axisynnnetric jet of water, has been investigated. Velocity profiles at successive levels were constructed. The continuity equation was shown to be only approximately verified by the velocity profiles.

The kinetic energy for each level was computed and given mathematical expression"-- Abstract, p. 2

A Study Of Cation Exchange And Soil Properties, Arthur G. Follett

Masters Theses

“The objective of this investigation is to study the effect of clay content and cation exchange capacity on the liquid and plastic limits of a soil system in the natural, flocculated, and dispersed states. Putnam and Clarksville natural soils found extensively in Missouri and a synthetic soil composed of Kaolin clay and Clarksville fine sand and silt were tested.

The results of the investigation indicate that a general relationship exists between the high cation exchange capacity of a soil and the extreme variances of the liquid and plastic limit values for the flocculated and the dispersed states. The cation exchange …

The Toxic Effects And Fate Of Selected Pesticides In Natural Water., Donald Lee Evans

Masters Theses

"The extensive application of synthetic organic pesticides in the United States has created many problems, particularly with respect to fish life. While a number of investigations have been undertaken to determine the toxicity of several pesticides to various species of fish, a great deal of research work is needed before the problem is completely understood.

The individual toxicities of DDT, BHC, 2.,4-D, and Sevin to western golden shiners were determined by means of the bioassay procedure at a t empera t ure Of 16oc. The four chemicals studied were found to be toxic to the test fish with Median Tolerance …

Effect Of Poly-Ethylene Glycol, A Non-Shrinking Agent, On Strength Properties Of Concrete., Vasantrai Vallabhbhai Desai

Masters Theses

"This thesis describes laboratory test made on plain concrete cylinders and ~earns for compressive strength, flexural strength, durability and shrinkage, using poly-ethylene glycol (ElOOO) as a non-shrinking admixture. The tests were conducted in the Materials Laboratory of the Civil Engineering Department.

The test results show that poly-ethylene glycol has the effect of reducing the compressive and flexural strength of plain concrete. The admixture also has the effect of reducing shrinkage, and reversing it, causing expansion with large percentage of its use. For the number of cycles of alternate freezing and thawing reported the admixture did not have any effect on …

A Study Of Crystallization Of Synthetic Fluor-Glaucophane Compositions, Kartini Tjokroatmodjo

Masters Theses

"The ability to form a stable glass and the crystallization properties of four compositions close to that of glaucophane, Na₂Mg₃Al₂Si₈O₂₂(OH)₂ studied. Three glasses were compared with a fourth glass containing no fluorine. The crystallization products of all four glasses were examined between the temperature range 600 - 1200°C. The crystallization products of the three fluorine containing glasses were similar, consisting of mica below 1000°C and of mica, fluor-glaucophane, enstatite and forsterite above 1000°C. In the fluorine free glass, enstatite was the only crystalline phase present below 1000°C, however, forsterite …

Artifact Filter., Kent William Swearingen

Masters Theses

"Peripheral blood pulse monitors are highly susceptible to noise-artifact-- in their present stage of development. The purpose of this thesis is to demonstrate a feasible means for filtering the artifact, using existing monitors. Since no peripheral pulse monitor (transducer) was available for experimentation, a simulated test input was devised with frequency variations from JO cycles/minute to 1.50 cycles/minute.

The filtering circuit predicts the time location of each input pulse. The location of the prediction is governed by the accuracy of the preceding prediction. This is controlled by an R-C timing circuit with a Schmitt Trigger and relay.

From the data …

Estimating Bench Design Parameters For Open-Cut Excavation, Rajni K. Gandhi

Masters Theses

"There are no direct relationships available that provide a basis for bench design of multiple-bench, open-cut earth excavations in competent materials when power shovels are employed. This study was undertaken to determine if mathematical design expressions could be developed when the production rate, material's properties, and equipment operating characteristics were known.

It was found that all bench dimensions were a function of the bench height, which in turn was controlled by the required rate of production. The investigation revealed that suitable relationships could be developed to guide in the control of bank stability, choice of shovel capacity, determination of the …

The Anodic Dissolution And Disintegration Of Gallium And Aluminum And The Initial Valency Of The Ions Entering Aqueous Solutions., Kenneth Anderson Poush

Masters Theses

Gallium dissolved very slowly in dilute acids like HC1, H₂SO₄and HCIO₄. The rate was substantially accelerated if the metal was connected with a platinum electrode in the same solution. From the volume of the hydrogen developed the trivalency of gallium ions going into solution was calculated. This same ionic charge was obtained from coulometric measurements using gallium-amalgam as the anode. The initial ionic charge of aluminum dissolving from an aluminum amalgam anode was evidenced as being plus three by coulometric measurements.

Gallium and aluminum anodes were found to partially disintegrate while the current flowed. …

Optimalization By Peak-Holding, Curtis W. Dodd

Masters Theses

"The problem presented is a study of the peak-holding method of optimalization. This method applies to a system that has an extremum.

