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Creep of 2S-O Aluminum Sheet at 500 and 550 C

Description: Abstract: "Creep and creep-rupture tests were made on 25-O aluminum sheet at temperatures of 500 and 550 C. The estimated stresses that will produce 0.5 per cent deformation and rupture in 10,000 hours at 400, 450, 500, and 550 C (data at 400 and 450 C are from BMI-T-29, dated June 9, 1950) are presented."
Date: September 11, 1952
Creator: VanEcho, J. A.; Simmons, W. F. & Cross, H. C.
Partner: UNT Libraries Government Documents Department

THE RADIOCHEMISTRY OF ALUMINUM AND GALLIUM

Description: "Nuclear Science Series" of the National Research Council. Committee on Nuclear Science. A review of the nuclear and chemical features of these elements which are of particular interest to the radiochemist is presented. A discussion is also included on aspects of sample dissolution and counting techniques followed by a collection of radiochemical procedures for the elements as found in the literature. (J.R.D.)
Date: January 1, 1961
Creator: Lewis, J.E.
Partner: UNT Libraries Government Documents Department

Determination of Dissolved Aluminum in Water Samples

Description: From introduction: The purpose of this report is to test the accuracy and precision of the MIBK extract technique and its suitability for A1 determination in rain, surface waters, ground waters, and effluents obtained from leaching various types of rocks with acidified water. The present study investigates the accuracy, precision, and detection limit of this technique and reports methods for improvement. The purpose of the report also is to test the effect of filtration of water samples and the storage of samples in conventional polythylene (CPE), linear polythylene (LPE), and polypropyene (PP) bottles on accuracy of A1 determination.
Date: 1983
Creator: Afifi, Afifa A.
Partner: UNT Libraries Government Documents Department

Exploratory investigation of static- and base-pressure increases resulting from combustion of aluminum borohydride adjacent to body of revolution in supersonic wing tunnel

Description: Report presenting pressure distribution associated with the stable combustion of aluminum borohydride about a body of revolution in a wind tunnel at Mach number 2.47. Pressure increases on the cylindrical and base surfaces of the model were measured. Results regarding the burning and associated flow phenomena, axial and meridional static-pressure data obtained during combustion, and base-pressure data during combustion are provided.
Date: October 2, 1957
Creator: Serafini, John S.; Dorsch, Robert G. & Fletcher, Edward A.
Partner: UNT Libraries Government Documents Department

Bearing tests of 14S sheet and plate

Description: From Summary: "Tests were made to determine bearing yield and ultimate strengths of bare and Alclad 15S-W(exp 1) and 14S-T(exp 1) sheet and plate in thicknesses of 0.064 inch, 0.250 inch, and 0.750 inch. From the results of these tests it was concluded that the ratios of bearing to tensile properties from the with-grain direction were essentially the same as proposed in NACA TN Nos. 901, 920, 974, and 981 for other high-strength aluminum-alloy sheet and plate."
Date: August 1948
Creator: Moore, R. L.
Partner: UNT Libraries Government Documents Department

Torsion tests of 24S-T aluminum-alloy noncircular bar and tubing

Description: From Summary: "Tests of 24S-T aluminum alloy have been made to determine the yield and ultimate strengths in torsion of noncircular bar and tubing. An approximate basis for predicting these torsional strength characteristics has been indicated. The results show that the torsional stiffness and maximum shearing stresses within the elastic range may be computed quite closely by means of existing formulas based on mathematical analysis and the membrane analogy."
Date: January 1943
Creator: Moore, R. L. & Paul, D. A.
Partner: UNT Libraries Government Documents Department

Torsional stability of aluminum alloy seamless tubing

Description: Torsion tests were made on 51ST aluminum-alloy seamless tubes having diameter-to-thickness ratios of from 77 to 139 and length-to-diameter ratios of from 1 to 60. The torsional strengths developed in the tubes which failed elastically (all tubes having lengths greater than 2 to 6 times the diameter) were in most cases within 10 percent of the value indicated by the theories of Donnel, Timoshenko, and Sturm, assuming a condition of simply supported ends.
Date: March 1939
Creator: Moore, R. L. & Paul, D. A.
Partner: UNT Libraries Government Documents Department

