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Results 15251 - 15260 of 18,906
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Torsion tests of 24S-T aluminum-alloy noncircular bar and tubing

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

Date: January 1, 1943
Creator: Moore, R L & Paul, D A
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Summary of results of tests made by aluminum research laboratories of spot-welded joints and structural elements

Summary of results of tests made by aluminum research laboratories of spot-welded joints and structural elements

Date: November 1, 1942
Creator: HARTMANN E C & Stickley, G W
Description: Available information concerning spot welding as a means of joining aluminum-alloy parts has been summarized and comparisons have been made of the relative merits of spot-welded and riveted aluminum-alloy structural elements. The results indicated that spot welding was as satisfactory as riveting insofar as resistance to static loads is concerned. Spot welds showed slightly lower resistance to impact loads but definitely lower resistance to repeated loads than rivets.
Contributing Partner: UNT Libraries Government Documents Department
A preliminary investigation of the electrical structure of thunderstorms

A preliminary investigation of the electrical structure of thunderstorms

Date: July 1, 1942
Creator: Workman, E J & Holzer, R E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effects of prior fatigue-stressing of the impact resistance of chromium-molybdenum aircraft steel

Effects of prior fatigue-stressing of the impact resistance of chromium-molybdenum aircraft steel

Date: March 1, 1943
Creator: Kies, J A & Holshouser, W L
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effect of rivet and spot-weld spacing on the strength of axially loaded sheet-stringer panels

Effect of rivet and spot-weld spacing on the strength of axially loaded sheet-stringer panels

Date: August 1, 1942
Creator: Ramberg, Walter; Levy, Samuel & Mcpherson, Albert E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Ovalization of tubes under bending and compression

Ovalization of tubes under bending and compression

Date: March 1, 1944
Creator: Demer, L J & Kavanaugh, E S
Description: An empirical equation has been developed that gives the approximate amount of ovalization for tubes under bending loads. Tests were made on tubes in the d/t range from 6 to 14, the latter d/t ratio being in the normal landing gear range. Within the range of the series of tests conducted, the increase in ovalization due to a compression load in combination with a bending load was very small. The bending load, being the principal factor in producing the ovalization, is a rather complex function of the bending moment, d/t ratio, cantilever length, and distance between opposite bearing faces. (author).
Contributing Partner: UNT Libraries Government Documents Department
Curing of resin-wood combinations by high-frequency heating

Curing of resin-wood combinations by high-frequency heating

Date: December 1, 1942
Creator: Von Hippel, Arthur R & Dietz, A G H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Torsion tests of a monocoque box

Torsion tests of a monocoque box

Date: November 1, 1942
Creator: Levy, Samuel; Mcpherson, Albert E & Ramberg, Walter
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Torsional stability of aluminum alloy seamless tubing

Torsional stability of aluminum alloy seamless tubing

Date: March 1, 1939
Creator: Moore, R L & Paul, D A
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.
Contributing Partner: UNT Libraries Government Documents Department
Motion of the two-control airplane in rectilinear flight after initial disturbances with introduction of controls following an exponential law

Motion of the two-control airplane in rectilinear flight after initial disturbances with introduction of controls following an exponential law

Date: September 1, 1937
Creator: Klemin, Alexander
Description: An airplane in steady rectilinear flight was assumed to experience an initial disturbance in rolling or yawing velocity. The equations of motion were solved to see if it was possible to hasten recovery of a stable airplane or to secure recovery of an unstable airplane by the application of a single lateral control following an exponential law. The sample computations indicate that, for initial disturbances complex in character, it would be difficult to secure correlation with any type of exponential control. The possibility is visualized that the two-control operation may seriously impair the ability to hasten recovery or counteract instability.
Contributing Partner: UNT Libraries Government Documents Department