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Effect of Rivet Holes on the Ultimate Strength Developed by 24S-T and Alclad 75S-T Sheet in Incomplete Diagonal Tension

Description: Strength tests were made of a number of 24S-T and Alclad 75S-T aluminum-alloy shear webs to determine the effect of rivet or bolt holes on the shear strength. Data were obtained for webs which approached a condition of pure shear stress as well as for webs with well-developed diagonal tension. The rivet factor, (pitch minus diameter) divided by pitch, was varied from approximately 0.81 to 0.62. These tests indicated that the shear stresses on the gross section were nearly constant for all values of the rivet factor investigated if the other properties of the web were not changed.
Date: 1943
Creator: Levin, L. Ross & Nelson, David H.
Partner: UNT Libraries Government Documents Department

Some Investigations of the General Instability of Stiffened Metal Cylinders 6: Stiffened Metal Cylinders Subjected to Combined Bending and Transverse Shear

Description: "This is the sixth of a series of reports covering an investigation of the general instability problem by the California Institute of Technology. This report and the succeeding reports of this series cover the work done on other loading conditions under the sponsorship of the National Advisory Committee for Aeronautics. This report summarizes the work that has been carried on in the experimental investigation of the problem of general instability of stiffened metal cylinders subjected to combined bending and transverse shear at the C.I.T." (p. 1).
Date: September 1943
Partner: UNT Libraries Government Documents Department

Tests of Ring-Stiffened Circular Cylinders Subjected to a Transverse Shear Load

Description: "Thirty-four circular cylinders stiffened by heavy rings were loaded to failure in combined bending and shear with a transverse shear load. The results are presented in the form of an interaction curve which is applicable to the design of ring-stiffened cylinders that fail as a result of local buckling" (p. 1).
Date: September 1958
Creator: Peterson, James P. & Updegraff, Richard G.
Partner: UNT Libraries Government Documents Department

The Shear of Aluminum Alloy Driven Rivets as Affected by Increasing D/T Ratios

Description: "A decrease in shear strengths for increasing D/t ratios was shown in a previous investigation of protruding-head aluminum alloy rivets in double shear conducted at Aluminum Research Laboratories in 1942. Since single shear joints are more common than double shear joints, it was desirable to extend the investigation to single shear joints. This reports describes the results of this investigation of single shear joints and also includes the results of the previous investigation on double shear joints" (p. 1).
Date: July 1944
Creator: Hartman, E. C. & Wescoat, C.
Partner: UNT Libraries Government Documents Department

The Critical Shear Load of Rectangular Plates

Description: This report gives formulas for analyzing the critical shear load of a simply supported square, isotropic (simple flat plate), or orthogonal anisotropic plate (a plate in which the rigidity in two directions perpendicular to each other is different, i.e. plywood or corrugated sheet), these formulas, although arrived at by approximation method, seem to agree fairly well with experimental results.
Date: April 1933
Creator: Seydel, Edgar
Partner: UNT Libraries Government Documents Department

The Strength and Stiffness of Shear Webs With and Without Lightening Holes

Description: Report presenting the results of nearly 200 tests 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. Results regarding the strength of the shear webs, stiffness of shear webs, and permanent-set tests are provided.
Date: June 1942
Creator: Kuhn, Paul
Partner: UNT Libraries Government Documents Department

The effect of the type of specimen on the shear strengths of driven rivets

Description: Report presenting tests of various types of riveted joint composed of 24S-T sheet and 1/8-inch A17S-T rivets in order to determine the effects of specimen type on shear strengths. The results indicated that there was only a slight variation in shear strength with considerable variation in the types of specimen.
Date: November 1943
Creator: Sharp, W. H.
Partner: UNT Libraries Government Documents Department

Influence of Shear Deformation of the Cross Section on Torsional Frequencies of Box Beams

Description: "An exact analysis has been carried out on the torsional vibrations of a four-flange box beam with cross sections which can change shape because the stiffness of the bulkheads is finite. The effect of shear deformation of the cross section on the torsional frequencies is illustrated by numerical calculations. An approximate method for quickly estimating the effects of bulkhead shear stiffness on the torsional frequencies of box beams has been devised" (p. 1).
Date: October 1955
Creator: Kruszewski, Edwin T. & Davenport, William W.
Partner: UNT Libraries Government Documents Department

