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Standards and Metadata Requirements for Computerization of Selected Mechanical Properties of Metallic Materials

Description: Abstract: To assist in building a computerized information system on the engineering properties of materials, the standards and metadata requirements for a representative group of mechanical property categories are considered. These categories include: tensile behavior, hardness numbers, notch-bar impact test parameters, and fatigue properties. For each property group, definitions of terms, synonyms (and non-synonyms), standard test methods, standards for reporting data, precision and accuracy,… more
Date: August 1985
Creator: Westbrook, J. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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User's Guide for the Cone Calorimeter

Description: Abstract: This document provides instructions for users of the Cone Calorimeter in installing, operating, maintaining, and repairing the instrument. It is intended for training new operators at NBS and at other laboratories. The troubleshooting and repair sections will be a useful reference section even for experienced operators, since remedies for a large number of potential instrument malfunctions are outlined there.
Date: 1988
Creator: Twilley, William H. & Babrauskas, Vytenis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Environmental Speciation and Monitoring Needs for Trace Metal-Containing Substances from Energy-Related Processes

Description: Abstract: This book presents the Proceedings of the DoE/NBS Workshop on Environmental Speciation and Monitoring Needs for Trace Metal-Containing Substances from Energy-Related Processes held at the National Bureau of Standards, Gaithersburg, MD, on May 18-20, 1981. The Workshop was sponsored by the Office of Health and Environmental Research, DoE, and the Office of Recycled Materials, NBS. The volume contains refereed papers submitted by 24 invited speakers, along with substantially complete te… more
Date: November 1981
Creator: Brinckman, Frederick E. & Fish, Richard H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Science and Technology: the Challenges of the Future

Description: Preface: On its 80th anniversary, the National Bureau of Standards hosted a series of lectures by six distinguished speakers of national and international note who discussed the challenges facing science and technology and, thus, the Bureau in the coming years. This publication contains the texts of these presentations, along with transcripts of the question-and answer sessions following the presentations. The lecture series was organized by Dr. Donald R. Johnson of NBS with the very able assis… more
Date: May 1982
Creator: Johnson, Donald R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Report of the Sixty-Sixth National Conference on Weights and Measures, 1981

Description: Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.
Date: January 1982
Creator: United States. National Bureau of Standards.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Standards Committee Activities of the National Bureau of Standards: 1982 Highlights

Description: Abstract: This report summarizes NBS standards committee activities and accomplishments during, calendar year 1982. It describes the management of standards activities at NBS, profiles NBS staf* participation on outside standards committees, and highlights significant technical and individual contributions made by NBS staff. In 1982, 457 staff members (or 29% of NBS' professional, scientific, and technical staff) participated in 1,046 outside standards committees of 97 national and internationa… more
Date: March 1983
Creator: Newell, Karl G., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Contributions on the Mechanics of Boundary-Layer Transition

Description: "The manner in which flow in a boundary layer becomes turbulent was investigated on a flat plate at wind speeds generally below 100 feet per second. Hot-wire techniques were used, and many of the results are derived from oscillograms of velocity fluctuations in the transition region. Following a presentation of the more familiar aspects of transition, there are presented the very revealing facts discovered while studying the characteristics of artificially produced turbulent spots" (p. 853).
Date: February 28, 1955
Creator: Schubauer, G. B. & Klebanoff, P. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of craze and impact resistance in glazing plastics by multiaxial stretching

Description: The loss of strength of cast polymethyl methacrylate plastic as a result of crazing is of considerable importance to the aircraft industry. Because of the critical need for basic information on the nature of crazing and the effects of various treatments and environmental conditions on its incidence and magnitude, an investigation of this phenomenon was undertaken. The following factors were examined: (1) the effect of stress-solvent crazing on tensile strength of polymethyl methacrylate; (2) th… more
Date: December 28, 1955
Creator: Kline, G. M.; Wolock, I.; Axilrod, B. M.; Sherman, M. A.; George, D. A. & Cohen, V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characteristics of Turbulence in Boundary Layer with Zero Pressure Gradient

Description: "The results of an experimental investigation of a turbulent boundary layer with zero pressure gradient are presented. Measurements with the hot-wire anemometer were made of turbulent energy and turbulent shear stress, probability density and flattening factor of u-fluctuation (fluctuation in x-direction), spectra of turbulent energy and shear stress, and turbulent dissipation. The importance of the region near the wall and the inadequacy of the concept of local isotropy are demonstrated" (p. 1… more
Date: 1955
Creator: Klebanoff, P. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heat-Loss Characteristics of Hot-Wire Anemometers at Various Densities in Transonic and Supersonic Flow

Description: Note presenting an experimental investigation of the heat-loss characteristics of heated fine wires suitable for use as anemometers in turbulence research. The effects of each of the several variables on the heat-loss characteristics of both normally oriented and swept wires were measured. The temperature-loading effects were found to cause large sensitivity differences between constant-temperature and constant-current operation.
Date: May 1955
Creator: Spangenberg, W. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A New Method of Analyzing Extreme-Value Data

Description: Note presenting a method for analyzing extreme-value data which may arise in a wide variety of applications. Discussion of the method is preceded by the necessary statistical theory which also furnishes a basis for evaluating the new method in relation to existing ones. Several appendices are also included for mathematical developments not included in the text.
Date: January 1954
Creator: Lieblein, Julius
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermodynamic Properties of Gaseous Nitrogen

Description: Note presenting tables of thermal properties of molecular nitrogen that have been prepared in an NBS-NACA series and grouped together for convenient use. Some of the properties include the thermodynamic functions for the gas, both real and ideal, the transport properties for the gas, and the vapor pressure of the liquid and the solid.
Date: March 1956
Creator: Woolley, Harold W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Generalized Tables of Corrections to Thermodynamic Properties for Nonpolar Gases

