Some potentially low-cost manufacturing techniques to produce composite drive shafts for helicopter dynamic systems are investigated. These include a tow-placement process for graphite/PEEK composite, filament-winding of graphite/PEEK and resin-transfer-molding of a two-dimensionally braided graphite fiber preform with two different resin systems, a standard epoxy and a toughened epoxy. Shaft specimens were based upon an existing helicopter shaft and sized for the same design requirements. Damage resistance to 'low-velocity' impact events typical of tool drops and part handling was determined using an instrumented impact machine. Damage in the form of delaminations was found in all specimens for energies as low as 2 ft-lb. A dynamic model of the impact even confirmed that contact forces can develop during the impact because the high local stiffness of a cylindrical shell. Damage resistance results show that the tow-placed specimen and braided specimen with a toughened epoxy had the least amount of damage for a given impact. Specimens without and with impact damage were tested to ultimate torque. Results show that the tow-placed thermoplastic shaft had the highest residual strength after impact.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Damage tolerance evaluation of new manufacturing techniques for composite helicopter drive shafts


    Weitere Titelangaben:

    Die Ermittlung der Schadentoleranz von neuer Fertigungstechnik für Hubschrauberantriebswellen aus Verbundwerkstoff


    Beteiligte:
    Minguet, P.J. (Autor:in)


    Erscheinungsdatum :

    1993


    Format / Umfang :

    10 Seiten, 19 Bilder, 4 Tabellen, 6 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Rapid composite bonded repair for helicopter tail drive shafts

    Li, H.C.H. / Wang, J. / Baker, A. | Tema Archiv | 2012



    Toward a Damage Tolerance Evaluation of Helicopter Composite Components

    Candiani, L. / Mariani, U. / International Committee on Aeronautical Fatigue | British Library Conference Proceedings | 1995


    Fatigue Substantiation and Damage Tolerance Evaluation of Fiber Composite Helicopter Components

    Bansemir, H. / Emmerling, S. / North Atlantic Treaty Organization | British Library Conference Proceedings | 2000