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  • COMPOSITE MATERIALS  (3)
  • ENVIRONMENT POLLUTION  (3)
  • Analytical Chemistry and Spectroscopy
  • ELECTRONICS AND ELECTRICAL ENGINEERING
  • 1975-1979  (8)
  • 1
    Electronic Resource
    Electronic Resource
    On the formation of artefact peaks in linked scans of the magnet and electric sector fields in a mass spectrometer (1977)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 12 (1977), S. 735-738 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The apperrance of peaks at non-integral masses in linked scans, where the ratio B/E is kept constant, is shown to be caused by fragmentations of metastable ions occuring in the region between the magnetic and electric sectors. A formula is given for calculating the mass of the parent metastable ion and that of its daughter ion.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210121206
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Waste heat management and regulatory problems (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA, Washington Proc. of the Conf. on Waste Heat Management and Util., volume 1; 11 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Atmospheric spray-canal cooling systems for large electric power plants (1977)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA, Washington Proc. of the Conf. on Waste Heat Management and Utilization, Vol. 2,; 41 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Dispersion of heat and humidity from atmospheric spray-cooling systems (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA, Washington Proc. of the Conf. on Waste Heat Management and Utilization, Vol. 2,; 41 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Effect of preload on the fatigue and static strength of composite laminates with defects (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The effect of a preload cycle on the structural performance of three graphite/epoxy composite laminates was studied. The layups studied were a laminate typical of general purpose structures (L1), a laminate representative of a filament wound tank (L2), and a laminate representative of turboengine fan blades. The effects of three sizes of simulated initial defects were studied. The tests developed static strength data, fatigue to failure data, and residual static data after application of a predetermined number of fatigue cycles. For L1 specimens, there was a slight trend for the static strength to be greater for preloaded specimens. After application of cyclic loading, however, the influence of preloading was insignificant. In L2 and L3 specimens there was no consistent difference in the static or fatigue results between preloaded and nonpreloaded specimens.
    Keywords: COMPOSITE MATERIALS
    Type: Annual Meeting on Recent advances in engineering science; Nov 14, 1977 - Nov 16, 1977; Bethlehem, PA
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Evaluation of flawed composite structure under static and cyclic loading (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper presents the results of a program investigating the effects of initial defects on the fatigue and fracture response of composite laminates. The structural laminates investigated were a typical angle-ply laminate, a polar/hoop-wound pressure vessel laminate, and a typical engine fan blade laminate. Defects investigated were full- and half-penetration circular holes, full- and half-penetration slits, and countersink holes. Results are presented showing the effects of the defect size and type on the static fracture strength, fatigue performance, and residual static strength. The results of inspection procedures are shown, describing the effect of cyclic and static loadings on damage propagation in composite laminates. The data in this study were used to define proof test levels as a qualification procedure in composite structure subjected to cyclic loading.
    Keywords: COMPOSITE MATERIALS
    Type: Symposium on Fatigue of filamentary composite materials; Nov 15, 1976 - Nov 16, 1976; Denver, CO
    Format: text
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  • 7
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    Evaluation of flawed composite structural components under static and cyclic loading (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The effects of initial defects on the fatigue and fracture response of graphite-epoxy composite laminates are presented. The structural laminates investigated were a typical angle ply laminate, a polar/hoop wound pressure vessel laminate, and a typical engine fan blade laminate. Defects investigated were full and half penetration circular holes, full and half penetration slits, and countersink holes. The effects of the defect size and type on the static fracture strength, fatigue performance, and residual static strength are shown as well as the results of loadings on damage propagation in composite laminates. The data obtained were used to define proof test levels as a qualification procedure in composite structure subjected to cyclic loading.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-CR-135403
    Format: application/pdf
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  • 8
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    Electrostatic forces for personnel restraints (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The feasibility of utilizing electrostatic forces for personnel retention devices on exterior spacecraft surfaces was analyzed. The investigation covered: (1) determination of the state of the art; (2) analysis of potential adhesion surfaces; (3) safety considerations for personnel; (4) electromagnetic force field determination and its effect on spacecraft instrumentation; and (5) proposed advances to current technology based on documentation review, analyses, and experimental test data.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA-CR-151473 , MA-183TF
    Format: application/pdf
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