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  • 1
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    Structural dynamics research in a full-scale transport aircraft crash test (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A remotely piloted air-to-ground crash test of a full-scale transport aircraft was conducted for the first time for two purposes: (1) to demonstrate performance of an antimisting fuel additive in suppressing fire in a crash environment, and (2) to obtain structural dynamics data under crash conditions for comparison with analytical predictions. The test, called the Controlled Impact Demonstration (CID), was sponsored by FAA and NASA with cooperation of industry, the Department of Defense, and the British and French governments. The test aircraft was a Boeing 720 jet transport. The aircraft impacted a dry lakebed at Edwards Air Force Base, CA. The purpose of this paper is to discuss the structural aspects of the CID. The fuselage section tests and the CID itself are described. Structural response data from these tests are presented and discussed. Nonlinear analytical modeling efforts are described, and comparisons between analytical results and experimental results are presented.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Format: text
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  • 2
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    Static load-carrying capacity of circular rigid-plastic plates under Gaussian distribution of pressure (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: STRUCTURAL MECHANICS
    Type: International Journal of Solids and Structures; 12; 8, 19; 1976
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  • 3
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    Do elliptical galaxies have thick disks? (1990)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The authors discuss new evidence which supports the existence of thick disks in elliptical/SO galaxies. Numerical simulations of weak interactions with thick disk systems produce shell structures very similar in appearance to those observed in many shell galaxies. The authors think this model presents a more plausible explanation for the formation of shell structures in elliptical/SO galaxies than does the merger model and, if correct, supports the existence of thick disks in elliptical/SO galaxies.
    Keywords: ASTROPHYSICS
    Type: NASA, Marshall Space Flight Center, Paired and Interacting Galaxies: International Astronomical Union Colloquium No. 124; p 755-758
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    General aviation crash safety program at Langley Research Center (1976)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The purpose of the crash safety program is to support development of the technology to define and demonstrate new structural concepts for improved crash safety and occupant survivability in general aviation aircraft. The program involves three basic areas of research: full-scale crash simulation testing, nonlinear structural analyses necessary to predict failure modes and collapse mechanisms of the vehicle, and evaluation of energy absorption concepts for specific component design. Both analytical and experimental methods are being used to develop expertise in these areas. Analyses include both simplified procedures for estimating energy absorption capabilities and more complex computer programs for analysis of general airframe response. Full-scale tests of typical structures as well as tests on structural components are being used to verify the analyses and to demonstrate improved design concepts.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: Aircraft Safety and Operating Problems; p 369-390
    Format: application/pdf
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  • 5
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    NASA/FAA general aviation crash dynamics program (1981)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The program involves controlled full scale crash testing, nonlinear structural analyses to predict large deflection elastoplastic response, and load attenuating concepts for use in improved seat and subfloor structure. Both analytical and experimental methods are used to develop expertise in these areas. Analyses include simplified procedures for estimating energy dissipating capabilities and comprehensive computerized procedures for predicting airframe response. These analyses are developed to provide designers with methods for predicting accelerations, loads, and displacements on collapsing structure. Tests on typical full scale aircraft and on full and subscale structural components are performed to verify the analyses and to demonstrate load attenuating concepts. A special apparatus was built to test emergency locator transmitters when attached to representative aircraft structure. The apparatus is shown to provide a good simulation of the longitudinal crash pulse observed in full scale aircraft crash tests.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: The 1980 Aircraft Safety and Operating Probl., Pt. 2; p 511-540
    Format: application/pdf
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  • 6
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    Theoretical study of camber flutter characteristics of monocoque and multiweb wings (1962)
    In:  CASI
    Details
    Publication Date: 2019-05-21
    Description: Camber flutter characteristics of monocoque and multiweb wings subjected to supersonic flow
    Keywords: AUXILIARY SYSTEMS
    Type: NASA-TR-R-150
    Format: application/pdf
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  • 7
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    Effect of Target Material Yield Strength on Hypervelocity Perforation and Ballistic Limit (1964)
    In:  CASI
    Details
    Publication Date: 2019-05-30
    Description: Viscoplastic flow theory in hypervelocity projectile perforation analyses of thin plates
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-X-54874
    Format: application/pdf
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  • 8
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    Analysis of hypervelocity perforation of a visco-plastic solid including the effects of target-material yield strength (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Hypervelocity perforation of viscoplastic solid - effects of target material yield strength
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TR-R-221
    Format: application/pdf
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  • 9
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    Survey of NASA research on crash dynamics (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Ten years of structural crash dynamics research activities conducted on general aviation aircraft by the National Aeronautics and Space Administration (NASA) are described. Thirty-two full-scale crash tests were performed at Langley Research Center, and pertinent data on airframe and seat behavior were obtained. Concurrent with the experimental program, analytical methods were developed to help predict structural behavior during impact. The effects of flight parameters at impact on cabin deceleration pulses at the seat/occupant interface, experimental and analytical correlation of data on load-limiting subfloor and seat configurations, airplane section test results for computer modeling validation, and data from emergency-locator-transmitter (ELT) investigations to determine probable cause of false alarms and nonactivations are assessed. Computer programs which provide designers with analytical methods for predicting accelerations, velocities, and displacements of collapsing structures are also discussed.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TP-2298 , L-15757 , NAS 1.60:2298
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  • 10
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    Plastic and Large-Deflection Analysis of Nonlinear Structures (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Plastic and Large Deflection Analysis of Nonlinear Structures (PLANS) system is collection of five computer programs for finite-element static-plastic and large deflection analysis of variety of nonlinear structures. System considers bending and membrane stresses, general three-dimensional bodies, and laminated composites.
    Keywords: MECHANICS
    Type: LAR-12816 , NASA Tech Briefs (ISSN 0145-319X); 6; 3; P. 314
    Format: text
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