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  • 1
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    Unknown
    The Elastic Constants for Wrought Aluminum Alloys (1945)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: There are several constants which have been devised as numerical representations of the behavior of metals under the action of loadings which stress the metal within the range of elastic action. Some of these constants, such as Young's modulus of elasticity in tension and compression, shearing modulus of elasticity, and Poisson's ratio, are regularly used in engineering calculations. Precise tests and experience indicate that these elastic constants are practically unaffected by many of the factors which influence the other mechanical properties of materials and that a few careful determinations under properly controlled conditions are more useful and reliable than many determinations made under less favorable conditions. It is the purpose of this paper to outline the methods employed by the Aluminum Research Laboratories for the determination of some of these elastic constants, to list the values that have been determined for some of the wrought aluminum alloys, and to indicate the variations in the values that may be expected for some of the commercial products of these alloys.
    Type: NACA-TN-966
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    The Compressive Yield Strength of Extruded Shapes of 24st Aluminum Alloy (1941)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Type: NACA-TN-793
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Design of Tools for Press-countersinking or Dimpling 0.040-inch-thick-24S-T Sheet (1942)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A set of dimpling tools was designed for 0.040-inch 24S-T sheet and flush-type rivets 1/8 inch in diameter with 100 degree countersunk heads. The dimples produced under different conditions of pressure, sheet thickness, and drill diameter are presented as cross-sectional photographs magnified 20 times. The most satisfactory values for the dimpling tools were found to be: maximum punch diameter, 0.231 inch; maximum die diameter, 0.223 inch; maximum mandrel diameter, 0.128 inch; dimple angle, 100 degree; punch springback angle, 1 1/2 degree; and die springback angle, 2 degree.
    Type: NACA-TN-854
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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