44 Matching Results

Search Results

Results: 1 - 24 next
open access

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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Effect of Surface Finish on the Fatigue Performance of Certain Propeller Materials

Description: Report presenting an investigation of the effect of various surface finishes on the endurance of normalized X4130 and 4140 steels and 25S-T aluminum alloy. All mechanically formed surfaces tested were stronger than electropolished surfaces.
Date: December 1943
Creator: Russell, H. W.; Gillett, H. W.; Jackson, L. R. & Foley, G. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Stability of Isotropic or Orthotopic Cylinders or Flat or Curved Panels, Between and Across Stiffeners, With Any Edge Conditions Between Hinged and Fixed, Under Any Combination of Compression and Shear

Description: Note presenting a theory that is meant to include all factors that are commonly present when determining the stability of isotropic or orthotropic cylinders or flat or curved panels under a variety of characteristics. The theory is based on the energy method and involves a number of approximations, some rather rough. It is a theory of elastic stability and, like other theories, assumes a construction with no imperfections of shape or elasticity.
Date: December 1943
Creator: Donnell, L. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Subpress for Compressive Tests

Description: "A subpress for compressive tests is described. The subpress was designed primarily for use in developing and investigating methods for testing thin sheet metal in compression. Provision was made for testing fixed-end and flat-end specimens with or without various types of lateral support against buckling. Compressive stress-strain data for a sheet of 0.032-inch 24S-RT aluminum alloy were obtained with the subpress by the pack method and by the single-thickness method" (p. 1).
Date: December 1943
Creator: Aitchison, C. S. & Miller, James A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tensile and Compressive Tests of Magnesium Alloy J-1 Sheet

Description: Note presenting tensile and compressive stress-strain curves, stress-deviation curves, and secant modulus-stress curves for longitudinal and transverse specimens of magnesium alloy J-1 sheets 0.032 and 0.102 inch thick. Significant differences were found between the tensile and compressive stress-strain curves and between the compressive stress-strain curves for the longitudinal and transverse questions.
Date: December 1943
Creator: Aitchison, C. S. & Miller, James A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The effect of inlet-valve design, size, and lift on the air capacity and output of a four-stroke engine

Description: Report presenting a series of performance tests made with a CFR engine at constant inlet pressure and temperature and constant exhaust pressure. Special cylinder heads with different sizes and designs of inlet valve and port were used.
Date: November 1943
Creator: Livengood, James C. & Stanitz, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Part-Throttle Operation and Control of a Piston-Ported Two-Stroke Cylinder

Description: Report presenting a study of a single-cylinder piston-ported two-stroke engine in order to investigate means of obtaining reliable operation under idling conditions. The fuel-consumption characteristics were also studied over the useful range of speeds and loads. Results regarding illuminating gas, vaporized gasoline, gasoline injection, injected safety fuel, and brake specific fuel consumption are provided.
Date: November 1943
Creator: Rogowski, A. R. & Taylor, C. Fayette
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Investigations of the General Instability of Stiffened Metal Cylinders 7: Stiffened Metal Cylinders Subjected to Combined Bending and Torsion

Description: "This report summarizes the work that has been carried on in the experimental investigation of the problem of the general instability of stiffened metal cylinders subjected to combined bending and torsion at the C.I.T. This part of the investigation included tests on 26 sheet-covered specimens. An interaction curve for the case of combined bending and torsion is presented. The results of tests of 17 specimens subjected to pure torsion are also given" (p. 1).
Date: November 1943
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Certain Mechanical Strength Properties of Aluminum Alloys 25S-T and X76S-T

Description: Note presenting tests made to determine certain mechanical strength properties of 25S-T aluminum alloy. Results are presented from static tests in tension and torsion, bending fatigue tests employing three different types of testing machines, and from impact tests of notched and unnotched specimens in tension as well as Charpy impact tests made at several low temperatures. These are made in order to study the stresses that propeller blades experience.
Date: October 1943
Creator: Dolan, Thomas J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Requirements for Auxiliary Stiffeners Attached to Panels Under Combined Compression and Shear

Description: "Panels of aluminum alloy sheets, framed by side and end stiffeners, were subjected to combined loading by means of offset knife edges applying loads to top and bottom end plates with reacting forces against the end plates supplied by laterally acting rollers. The test specimens were 17S-T aluminum alloy shoots 0.040 inch thick in panels of 10-inch width and three different lengths (approximately 10, 26, and 30 inch). Data were obtained for the bowing of transverse and longitudinal ribs of rect… more
Date: September 16, 1943
Creator: Scott, Merit & Weber, Robert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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 combin… more
Date: September 1943
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Strength of Thin-Wall Cylinders of D Cross Section in Combined Pure Bending and Torsion

Description: "The results of tests of 56 cylinders of D cross section conducted in the Aeronautical Laboratory of the University of Maryland are presented in this report. These cylinders were subjected to pure bending and torsional moments of varying proportions to give the strength under combined loading conditions. The average buckling stress of these cylinders has been related to that of circumscribing circular cylinders for conditions of pure torsion and pure bending and the equation of the interaction … more
Date: September 1943
Creator: Sherwood, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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… more
Date: August 1943
Creator: Moore, R. L. & Wescoat, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A method for determining the column curve from tests of columns with equal restraints against rotation on the ends

