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  • STRUCTURAL MECHANICS  (7)
  • AIR TRANSPORTATION AND SAFETY  (6)
  • D. fracture  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The lattice stability of interfacial cracks
    Amsterdam : Elsevier
    Journal of Physics and Chemistry of Solids 55 (1994), S. 1165-1168 
    Details
    ISSN: 0022-3697
    Keywords: D. fracture ; D. mechanical properties
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-3697(94)90134-1
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    Paper (German National Licenses)
    Fulltext
  • 2
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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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    NASA TECHNICAL REPORTS
  • 3
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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
    Format: text
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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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    NASA TECHNICAL REPORTS
  • 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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    NASA TECHNICAL REPORTS
  • 6
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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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    NASA TECHNICAL REPORTS
  • 7
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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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    NASA TECHNICAL REPORTS
  • 8
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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
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Plastic behavior of circular plates under transverse impulse loadings of Gaussian distribution (1968)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Plastic response of circular uniform plate to axisymmetric impulse load of Gaussian distribution
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TR-R-279
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Simulation of aircraft crash and its validation (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: NASA Langley Research Center is engaged in an extensive research and development task aimed at providing the general aviation industry with reliable crashworthy airframe design technology. This paper describes the full-scale crash tests of general aviation airplanes being conducted to generate data on simulated crashes and to study the nonlinear dynamic behavior of aircraft structures. Analytical techniques under development for predicting nonlinear behavior of general airframe structures under crash-loading conditions are also described. Data are presented from the full-scale crash tests as well as comparison of analytical predictions with experimental results on some simplified structures.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: AIAA PAPER 75-271 , American Institute of Aeronautics and Astronautics, Annual Meeting and Technical Display; Feb 24, 1975 - Feb 26, 1975; Washington, DC
    Format: text
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    NASA TECHNICAL REPORTS
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