Fatigue Resistant Fiberglass Laminates for Wind Turbine Blades

    Research output: Contribution to conferencePaper


    Recent test results show that fiberglass laminates composed of unidirectional (0 degrees) and ..+-..45.. stranded fabric layers, typical blade materials, vary significantly in tensile fatigue resistance depending on the overall fiber content and the relative amounts of reinforcement in each direction. S-N fatigue data are presented for a range of laminates under both tensile and compressivefatigue loading. The reuslts show poorer than expected fatigue performance for laminates composed of stranded fabrics at (a) high fiber contents and (b) high relative amounts of ..+-..45..degree.. reinforcement. Optimum fatigue resistant materials appropriate for both flange areas and webs of blades are identified. Laminates which fall into the poor fatigue resistance category (similar to wovenfabrics and triax stitched fabrics) do not behave in a fiber-dominated manner which is required for application of the high cycle DOE/MSU database to lifetime prediction as described in Sutherland and Mandell (1996).
    Original languageAmerican English
    PagesVol. I: 46-51
    Number of pages6
    StatePublished - 1996
    EventEnergy Week '96 - Houston, Texas
    Duration: 29 Jan 19962 Feb 1996


    ConferenceEnergy Week '96
    CityHouston, Texas

    Bibliographical note

    Work performed by Montana State University, Bozeman, Montana

    NREL Publication Number

    • NREL/CP-21854


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