Description: The results are presented of a theoretical study for the determination of the column curve from tests of column specimens having ends equally restrained against rotation. The theory of this problem is studied and a curve is shown relating the fixity coefficient c to the critical load, the length of the column, and the magnitude of the elastic restraint. A method of using this curve for the determination of the column curve for columns with pin ends from tests of columns with elastically restrai… more
Date: August 1943
Creator: Lundquist, Eugene E.; Rossman, Carl A. & Houbolt, John C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Investigations of the General Instability of Stiffened Metal Cylinders 3: Continuation of Tests of Wire-Braced Specimens and Preliminary Tests of Sheet-Covered Specimens

Description: "This is the third of a series of reports covering an investigation of the general instability problem by the California Institute of Technology. The first five reports of this series cover investigations of the general instability problem under the loading conditions of pure bending and were prepared under the sponsorship of the Civil Aeronautics Administration. The succeeding reports of this series cover the work done on other loading conditions under the sponsorship of the National Advisory … more
Date: August 1943
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Investigations of the General Instability of Stiffened Metal Cylinders 4: Continuation of Tests of Sheet-Covered Specimens and Studies of the Buckling Phenomena of Unstiffened Circular Cylinders

Description: "This is the fourth of a series of reports covering an investigation of the general instability problem by the California Institute of Technology. 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 is to deal primarily with the continuation of tests of sheet-covered specimens and studies of the buckling phenomena of unstiffened circular cylinders" (p. 1).
Date: August 1943
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Investigations of the General Instability of Stiffened Metal Cylinders 5: Stiffened Metal Cylinders Subjected to Pure Bending

Description: 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 pure bending at the C.I.T. This part of the investigation included tests of 46 sheet-covered specimens. The most significant result was the determination of a new design parameter for the case of a stiffened metal cylinder subjected to pure bending.
Date: August 1943
Creator: Hoff, N. J.; Boley, Bruno A. & Nardo, S. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Column Strength of Magnesium Alloy AM-57S

Description: Tests were made to determine the column strength of extruded magnesium alloy AM-57S. Column specimens were tested with round ends and with flat ends. It was found that the compressive properties should be used in computations for column strengths rather than the tensile properties because the compressive yield strength was approximately one-half the tensile yield strength. A formula for the column strength of magnesium alloy AM-57S is given.
Date: July 1943
Creator: Holt, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Description of Stress-Strain Curves by Three Parameters

Description: "A simple formula is suggested for describing the stress-strain curve in terms of three parameters; namely, Young's modulus and two secant yield strengths. Dimensionless charts are derived from this formula for determining the stress-strain curve, the tangent modulus, and the reduced modulus of a material for which these three parameters are given. Comparison with the tensile and compressive data on aluminum-alloy, stainless-steel, and carbon-steel sheet in NACA Technical Note No. 840 indicates… more
Date: July 1943
Creator: Ramberg, Walter & Osgood, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Rivet Pitch Upon the Fatigue Strength of Single-Row Riveted Joints of 0.025- to 0.025-Inch 24S-T Alclad

Description: "S-N curves at the range ratio of 0.2 were experimentally obtained for each of the following values of rivet pitch P as used in a single-row lap joint of 0.025- to 0.025-inch 24S-T alclad with one-eight AN430 round-head rivets: p=0.5, 0.75, 1.0, 1.5. Families of constant rivet pitch curves, which define the fatigue life for specimens studied, were developed. Curves showing the variation of the effective stress concentration factor in fatigue with rivet pitch and maximum load per rivet were also… more
Date: July 1943
Creator: Seliger, Victor
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Round Heat-Treated Chromium-Molybdenum-Steel Tubing Under Combined Loads

Description: "The results of tests of round heat-treated chromium-molybdenum-steel tubing are presented. Tests were made on tubing under axial load, bending load, torsional load, combined bending and axial load, combined bending and torsional load, and combined axial, bending, and torsional load. Tensile and compressive tests were made to determine the properties of the material. Formulas are given for the evaluation of the maximum strength of this steel tubing under individual or combined loads" (p. 1).
Date: July 1943
Creator: Osgood, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Investigations of the General Instability of Stiffened Metal Cylinders 1: Review of Theory and Bibliography

Description: This is the first of a series of reports covering an investigation of the general instability problem. This report consists of earlier reports along with the results of the current studies in the form of a series of reports covering the entire investigation.
Date: July 1943
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Investigations of the General Instability of Stiffened Metal Cylinders 2: Preliminary Tests of Wire-Braced Specimens and Theoretical Studies

Description: "This is the second of a series of reports covering an investigation of the general instability problem by the California Institute of Technology. The first five reports of this series cover investigations of the general instability problem under the loading conditions of pure bending and were prepared under the sponsorship of the Civil Aeronautics Administration. The succeeding reports of this series cover the work done on other loading conditions under the sponsorship of the National Advisory… more
Date: July 1943
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen