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Publication - Professor Stephen Hallett

    Parametric study of the effect of wrinkle features on the strength of a tapered wind turbine blade sub-structure

    Citation

    Bender, JJ, Hallett, SR & Lindgaard, E, 2019, ‘Parametric study of the effect of wrinkle features on the strength of a tapered wind turbine blade sub-structure’. Composite Structures, vol 218., pp. 120-129

    Abstract

    Out of plane wrinkle defects are a major cause of strength reduction in structural composites. Therefore, this paper presents the numerical modelling of a wind turbine blade sub-structure with a tapered beam and a wrinkle. The model is validated against preliminary static tensile tests of a sub-structure without a wrinkle. There is a very good correlation between the predicted and experimentally obtained load at final delamination. A parametric study is then performed using the validated model to determine which wrinkle features are the most important to measure and include when determining the strength of a wrinkled wind turbine blade sub-structure. From the study, it is concluded that the maximum wrinkle angle is the most important feature, but the depth and wash out degree are also important under the right conditions.

    Full details in the University publications repository