Growth of Disturbances in a Flame-Generated Shear Region

Description: Results are presented of an experimental and theoretical investigation of the growth of transverse velocity disturbances in the shear region caused by a flame in a duct. In the theoretical stability analysis, a flow field arising from a flame in a duct was analyzed. The flow was neutrally stable to symmetric disturbances and unstable to antisymmetric ones. In the experimental part of the program disturbances of various frequencies were imposed on a flame stabilized in a duct, and the effects were measured by shadow photography and photomultiplier-probe surveys.
Date: October 14, 1957
Creator: Blackshear, Perry L., Jr.
Partner: UNT Libraries Government Documents Department

The Strength and Stiffness of Shear Webs With Round Lightening Holes Having 45 Degree Flanges

Description: Report presenting tests 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.
Date: December 1942
Creator: Kuhn, Paul
Partner: UNT Libraries Government Documents Department

Analysis of Deep Rectangular Shear Web Above Buckling Load

Description: From Introduction: "An analysis of a square web above the buckling load was presented in reference 1. The analysis of reference 1 therefore was repeated for a shear web with depth/width = 2.5. Comparison of the results with those for the square web then would indicate the effect in the depth-width ratio."
Date: March 1946
Creator: Levy, Samuel; Woolley, Ruth M. & Corrick, Josephine N.
Partner: UNT Libraries Government Documents Department

Shear Stress Distribution Along Glue Line Between Skin and Cap-Strip of an Aircraft Wing

Description: Note presenting an experimental determination of the distribution of shear stress in a plane parallel to and a short distance from the fastening between the outer and intermediate laminations on a wing and of the effect upon the distribution of change the length and width of the specimen.
Date: July 1950
Creator: Norris, Charles Brazer & Ringelstetter, L. A.
Partner: UNT Libraries Government Documents Department

Critical stress for an infinitely long flat plate with elastically restrained edges under combined shear and direct stress

Description: "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" (p. 1).
Date: November 1943
Creator: Stowell, Elbridge Z. & Schwartz, Edward B.
Partner: UNT Libraries Government Documents Department

An empirical formula for the critical shear stress of curved sheets

Description: Report presenting tests to determine the critical shear stress of curved sheets. The empirical formula derived from the tests is applicable to panels with a ratio of radius to thickness of 300 or greater, a central angle of 1 radian or less, and a ratio of arc length to axial length not greater than 1.
Date: January 1945
Creator: Kuhn, Paul & Levin, L. Ross
Partner: UNT Libraries Government Documents Department

The Influence of the Form of a Wooden Beam on Its Stiffness and Strength 1: Deflection of Beams With Special Reference to Shear Deformations

Description: The purpose of this investigation was to determine to what extent ordinary deflection formulas, which neglect shear deformations, are in error when applied to beams of various sections, and to develop reasonably accurate yet comparatively simple formulas which take into account such deformations. A great many tests were made to determine the amount of shear deformation for beams of various sections tested over many different spans. As the span over which the beam is tested is increased the error introduced by neglecting shear deformations becomes less, and the values obtained by substituting measured deflections in the ordinary formulas approach more nearly the modulus of elasticity in tension and compression.
Date: 1924
Creator: Newlin, J. A. & Trayer, G. W.
Partner: UNT Libraries Government Documents Department

Results of Shear Fatigue Tests of Joints With 3/16-Inch-Diameter 24S-T31 Rivets in 0.064-Inch-Thick Alclad Sheet

Description: Note presenting shear fatigue tests of joints with rivets in Alclad sheet of several high-strength aluminum alloys. The results showed that the design of the joint gives a wider range of fatigue strengths than does the choice of material from the group studied. No one sheet alloy showed superiority over the others.
Date: February 1950
Creator: Holt, Marshall
Partner: UNT Libraries Government Documents Department

Shear Elastic Properties of Some High Strength Nonferrous Metals as Affected by Plastic Deformation and by Heat Treatment

