Engineering Commons^™

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 …

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 …

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

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 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 …

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 …

A Theoretical And Experimental Study Of The Stress Distribution In An Infinite Plane Shrink-Fitted On Four Circular Elastic Pins, Charles H. White

Masters Theses

"The purpose of this study is to show a general method of solution for multiple inclusions in an infinite plane. The shrink-fitting of an infinite plane upon the inclusions, or pins, will be simulated by force-fitting the pins into a large sheet of birefringent material, to obtain an experimental verification of the analytical solution.

The problem to be approached is that of four circular elastic pins shrink-fitted in an infinite plane. The method of superposition will be used, and the stresses at any point in the plane found with respect to a common origin of coordinates. It will first be …

The Effects Of Granular Size On The Thermal Conductivity Of Fine Sand, Fikri Yalvac

Masters Theses

"The Thomas method (1) for determining the thermal conductivity of solid materials can be used for the determination of the thermal conductivity of granular materials. In this thesis this method has been used to determine the effect of the granular size of sand cn its thermal conductivity.

River sand was classified according to size by the Tyler Standard Screen Scale into 50-60, 50-80, 80-100, 100-200, and below 200 mesh size. These sands were used for the experiments. The clay was separated from these samples to obtain pure river sand for the experiments.

According to the International Critical Tables, the thermal …

A Rubber Membrane Analogy For The Study Of Shafts In Torsion., Myron D. Bruns

Masters Theses

"The thesis presents a review of literature giving reference to several books which present the many and varied methods of determining the shearing stresses in shafts. However, no reference was found that used a rubber membrane analogy similar to that used in th is thesis. The theory of torsion, the membrane theory, and its analogy have been presented for a better understanding of the subject. Illustrations are used freely for clarity.

Analytical methods and solutions are given for two problems. The first method is that of writing a Saint-Venant stress function and satisfying the necessary conditions for it to be …

Use Of Sr-4 Strain Gages Under Hydraulic Pressure, Manubhai M. Patel

Masters Theses

"In this investigation an attempt has been made to determine the effects of hydraulic pressure on SR-4, type A-5 strain gages. A thick-walled aluminum alloy cylinder without end constraint was used to make an experimental study of the effects of hydraulic pressure on these strain gages.

The behavior of this cylinder under different internal hydraulic pressures was also studied by measuring the strains by means of strain gages which were attached to the inside and outside surface of the cylinder. The problem has been studied by applying pressures up to 4800 psi.

Because of the high internal fluid pressures various …

The Design, Construction, And Operation Of A Conducting Field Analog Computer., Richard T. Johnson

Masters Theses

"The purpose of this investigation is to design and construct a simple conducting field analog to solve problems described by the two-dimensional Poisson or Laplace equations. Decisions concerning choice of conducting media, construction of problem models, and design and construction of a specialized power supply with instrumentation were based on the results of previous experiments. Several problems are solved using the designed apparatus. Partial solutions to these problems are displayed in graphical form.

The greatest deviation of the experimental results from iterative values was consistently less than 8%. In most cases the deviation was less than 6%. The console arrangement …

A Study Of Rotational Critical Speeds For A Multi-Mass System By Influence Coefficients, Kantikumar G. Patel

Masters Theses

"In this investigation an attempt has been made to determine the critical speeds of a multi-mass rotational system by using influence coefficients. Modes of vibrations are also examined at these critical speeds.

A shaft carrying five masses, supported by bearings at the ends, has been studied analytically. The length of the bearings is considered small with respect to the shaft length and therefore, the configuration is assumed to be point supported as a simple beam. The five masses, each weighing one pound, were placed at equal distances of 10 inches on a 60 inch shaft. The critical speed was examined …

Minimum Frictional Characteristics Of Optimum Journal Bearings., Navinchandra F. Shah

Masters Theses

"This investigation was conducted to develop a graphical representation to determine the optimum bearing conditions for minimum friction and to establish a theoretical approach for journal bearing design.

A series of graphs has been plotted for· the coefficient of friction versus the eccentricity ratio based on the. Sommerfeld number derived from Reynolds' differential equation, f or optimum journal bearings.

The results obtained in this research have been compared with those developed by other investigators. This comparison confirms the validity of the results presented in this thesis, so that it could be used advantageously for the design of optimum journal bearings"-- …

The Development Of A Temperature Probe And Temperature Survey Of The Interaction Of An Oblique Shock Wave And A Turbulant Boundary Layer, Donald M. Yano

Mechanical Engineering ETDs

The purpose of this investigation was to develop a miniature air temperature probe and to measure temperatures in the interaction region of an oblique shock wave and a turbulent boundary layer.

Test 855: Allis-Chalmers D-21 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 854: Massey-Ferguson Mf 25 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 853: John Deere 4020 Lpg, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 852: John Deere 3020 Lpg, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 850: John Deere 4020 Gasoline, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 851: John Deere 3020 Gas, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 849: John Deere 4020 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 848: John Deere 3020 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 847: Oliver 1900 Series B Diesel 4wd, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 846: Oliver 1800 4wd, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 845: Ford 5000 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Analysis Of The Transient Response Of A Flat Rotating Disk By Generalized Transforms, Kenneth Wayne Chase

Theses and Dissertations

The object of this thesis was to lay a foundation for a comprehensive study of the dynamic response of rotating members. This initial phase of the study includes a theoretical investigation and proposes experimental techniques for the determination of the stresses and strains in a thin, rotating disk with a concentric hole, subjected to transient shaft inputs. There are many practical applications of this problem including computor memory storage disks, turbine rotors, grinding wheels, saw blades, gears, optical reflectors, and solar sails for space vehicles.

Analysis Of Steady State Heat Flux Measurement By The Initial Slope Technique, Charles Earl Cartmill

Theses and Dissertations

The impulse technique is progressively being developed for determining the steady state rate of heat transfer systems involving exponential temperature-time histories. A pulse thermocouple system has been utilized in such a technique having a steady state response time on the order of one time constant of the thermocouple used. When an impulse thermocouple system is not used, the required time in obtaining the steady state value is on the order of five time constants or the time required to reach steady state.

Heat Flux Measurement By Miniature Calorimeters, Gary Rex Coffin

Theses and Dissertations

During recent years an increasing number of technical firms and manufacturers have begun to specify heat flux, energy input per unit area per unit time, as a testing and designing criteria. This change in the boundary condition (to heat flux from temperature excess or others) evolved from the idea that each material has a characteristic burning temperature. Therefore, the rate of ablation or burning depends mainly upon the rate of energy input into the specimen, and not its temperature. Thus, the need for a flux measuring device became more acute.

Radiant Flux Distribution From Concave Radiation Sources, Richard K. Duke

Theses and Dissertations

In order to analyse the radiant heat transfer characteristics of a concave source, two vital concepts must be clearly understood. The first is called the apparent emissivity Ea and is a function of both the local total emissivity E and of the geometry of the source. Although the total emissivities of ordinary substances range between zero and one, the two extremeties never occur. Surface emissivities which approach these values in the limit, must be created mechanically from materials in the range 0

The Aerodynamic Drag On Spheres Under Acceleration, Charles Earl Nielson

Theses and Dissertations

The requirement of a greater understanding of the behavior of solids-gas systems has shown itself profoundly with the advancement of science and technology during recent years. The range and variety of processes in which these systems play an important role is exceptionally broad. These processes range from meteorological disturbances such as dust storms, rain and snow, to the use of vacuum cleaning equipment. With the advancement of aircraft and space technology the influence of these systems is again felt in such cases as the motion of rockets, missiles and aircraft in flight, the behavior of liquid droplets or metallic particles …