WorldCat Identities

Langley Aeronautical Laboratory

Overview
Works: 1,717 works in 2,406 publications in 1 language and 8,874 library holdings
Classifications: TL672, 629.1
Publication Timeline
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Most widely held works by Langley Aeronautical Laboratory
Recent research on the determination of natural modes and frequencies of aircraft wing structures by Langley Aeronautical Laboratory( Book )

2 editions published in 1956 in English and held by 38 WorldCat member libraries worldwide

The results of some theoretical and experimental studies of the vibrations of aircraft wing structures are summarized and discussed. Assessment is made of the importance of various effects not usually included in the elementary theories of bending and torsion of box beams, such as transverse shear flexibility, shear lag, restraint of warping, longitudinal (rotary) inertia, and cross-sectional deformability. The substitute stringer method of incorporating the effects of shear lag into the analysis of box-beam vibration is outlined. Natural frequencies obtained experimentally from resonance tests of box-beam specimens are presented and compared with the results of theoretical calculations, and it is shown that good agreement, particularly for the higher modes, requires the inclusion of secondary effects in the analysis. Two recently developed methods of analysis of low-aspect-ratio wings are described. Frequencies and modes calculated by these two methods are compared with those obtained experimentally for a large-scale builtup delta-wing specimen. (Author)
Aerodynamic theory and its application to flutter by Langley Aeronautical Laboratory( Book )

1 edition published in 1956 in English and held by 28 WorldCat member libraries worldwide

Summary of airfoil data by Ira H. A Abbott( Book )

3 editions published in 1945 in English and held by 20 WorldCat member libraries worldwide

The report includes an analysis of the lift, drag, pitching-moment, and critical-speed characteristics of the airfoils, together with a discussion of the effects of surface conditions. Available data on high-lift devices are presented. Problems associated with lateral-control devices, leading-edge air intakes, and interference are briefly discussed. The data indicate that the effects of surface condition on the lift and drag characteristics are at least as large as the effects of the airfoil shape and must be considered in airfoil selection and the prediction of wing characteristics. Airfoils permitting extensive laminar flow, such as the NACA 6-series airfoils, have much lower drag coefficients at high speed and cruising lift coefficients than earlier types-of airfoils if, and only if, the wing surfaces are sufficiently smooth and fair. The NACA 6-series airfoils also have favorable critical-speed characteristics and do not appear to present unusual problems associated with the application of high-lift and lateral-control devices. Much of the data given in the NACA Advance Confidential Report entitled "Preliminary Low-Drag-Airfoil and Flap Data from Tests at Large Reynolds Number and Low Turbulence," by Eastman N. Jacobs, Ira R. Abbott, and Milton Davidson, March 1942 has been corrected and included in the present paper, which supersedes the previously published paper
Column and plate compressive strengths of aircraft structural materials. Extruded R303-T aluminum-alloy by George J Heimerl( Book )

7 editions published between 1945 and 1946 in English and held by 11 WorldCat member libraries worldwide

Column and plate compressive strengths of extruded R303-T aluminum alloy were determined both within and beyond the elastic range from tests of thin-strip columns and local-instability tests of H-, Z-, and channel-section columns. These tests are part of an extensive research investigation to provide data on the structural strength of various aircraft materials. The results are presented in the form of curves and charts that are suitable for use in the design and analysis of aircraft structures
Shear lag in box beams methods of analysis and experimental investigations by Paul Kuhn( Book )

2 editions published in 1942 in English and held by 6 WorldCat member libraries worldwide

Heat transfer and skin friction for turbulent boundary layers on heated or cooled surfaces at high speeds by Coleman duP Donaldson( Book )

2 editions published in 1952 in English and held by 4 WorldCat member libraries worldwide