Torsional strength of aluminum-alloy round tubing

Description: Report presenting an analysis of existing data on aluminum-alloy tubing with a wide range of plastic properties in order to establish a useful empirical relationship between tensile yield and ultimate strengths, diameter-thickness ratios, and torsional strengths within the range of plastic buckling.
Date: January 1943
Creator: Moore, R. L.
Partner: UNT Libraries Government Documents Department

An investigation of the effectiveness of stiffeners on shear-resistant plate-girder webs

Description: From Summary: "The results of 60 different tests on 2 aluminum alloy 17S-T plate girders are presented to show the influence of size and spacing of stiffeners upon the buckling characteristics of shear-resistant webs within the elastic range. It is demonstrated that stiffeners increase the stability of a web by retarding the formation subdivided panels. An empirical method of proportioning stiffeners is proposed which recognizes both of these stiffener functions, and comparisons are made with design procedures based upon theoretical considerations of the buckling problem. Also, some experimental data are provided to show the effect of stiffener size and spacing upon ultimate web strengths."
Date: September 1942
Creator: Moore, R. L.
Partner: UNT Libraries Government Documents Department

Bearing strengths of some wrought-aluminum alloys

Description: From Introduction: "Although a number of investigations of the bearing strength of aluminum alloys have been made, the problem remains one of considerable interest to the aircraft industry. For this reason it has seemed advisable to make additional tests of the commonly used aircraft alloys in an effort to establish a better basis for the selection of allowable bearing values. Current design practice does not recognize the effect of edge distance upon bearing strengths, and for this reason edge distance was one of the principal variables considered in this investigation. The increasing emphasis being placed upon permanent set limitations makes it essential that more information on bearing yield phenomena be obtained."
Date: August 1943
Creator: Moore, R. L. & Wescoat, C.
Partner: UNT Libraries Government Documents Department

Bearing strengths of some aluminum-alloy rolled and extruded sections

Description: Report presenting testing to determine bearing yield and ultimate strengths for several sizes of rolled and extruded 14S sections and of rolled 24S-T and 75S-T bar. Results regarding the yield strengths, bearing failures, strength values, and ratios of bearing to tensile properties are provided.
Date: September 1948
Creator: Moore, R. L.
Partner: UNT Libraries Government Documents Department

Bearing strengths of bare and alclad XA75S-T and 24S-T81 aluminum alloy sheet

Description: From Introduction: "A report was recently issued covering an investigation of the bearing properties of the wrought aluminum alloys commonly used in aircraft construction (reference 1). Since this work was undertaken, two new materials, XA75S-T and 24S-T81, have been developed to the commercial stage for aircraft use. The objection of this investigation was to determine the bearing yield and ultimate strengths of these new materials in the form of bare and alclad sheet."
Date: December 1943
Creator: Moore, R. L. & Wescoat, C.
Partner: UNT Libraries Government Documents Department

Observations on the behavior of some noncircular aluminum alloy sections loaded to failure in torsion

Description: Report presenting an investigation of the strength and stiffness characteristics of noncircular aluminum alloy sections loaded to failure in torsion. Results regarding torque-twist and torque-stress curves and stress-distribution diagrams are provided.
Date: February 1947
Creator: Moore, R. L.
Partner: UNT Libraries Government Documents Department

Compressive strength of corrugated-sheet-stiffened panels for consolidated XB-36 airplane

Description: From Summary: "Compression tests were made of 63 panels stiffened with corrugated sheet. The specimens were constructed from artificially aged alclad 24S-T aluminum alloy with minimum guaranteed yield strengths of 57 and 48 kips per square inch for the flat- and corrugated-sheet materials, respectively. Results of the tests are presented in charts which show the average stresses at the maximum load and at buckling of the sheet."
Date: January 1944
Creator: Weinberger, Robert A.; Sperry, William C. & Dobrowski, Charles V.
Partner: UNT Libraries Government Documents Department

Experimental investigation of notch-size effects on rotating-beam fatigue behavior of 75S-T6 aluminum alloy

Description: Report presenting an investigation to study the influence of size, particularly notch-size effect, on extruded 75S-T6 aluminum-alloy test specimens under rotating bending. Results regarding fatigue strength and fatigue-notch factor are provided.
Date: November 1954
Creator: Hyler, W. S.; Lewis, R. A. & Grover, H. J.
Partner: UNT Libraries Government Documents Department

Experimental investigation of creep bending and buckling of thin circular cylindrical shells

Description: From Summary: "Forty-three cylinders of 40-inch length and 16-inch diameter, made of 5052-0 aluminum-alloy sheets of 0.023-, 0.040-, 0.051-, and 0.064-inch thickness, were subjected to bending moments constant along the cylinder and in time in an oven which maintained a constant temperature of 500 degrees Fahrenheit during the test. All the cylinders failed by buckling. The time that elapsed between load application and collapse was measured."
Date: July 23, 1957
Creator: Erickson, Burton; Patel, Sharad A.; French, Francis W.; Lederman, Samuel & Hoff, N. J.
Partner: UNT Libraries Government Documents Department

A study of elastic and plastic stress concentration factors due to notches and fillets in flat plates

Description: Six large 24s-t3 aluminum-alloy-sheet specimens containing various notches or fillets were tested in tension to determine their stress concentration factors in both the elastic and plastic ranges. The elastic stress concentration factors were found to be slightly higher than those calculated by Neuber's method and those obtained photoelastically by Frocht. The results showed further that the stress concentration factor decreases as strains at the discontinuity enter the plastic range. A generalization of Stowell's relation for the plastic stress concentration factor at a circular hole in an infinite plate was applied to the specimen shapes tested and gave good agreement with test results.
Date: September 7, 1951
Creator: Hardrath, Herbert F. & Ohman, Lachlan
Partner: UNT Libraries Government Documents Department

Results of axial-load fatigue tests on electropolished 2024-T3 and 7075-T6 aluminum-alloy-sheet specimens with central holes

Description: From Summary: "Results are presented of axial-load fatigue tests at stress ratios of 0 and -1.0 on electropolished 2024-T3 (24S-T3) and 7075-T6 (75S-T6) aluminum-alloy-sheet specimens with central holes. The specimen widths and hole diameters were varied in order to provide data suitable for a study of the effect of notch size. The data are compared with previously published results of tests on unnotched electropolished specimens and on unpolished specimens containing central holes."
Date: March 1956
Creator: Landers, Charles B. & Hardrath, Herbert F.
Partner: UNT Libraries Government Documents Department

Static shear strength of 2117-T4 (A17S-T4) aluminum-alloy rivets at elevated temperatures

Description: Report presenting static single shear tests of 3/16-inch-diameter 2117-T4 (A17S-T4) aluminum-alloy rivets at elevated temperatures. The maximum temperature tested was 800 degrees Fahrenheit and the time at temperature prior to testing range from 1/2 hour to 720 hours.
Date: January 4, 1956
Creator: Dewalt, W. J. & Bogardus, K. O.
Partner: UNT Libraries Government Documents Department

Melting Aluminum Chips

Description: Report concerning the loss of aluminum experienced during the melting process. This report shows the magnitude of the loss through various experiments. Index begins on page 85.
Date: 1916
Creator: Gillett, H. W. & James, G. M.
Partner: UNT Libraries Government Documents Department

Gurevich Magnetomorphic Oscillations in Single Crystals of Aluminum at Helium Temperatures

Description: The Sondheimer theory was tested by looking for oscillatory phenomena in a group of single crystals representing a range in dimensions from matchbox geometry to thin-film geometry. The single crystals were identical with respect to impurity content, strain, orientation, surface condition, and probe placement.
Date: August 1967
Creator: Mollenkopf, Howard Charles
Partner: UNT Libraries