Description: Note presenting tables based on the Lennard-Jones 6-12 potential for nonpolar molecules to be used in the representation of second and third virial coefficients and equation-of-state corrections for enthalpy, entropy, specific heats at constant volume and at constant pressure, the ratio of specific heats, the isentropic expansion coefficient, and the velocity of sound.
Date: March 1956
Creator: Woolley, Harold W. & Benedict, William S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Compressibility Factor, Density, Specific Heat, Enthalpy, Entropy, Free-Energy Function, Viscosity, and Thermal Conductivity of Steam

Description: Note presenting tables of thermal properties of stream that have been prepared in an NBS-NACA series. They include, for real gas, the compressibility factor, the density, the specific heat at constant pressure, the enthalpy, the entropy, the free-energy function, the viscosity, and the thermal conductivity.
Date: August 1956
Creator: Fano, Lilla; Hubbell, John H. & Beckett, Charles W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bending With Large Deflection of a Clamped Rectangular Plate With Length-Width Ratio of 1.5 Under Normal Pressure

Description: "The Von Karman equations for a thin flat plate with large deflections are solved for the special case of a plate with clamped edges having a ratio of length to width of 1.5 and loaded by uniform normal pressure. Center deflections, membrane stresses, and extreme-fiber bending stresses are given as a function of pressure for center deflections up to twice the thickness of the plate. For small deflections the results coincide with those obtained by Hencky from the linear theory" (p. 1).
Date: July 1942
Creator: Levy, Samuel & Greenman, Samuel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Adaptor for Measuring Principal Strains With Tuckerman Strain Gage

Description: Report discussing an adapter which uses three Tuckerman optical strain gages to measure the displacement of the three vortices of an equilateral triangle along lines 120 degrees apart. These displacements are substituted in well-known equations in order to compute the magnitude and direction of the principal strains. Tests of the adaptor indicate that principal strains over a gage length of 1.42 inch may be measured with a systematic error not exceeding 4 percent and a mean observational error … more
Date: June 1943
Creator: McPherson, A. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion of Magnesium Alloy ZK60A in Marine Atmosphere and Tidewater

Description: "The corrosion resistance of unprotected magnesium-zinc-zirconium alloy ZK60A was determined in a marine atmosphere and in tidewater. The unprotected alloy was so rapidly attacked in tidewater that it would be of no practical value in applications subject to wetting by sea water. In the marine atmosphere the rate of corrosion was much less and the alloy should give good service if adequately protected" (p. 1).
Date: February 1952
Creator: Reinhart, Fred M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Structure of Turbulence in Fully Developed Pipe Flow

Description: Note presenting measurements made with a hot-wire anemometer in fully developed turbulent flow in a 10-inch pipe at speeds of approximately 10 and 100 feet per second. Emphasis was placed on turbulence and conditions near the wall. Results regarding the mean-energy balance, turbulent-energy balance, energy-spectrum considerations, and some general considerations are provided.
Date: June 1953
Creator: Laufer, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calculation and Measurement of Normal Modes of Vibration of an Aluminum-Alloy Box Beam With and Without Large Discontinuities

Description: Note presenting calculations of the lowest normal modes of vibration of three aluminum-alloy box beams using a matrix iteration method. An experimental confirmation of the theory is also carried out and includes a determination of natural frequencies and determination of normalized mode shapes are provided.
Date: January 1953
Creator: Smith, Frank C. & Howard, Darnley M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of Sandwich Construction Under Lateral and Axial Loads

Description: Note presenting testing under combined axial load and lateral pressure on 12 bonded sandwich panels with simply supported loaded edges and free unloaded edges. The maximum load and mode of failure were observed for all the panels. Lateral deflections and axial strains were also measured.
Date: December 1953
Creator: Kroll, Wilhelmina D.; Mordfin, Leonard & Garland, William A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cumulative Fatigue Damage of Axially Loaded Alclad 75S-T6 and Alclad 24S-T3 Aluminum-Alloy Sheet

Description: Note presenting the results of cumulative-fatigue-damage tests made on 607 specimens machined from alclad 75S-T6 aluminum-alloy sheet 0.064 inch thick and 198 specimens of alclad 24S-T3 and alclad 75S-T6 aluminum-alloy sheet 0.032 inch thick. The cumulative-damage ratio was calculated as the sum of the ratios of the numbers of cycles applied at the different stress levels to the number of cycles at the same stress level that would cause failure.
Date: September 1955
Creator: Smith, Ira; Howard, Darnley M. & Smith, Frank C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Creep and Creep-Rupture Characteristics of Some Riveted and Spot-Welded Lap Joints of Aircraft Materials

Description: Note presenting a description of equipment and test technique used in the creep testing of lap joints. Riveted aluminum-alloy joints fabricated from 75S-T6 and 24S-T3 sheet with 24S and 24S-T31 rivets were tested at 300, 400, and 500 degrees Fahrenheit. The test results showed that the creep of the riveted joints is considerably greater than the creep of the unriveted sheet although not so large that the creep of the sheet is negligible compared with that of the joints.
Date: June 1955
Creator: Mordfin, Leonard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Normal Pressure on Strength of Axially Loaded Sheet-Stringer Panels

Description: Note presenting tests under combined axial load and normal pressure on 29 24S-T aluminum alloy sheet-stringer panels. Empirical formulas were derived for predicting the effect of normal pressure on the strain for buckling of sheet between stringers. Results of buckling, sheet load, strains, buckling, and failure are provided.
Date: July 1946
Creator: McPherson, A. E.; Levy, Samuel & Zibritosky, George
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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