After describing how the complete system, consisting of the controller and the controlled system, works; variations in the controller are presented. These variations are changes in the final stage of the controller, the servo. A phase-plane analysis shows how the output of the controlled system varies with its rate of change. Limitations are presented which tell why the system cannot be kept at its peak value at all times. Finally an analog simulation is used to study the …

Development Of A Fluor-Mica Dielectric Using Glass-Ceramic Fabrication Methods., James Joseph Tuzzeo

Masters Theses

"A tetrasilicic fluor-mica, K₂Mg₅si₈o₂₀F₄, was synthesized using glass-ceramic fabrication methods. Bubbles, rods, and disks of glass-mica were formed, and heat treated at selected temperatures between 620°c and 1160°c for various time periods. Density changes were correlated to mica content to determine the relative amounts of crystalline mica phase precipitated after heat treatment. Dielectric losses and dielectric constants of the glass-mica disks were measured for correlation to mica content"--Abstract, p/ ii

Real Time Testing With A Time Scaled Analog Computer., Wayne F. Balsman

Masters Theses

"A present limitation to the testing of a physical subsystem within an analog simulation is that the analog computer must compute in real time. If it is necessary to time scale the simulation of the complete system, a physical subsystem of the complete subsystem may not be tested within the simulation. Therefore, a means of changing the time scale of the analog signal is needed to test a physical subsystem within a time scaled analog computer simulation.

In this thesis a means of time conversion by sampling the analog signal at one rate, storing the samples, and reading the samples …

Properties And Perfection Of Zr-H Solid Solutions At Room Temperature., Dirk Heinrich Wiebe

Masters Theses

"The lattice constants of α. - Zr with 122 ppm H are a₂₅ = 3.23622 ± o. 00005 Å and c₂₅ = 5 .1526 ± 0. 0003 Å. The thermal expansion coefficients of α - Zr are found to be α_a =4.6 x 10^-6(⁰C^-1) and α_C =11,0 x 10^-6(⁰C^-1) in the range between 15 and 55°c.

The solid solubility limit in the Zr - H system at room temperature and independent of the H pressure was determined by the parametric x-ray method to be …

Solid-Phase Welding Of Nodular Iron To Low Carbon Steel., Scott H. Carriere

Masters Theses

“This paper presents an experimental investigation of the possibility of using solid-phase welding to join nodular iron to low carbon steel. Included is a review of available literature on solid-phase welding, tracing its origin from early Egypt to the present day. There was no previously reported work found on the welding of nodular iron to steel.

Experiments were performed to determine what temperature-pressure combination gave the greatest ultimate tensile strength These experiments resulted in the best welds being produced with an end load of 7000 pounds (35.700 psi) on a half inch diameter sample. The majority of these welds proved …

Study Of Mass Transfer In Oscillating Droplets., Subhash Vishnu Gangal

Masters Theses

"The object of this investigation was to study the resistance to mass transfer inside single oscillating liquid droplets falling in a liquid medium. The following four systems were studied: (1) 3% acetic acid in nitrobenzene and water, (2) 25% acetic acid in nitrobenzene and water, (3) 3% acetic acid in nitrobenzene and glycerin in water, and (4) benzyl alcohol and water. The individual mass transfer coefficients were computed by using the Handlos and Baron relation and were compared with the experimentally determined dispersed phase mass transfer coefficients. The average absolute deviation of the observed values of dispersed phase mass transferred …

Separation Of Cationic And Colloidal Fractions Of Radioactive Fission Elements By Electrodialysis., Ronald Dean Mitchell

Masters Theses

"The rapid increase in radioisotope applicat i ons necessitates improved technology for separation and purification of the fission product elements. Electrodialysis techniques employing Permutit anion exchange membranes (3148) and cation exchange membranes (3142) were used to separate strontium from cesium and to fractionate cerium from promethium. The methods were based upon organic complex formations in basic solution.

Separations of radio strontium and radio cesium were affected with both anion and cation exchange membranes in a three-cell electro dialyzer with EDTA as a chelating agent at a pH of 11.0o Fractionation of radiocerium and radio promethium were affected with anion exchange …

Investigation Of The Effect Of The Wall Thickness On The Residual Stresses Developed In Thick Wall Cylinders Due To Water Quenching From The Outside Surface., Ghanshyam Chandubhai Patel

Masters Theses

"This investigation has been made to determine the residual stresses in thick wall cylinders by the use of strain gages.

The cylinders were quenched from their outer surface i n water from a temperature of 1000°F, and the resulting residual stresses were determined by Sachs boring-out method. The effect of the wall thickness of the cylinders on the residual stresses and the error developed due to the boring operation were discussed"--Abstract, p. ii

Densification Studies Of Three-Component Refractory Grog Systems., Jerome Dale Patterson

Masters Theses

"The bulk density and crushing strength properties of three-component refractory grog systems that were formed by mechanical impact or by mechanical vibration were determined.

Aqueous alkali silicate solutions of various types, concentrations, and amounts were investigated as room temperature binders for these grog systems. Compositions having maximum bulk densities were determined for each of six different three-component refractory grog systems. The densification rate curves for systems formed by mechanical impact were determined"--Abstract, p. ii

Determination Of The Shapes Of Fixed And Moving Polodes Of Class Ii Four Bar Mechanisms., Manharkumar Kantilal Sheth

Masters Theses

"The purpose of this thesis is to determine the shapes of fixed and moving polodes of class II four bar mechanisms, since there has been little, or no work done in determining their shapes.

Twenty different mechanisms were taken to study the shape of the fixed and moving polodes. The best equation which fits each curve was found by using the least square method in polynomials. Coefficients for each curve were determined with the help of the I.BM 1620 computer. The equation was found to be a six-degree polynomial which fits very well to each curve. There seems to be …

The Effects Of Surface Flaw Density And Configuration On Fracture Stresses Of A Triaxial Porcelain., William H. Daniels

Masters Theses

"The fracture behavior of a model brittle solid containing artificial surface flaws was studied. An industrial ceramic porcelain body was employed as the model brittle material. Sample groups of specimens containing 6, 11, 24, 49,. and 90 sharp surface notches uniformly distributed over a four inch length were broken under pure bending. The fracture data we-re compared to those of an identically treated control group containing no artificial flaws.

The mean strengths of the two groups of lowest flaw density were identical, both being significantly less than that for the control group. Further increases in flaw density resulted in increased …

The Electrical Analogy Of Critical Speed For The Transverse Vibrations Of A Shaft With One, Two And Three Masses, Ashok Z. Patel

Masters Theses

"The object of this thesis is to determine the critical speed of a shaft by an electrical analogy. The shaft considered is of constant diameter and is simply supported at the ends by fixing it in self aligning bearings. The weight of the shaft is assumed to be proportionally distributed in the attached masses.

The original system is first of all converted to an equivalent simple spiring mass system by calculating the influence coefficients and hence frcan these determining the spring constants. The spring mass system obtained is then converted to an equivalent electrical circuit.

A sine-square wave frequency generator …

Application Of An Orifice Meter To Fan Testing., J. F. T. Agapito

Masters Theses

"In this investigation the application of an orifice meter to fan testing was studied and evaluated. An orifice meter was designed and was installed in a centrifugal fan duct. Measurements were checked and compared with those of a standard pitot-tube traverse and were found to be in very close agreement. It is suggested that a meter of this type could easily be adapted not only to laboratory work but also to field tests"--Abstract, p. ii

Solid Solubility Of Sodium Oxide In Tricalcium Aluminate, Joel A. Conwicke

Masters Theses

"The tie line connecting the compounds 3CaO·Al₂O₃ and Na₂O·8CaO·3Al₂O₃ in the ternary system CaO-Al₂O₃-Na₂O was studied at 1250° Celsius.

It was determined that Na₂O can exist in crystalline solution with 3CaO·Al₂O₃ in percentages of about 2.3% or less without any apparent change in the structure of 3CaO·Al₂O₃. X-ray diffraction peaks in the back-reflection region shifted to lower d-spacing values on increasing Na₂O contents.

At a Na₂O content of about 2.7%, each major x-ray …

A Study Of The Separation Of A Mixture Of Carbon Dioxide And Hydrogen By Means Of An Orifice., Larry Gene Bauer

Masters Theses

"The purpose of the investigation was an attempt to verify a statement made by Partridge in an effort to discover a new method of separating gaseous mixtures. Partridge stated that when a constant pressure is applied on two gases of different specific gravity, a larger volume of the l igl1ter gas is forced through the orifice. Orifices of 1.016, 0.319, and 0.222 millimeter in diameter were used in the course of the investigation.

It was found that with the apparatus used in the research endeavor, no separation of the mixture of hydrogen and carbon dioxide could be obtained"--Abstract, p. i

A Study Of The Stabilization Of Putnam Silt Loam With Large Organic Cations, George C. Bennett Jr.

Masters Theses

"Laboratory tests were conducted to determine if Aliquat, a quaternary ammonium chloride compound, could be used to change the physical properties of Putnam silt loam. The effects of adding varying amounts of Aliquat to the soil were measured in terms of the results of Atterberg limits tests, the moisture-density relationship, unconfined and triaxial compressive strength, and capillary adsorption characteristics. A small change in the Atterberg limits, the optimum moisture content, and the maximum dry density was noted. An increase in the unconfined compressive strength and a reduction in the moisture adsorption potential was accomplished by the addition of 0.25 and …

The Effect Of Surface Roughness, Cure Pressure, And Temperature Level On The Thermal Resistance Of Bonds And Contacts, David Leo Schwaller

Masters Theses

"This investigation was conducted to determine the thermal effect of temperature level, surface roughness, and curing pressure on bars and bonded interfaces.

The equipment used in this investigation is shown in Fig. 1 and Fig. 2. The four specimens used, cylindrical aluminum alloy bars, were cut radially at their midpoints and faced on a lathe. Heat was supplied by an electrical resistance heating element and an ice bath was used to conduct heat from the alloy specimen. A heat shield was used to insure one dimensional heat flow. Spacers were placed in the insulation at the top, the interface, and …