The effect of z-pinning on the fatigue strength of unidirectional carbon/epoxy composites under cyclic tensile or compressive loading is determined. Experimental testing revealed that z-pinning degrades the elastic modulus, ultimate strength and fatigue strength of composites in tension or compression. The tensile fatigue strength is degraded by damage due to z-pinning, particularly fiber dilution caused by swelling, fiber breakage and resin-rich zones. The reduction to the compressive fatigue strength is attributed to laminate swelling and fiber distortion, which lowers the compressive stress required to cause failure by fiber kinking. Data presented in the paper reveals that the adverse affect of z-pinning on the fatigue strength could be minimized by using very fine pins.


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    Titel :

    Fatigue properties of z-pinned aircraft composite materials


    Weitere Titelangaben:

    Ermüdungseigenschaften von z-verstifteten Flugzeug-Verbundwerkstoffen


    Beteiligte:
    Mouritz, A.P. (Autor:in) / Chang, P. (Autor:in) / Cox, B.N. (Autor:in)


    Erscheinungsdatum :

    2006


    Format / Umfang :

    8 Seiten, 7 Bilder, 2 Tabellen, 8 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    DESIGN DILEMMA FOR Z-PINNED COMPOSITE STRUCTURES

    Mouritz, A.P. / International Council of the Aeronautical Sciences; Optimage Ltd | British Library Conference Proceedings | 2010