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  • Other Sources  (4)
  • 1970-1974  (4)
Collection
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Year
  • 1
    facet.materialart.
    Unknown
    Fatigue flaw growth behavior in stiffened and unstiffened panels loaded in biaxial tension (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The effect was investigated of biaxial loading on the flaw growth rate of 2219-T87 aluminum alloy that would be typical of Space Shuttle cryogenic tankage design. The stress distribution and stress concentration factors for several integrally stiffened panels under various loading conditions were obtained. The flaw growth behavior of both stiffened and unstiffened panels under biaxial loading conditions was determined. The effect of a complex stress state was studied by introducing flaws in fillet areas of biaxially loaded stiffened panels.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-CR-128904 , MCR-73-61
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Firefighter's compressed air breathing system pressure vessel development program (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The research to design, fabricate, test, and deliver a pressure vessel for the main component in an improved high-performance firefighter's breathing system is reported. The principal physical and performance characteristics of the vessel which were required are: (1) maximum weight of 9.0 lb; (2) maximum operating pressure of 4500 psig (charge pressure of 4000 psig); (3) minimum contained volume of 280 in. 3; (4) proof pressure of 6750 psig; (5) minimum burst pressure of 9000 psig following operational and service life; and (6) a minimum service life of 15 years. The vessel developed to fulfill the requirements described was completely sucessful, i.e., every category of performence was satisfied. The average weight of the vessel was found to be about 8.3 lb, well below the 9.0 lb specification requirement.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-134384 , MCR-73-214
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Experimental study of pop-in behavior of surface flaw-type cracks Final report (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Growth behavior of surface-flaw type cracks in titanium alloys
    Keywords: MATERIALS, METALLIC
    Type: NASA-CR-108457
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Development and fracture mechanics data for 6Al-6V-2 Sn titanium alloy (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Fracture mechanics properties of 6Al-6V-2Sn titanium in the annealed, solution-treated, and aged condition are presented. Tensile, fracture toughness, cyclic flaw growth, and sustained-load threshold tests were conducted. Both surface flaw and compact tension-specimen geometries were employed. Temperatures and/or environments used were -65 F (220 K) air, ambient, 300 F (422 K) air, and room-temperature air containing 10 and 100% relative humidity.
    Keywords: MATERIALS, METALLIC
    Type: NASA-CR-134209 , MCR-74-43
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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