Description: Note presenting a study of the shear elastic properties of monel, nickel, Inconel, and aluminum-model tubing, as influenced by extension of annealed specimens, by cold reduction during manufacture, and by stress-relief annealing of cold-reduced materials. With slight extension of annealed tubing, the shear proof stresses generally decrease, owing to induced internal stress.
Date: January 1945
Creator: Mebs, R. W. & McAdam, D. J., Jr.
Partner: UNT Libraries Government Documents Department

Local Isotropy in Turbulent Shear Flow

Description: "The mean strain rate in turbulent shear flow must tend to make the structure anisotropic in all parts of the spectrum. It is argued here, however, that if the spectral energy transfer process destroys orientation, the Kolmogoroff notion of local isotropy can still be justified in spectral regions where the local transfer time is shorter than the characteristics time of the gross shear strain" (p. 1).
Date: May 28, 1958
Creator: Corrsin, Stanley
Partner: UNT Libraries Government Documents Department

A Method of Shear-Lag Analysis of Box Beams for Axial Stresses, Shear Stresses, and Shear Center

Description: Report presenting a practical and relatively rapid method of compensating for shear lag in box-beam analysis with accuracy sufficient for design purposes. Effectiveness curves for box beam elements are derived for an ideal, symmetrical structure. Tabular computation forms for rapid, accurate calculations of axial stresses, shear center, and shear stresses for beam with shear lag are induced.
Date: April 1942
Creator: Erlandsen, Oscar, Jr. & Mead, Lawrence M., Jr.
Partner: UNT Libraries Government Documents Department

Critical Shear Stress of a Curved Rectangular Panel With a Central Stiffener

Description: "A theoretical solution is given for the critical shear stress of a simply supported curved rectangular plate stiffened by a central stiffener offering no torsional restraint which lies in either the axial or circumferential direction. Results are obtained by means of the Galerkin method and are presented in the form of computed curves and tables" (p. 1).
Date: October 1949
Creator: Stein, Manuel & Yaeger, David J.
Partner: UNT Libraries Government Documents Department

Strength in Shear of the Thin Curved Sheets of Alclad

Description: "This note is on an investigation made to obtain information on the strength of thin curved sheets of Alclad in shear. Designers may utilize this material as a strength member as well as for a covering for the wings and fuselages. A reduction may then be made in the size of the internal strength members. These experiments were undertaken with the object of securing the maximum value from the metal in this respect" (p. 1).
Date: June 1930
Creator: Smith, George Michael
Partner: UNT Libraries Government Documents Department

Spectrums and diffusion in a round turbulent jet

Description: "In a round turbulent jet at room temperature, measurement of the shear correlation coefficient as a function of frequency (through bandpass filters) has given a rather direct verification of Kolmogoroff's local-isotropy hypothesis. One-dimensional power spectrums of velocity and temperature fluctuations, measured in unheated and heated jets, respectively, have been contrasted. Under the same conditions, the two corresponding transverse correlation functions have been measured and compared" (p. 1).
Date: July 1950
Creator: Corrsin, Stanley & Uberoi, Mahinder S.
Partner: UNT Libraries Government Documents Department

Ultimate stresses developed by 24S-T and Alclad 75S-T aluminum-alloy sheet in incomplete diagonal tension

Description: "Strength tests were made on 24S-T and Alclad 75S-T aluminum-alloy sheet in diagonal tension. These tests indicated that the ultimate shear stress was essentially independent of the rivet factor if the rivet factor was greater than 0.6, which covers most of the practical range. Curves showing the effect of diagonal tension on the ultimate shear stress in the gross section are presented. These curves supersede those given in NACA TN No. 1364" (p. 1).
Date: November 1948
Creator: Levin, L. Ross
Partner: UNT Libraries Government Documents Department

Strength Analysis of Stiffened Beam Webs

Description: Note presenting a method for strength analysis of stiffened shear webs, which has been revised and extended from a previous report. A set of formulas and graphs which cover all aspects of strength analysis is given, experimental data are presented, and the accuracy of the formulas as judged by comparison with the data is discussed.
Date: July 1947
Creator: Kuhn, Paul & Peterson, James P.
Partner: UNT Libraries Government Documents Department