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  • AIR TRANSPORTATION AND SAFETY  (1)
  • Launch Vehicles and Launch Operations  (1)
  • 1
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    FAA/NASA International Symposium on Advanced Structural Integrity Methods for Airframe Durability and Damage Tolerance, part 2 (1994)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The international technical experts in the areas of durability and damage tolerance of metallic airframe structures were assembled to present and discuss recent research findings and the development of advanced design and analysis methods, structural concepts, and advanced materials. The principal focus of the symposium was on the dissemination of new knowledge and the peer-review of progress on the development of advanced methodologies. Papers were presented on the following topics: structural concepts for enhanced durability, damage tolerance, and maintainability; new metallic alloys and processing technology; fatigue crack initiation and small crack effects; fatigue crack growth models; fracture mechanics failure criteria for ductile materials; structural mechanics methodology for residual strength and life prediction; development of flight load spectra for design and testing; and corrosion resistance.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: NASA-CP-3274-PT-2 , L-17432-PT-2 , NAS 1.55:3274-PT-2 , May 04, 1994 - May 06, 1994; Hampton, VA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    NESC Peer-Review of the Flight Rationale for Expected Debris Report (2005)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: Since the loss of Columbia on February 1, 2003, the Space Shuttle Program (SSP) has significantly improved the understanding of launch and ascent debris, implemented hardware modifications to reduce debris, and conducted tests and analyses to understand the risks associated with expected debris. The STS-114 flight rationale for expected debris relies on a combination of all three of these factors. A number of design improvements have been implemented to reduce debris at the source. The External Tank (ET) thermal protection system (TPS) foam has been redesigned and/or process improvements have been implemented in the following locations: the bipod closeout, the first ten feet of the liquid hydrogen (LH2) tank protuberance air load (PAL) ramp, and the LH2 tank-to-intertank flange closeout. In addition, the forward bipod ramp has been eliminated and heaters have been installed on the bipod fittings and the liquid oxygen (LO2) feedline forward bellows to prevent ice formation. The Solid Rocket Booster (SRB) bolt catcher has been redesigned. The Orbiter reaction control system (RCS) thruster cover "butcher paper" has been replaced with a material that sheds at a low velocity. Finally, the pad area has been cleaned to reduce debris during lift-off.
    Keywords: Launch Vehicles and Launch Operations
    Type: NASA/TM-2005-213792/VERSION1.0 , NESC-RP-05-82/05-010-E/VERSION1.0 , L-19161/VERSION1.0
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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