Finite element analysis of the cross-section of wind turbine blades; a comparison between shell and 2D-solid models

D. Pardo, K. Branner

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    Abstract

    A very detailed 2D-solid finite element model is developed representing the load carrying box girder of a
    wind turbine blade. Using typical geometrical values for the girder dimensions and public available material
    data, the overall cross-sectional behaviour is analysed for a simple compressive line load. The results are
    compared with result from similar shell models, which typically are used for practical design. Usually, good
    agreement between the shell models and the detailed 2D-solid model is found for the deflections, strains
    and stresses in regions with loads from pure bending. However, large differences can exist in regions where
    the loading is dominated by shear. It is found that geometrical non-linearity starts to become important
    when deflections are of the same order as the laminate thickness.
    Original languageEnglish
    JournalWind Engineering
    Volume29
    Pages (from-to)25-32
    ISSN0309-524X
    Publication statusPublished - 2005

    Keywords

    • FEA model
    • Wind turbine blade
    • Box girder
    • Strain and stress
    • Non-linear analysis

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