An assessment is presented of ten composite tail rotor spars and four horizontal stabilizers exposed to the effects of in-flight commercial service for up to nine years to establish realistic environmental factors for use in future designs. This evaluation is supported by test results of helicopter components and panels which have been exposed to outdoor environmental effects since 1979. Full scale static and fatigue tests were conducted on graphite/epoxy and Kevlar/epoxy composite components removed from Sikorsky Model S-76 helicopters in commercial operations off the Gulf Coast of Louisiana. Small scale static and fatigue tests were conducted on coupons obtained from panels exposed to outdoor conditions in Stratford, CT and West Palm Beach, Florida. The panel materials and ply configurations were representative of the S-76 components. The results are discussed of moisture analyses and strength tests on both the S-76 components and composite panels after up to nine years of outdoor exposure. Full scale tests performed on the helicopter components did not disclose any significant reductions from the baseline strengths. The results increased confidence in the long term durability of advanced composite materials in helicopter structural applications.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Flight Service Evaluation of Composite Helicopter Components


    Beteiligte:
    G. H. Mardoian (Autor:in) / M. B. Ezzo (Autor:in)

    Erscheinungsdatum :

    1990


    Format / Umfang :

    142 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Flight service evaluation of composite helicopter components

    Mardoian, George H. / Ezzo, Maureen B. | NTRS | 1994



    Flight service evaluation of composite helicopter components

    Mardoian, G. H. / Ezzo, M. B. | NTRS | 1986


    Flight service evaluation of composite helicopter components

    Mardoian, G.H. / Ezzo, M.B. | Tema Archiv | 1994


    Flight service evaluation of composite helicopter components

    Mardoian, George H. / Ezzo, Maureen B. | NTRS | 1990