Abstract: The method presented in NACA TN 2692 for evaluating the skin friction of a turbulent boundary layer in compressible flow on an insulated surface is extended to evaluate the turbulent skin friction and heat transfer in compressible flow on a surface which is heated or cooled. The results of this analysis are in good agreement with the heat transfers measured in flight on the NACA RM-10 missile up to Mach number of 3.8
Tables and charts for the evaluation of profile drag from wake surveys at high subsonic speeds by Myron J Block( Book )

4 editions published in 1945 in English and held by 4 WorldCat member libraries worldwide

Tables and charts for the evaluation of profile drag from wake surveys at high subsonic speeds are presented. These tables and charts are for use with two methods of evaluation, an exact method that may be applied to wakes of any shape and a simple approximate method that may be applied when the variation of total-pressure loss across the wake has the typical form (resembling a cycle of a cosine-squared curve)
Critical stress for an infinitely long flat plate with elastically restrained edges under combined shear and direct stress by Elbridge Z Stowell( Book )

3 editions published in 1943 in English and held by 4 WorldCat member libraries worldwide

A simple interaction curve is presented for evaluating the conditions of combined shear and direct stress under which an infinitely long, flat plate with equal elastic restraints against rotation along the edges will become unstable. The theoretical work that led to the interaction curve is presented in the form of appendixes
Critical combinations of longitudinal and transverse direct stress for an infinitely long flat plate with edges elastically restrained against rotation by S. B Batdorf( Book )

3 editions published in 1946 in English and held by 3 WorldCat member libraries worldwide

A theoretical Investigation was made of the buckling of an infinitely long flat plate with edges elastically restrained against rotation under combinations of longitudinal are presented that give the critical combinations of stress for several different degrees of elastic edge restraints Including simple support and complete fixity. It was found that an appreciable fraction of the critical longitudinal stress may be applied to the plate without any reduction in the transverse compressive stress required for buckling
Principles of moment distribution applied to stability of structures composed of bars or plates by Eugene E Lundquist( Book )

3 editions published between 1943 and 1945 in English and held by 3 WorldCat member libraries worldwide

The principles of the cross method of moment distribution, which have previously been applied to the stability of structures composed of bars under axial load, are applied to the stability of structures composed of long plates under longitudinal load. A brief theoretical treatment of the subject, as applied to structures composed of either bars or plates, is included, together with an illustrative example for each of these two types of structure. An appendix presents the derivation of the formulas for the various stiffnesses and carry-over factors used in solving problems in the stability of structures composed of long plates
Tables of stiffness and carry-over factor for flat rectangular plates under compression by W. D Kroll( Book )

2 editions published in 1943 in English and held by 2 WorldCat member libraries worldwide

Tables of stiffness and carry-over factor are presented for infinitely long flat plates subjected to a uniformly distributed longitudinal compressive load. The tables are intended for use in solving problems in the stability of structures composed of plates under compression
Effect of normal pressure on the critical compressive and shear stress of curved sheet by Norman Rafel( Book )

2 editions published in 1945 in English and held by 2 WorldCat member libraries worldwide

Results are presented of tests of two sets of 20 curved-sheet specimens to determine the effect of normal pressure on the critical compressive and shear stress of curved sheet. It was found that normal pressure raised the critical compressive and shear stress of curved sheet except when outward bulging occurred in compression, in which case the critical stress was lowered by normal pressure
The strength and stiffness of shear webs with and without lightening holes by Paul Kuhn( Book )

2 editions published in 1942 in English and held by 2 WorldCat member libraries worldwide

Nearly 200 tests were made on the strength of shear webs of 24S-T aluminum alloy, with and without lightening holes. The tests were made in a jig of the single-specimen type, in which the specimen is free to collapse completely without developing diagonal tension. The lightening holes were circular and had either flanged edges or beaded edges, the specimens with flanged edges constituting by far the largest test group
Charts for calculation of the critical stress for local instability of columns with I-, Z-, channel, and rectangular-tube section by W. D Kroll( Book )

