Effect of tunneling cracks on structural property degradation of wind turbine blades

Oscar Castro*, Kim Branner

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    In this study, a multi-scale structural approach is used to analyze the effect of tunneling cracks on the structural response of wind turbine blades. In this approach, a 2D finite-element-based cross-section analysis and a continuum damage mechanics model are combined to efficiently predict the variation in cross-section stiffnesses and natural frequencies of the blades as a function of the tunneling crack density. By applying this approach to an 86.35-meter wind turbine blade, it is shown how the level of variation of these structural properties depends not only on the degradation of the material properties due to the presence of tunneling cracks but also on the spatial characteristics of the different cross-section regions along the blade, such as spar caps, trailing-edge panels, etc.
    Original languageEnglish
    Article number113914
    JournalComposite Structures
    Volume268
    Number of pages15
    ISSN0263-8223
    DOIs
    Publication statusPublished - 2021

    Keywords

    • Wind turbine blades
    • Multi-scale structural approach
    • Contiuum damage mechanics
    • Stiffness degradation
    • Tunneling tracks

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