2 editions published in 1943 in English and held by 2 WorldCat member libraries worldwide

Charts are presented for the calculation of the critical stress for local instability of columns with I-, Z-, channel, and rectangular-tube section. These charts are intended to replace the less complete charts published in NACA Technical Note No. 743. The values used in extending the charts are computed by moment-distribution methods that give somewhat more accurate values than the energy method previously used and also make it possible to determine theoretically which element of the cross section is primarily responsible for instability
Charts for calculation of the critical compressive stress for local instability of idealized web- and T-stiffened panels by Rolla B Boughan( Book )

2 editions published in 1944 in English and held by 2 WorldCat member libraries worldwide

Charts are presented for the calculation of the critical compressive stress - the stress at which local instability occurs - for idealized web- and T-stiffened panels, and examples of the use of the charts are given
The effect of internal pressure on the buckling stress of thin-walled circular cylinders under torsion by Harold Crate( Book )

2 editions published in 1944 in English and held by 2 WorldCat member libraries worldwide

The results of a series of tests to determine the effect of internal pressure on the buckling load of a thin cylinder under an applied torque indicated that internal pressure raises the shear buckling stress. The experimental results were analyzed with the aid of previously developed theory and a simple interaction formula was derived
The strength and stiffness of shear webs with round lightening holes having 45 degree flanges by Paul Kuhn( Book )

2 editions published in 1942 in English and held by 2 WorldCat member libraries worldwide

Tests were made of 18 shear webs with round lightening holes having 45 degree flanges. The purpose of the tests was to extend the range of a previous investigation to larger ratios of hole diameter to web depth and of web depth to web thickness. Simple empirical formulas are given for the strength and the stiffness of shear webs; these formulas incorporate the results of the previous investigation. Design charts are also given to facilitate the application of the results
Effect of normal pressure on the critical compressive stress of curved sheet by Norman Rafel( Book )

2 editions published in 1942 in English and held by 2 WorldCat member libraries worldwide

Results are presented of tests of two specimens tested to study the effect of normal pressure on the critical compressive stress for thin curved sheets. These specimens are designated by their respective rib spacings of 10 inches and 30 inches. The relationship between compressive stress and normal pressure at which buckles disappeared is independent of whether the buckles were made to disappear by increase of normal pressure or decrease of compressive stress
Approximate stress analysis of multi-stringer beams with shear deformation of the flanges by Paul Kuhn( Book )

2 editions published in 1938 in English and held by 1 WorldCat member library worldwide

Stresses around rectangular cut-outs in skin-stringer panels under axial loads - II by Paul Kuhn( Book )

2 editions published in 1943 in English and held by 1 WorldCat member library worldwide

Cut-outs in wings or fuselages produce stress concentrations that present a serious problem to the stress analyst. As a partial solution of the general problem, this paper presents formulas for calculating the stress distribution around rectangular cut-outs in axially loaded panels. The formulas are derived by means of the substitute-stringer method of shear-lag analysis. In a previous paper published under the same title as the present one, the analysis had been based on a substitute structure containing only two stringers. The present solution is based on a substitute structure containing three stringers and is more complete as well as more accurate than the previous one. It was found that the results could be used to improve the accuracy of the previous solution without appreciably reducing the speed of calculation. Details are given of the three-stringer solution as well as of the modified two-stringer solution
 
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Alternative Names

controlled identityLangley Research Center

Hampton (Va.). Langley Aeronautical Laboratory

Langley Air Force Base (Va.). Langley Aeronautical Laboratory

Langley Memorial Aeronautical Laboratory

United States. Langley Aeronautical Laboratory

United States. Langley Aeronautical Laboratory, Hampton, Va.

United States. Langley Memorial Aeronautical Laboratory

United States. National Advisory Committee for Aeronautics. Langley Aeronautical Laboratory

USA National Advisory Committee for Aeronautics Langley Memorial Aeronautical Laboratory

Languages
English (76)