Articles | Volume 7, issue 6
https://doi.org/10.5194/wes-7-2513-2022
https://doi.org/10.5194/wes-7-2513-2022
Research article
 | 
22 Dec 2022
Research article |  | 22 Dec 2022

Methodology to predict stiffness knock-down in laminates for wind turbine blades with artificial wrinkles

Heloisa Guedes Mendonça, Lars Pilgaard Mikkelsen, Xiao Chen, Johannes Bode, Flemming Mortensen, Philipp Ulrich Haselbach, and Kim Branner

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Thematic area: Materials and operation | Topic: Material science and structural mechanics
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Cited articles

ASTM International: ASTM D 3039-00, Standard test method for tensile properties of polymer matrix composite materials, American Society for Testing and Materials, West Conshohocken, PA, USA, https://www.astm.org/d3039_d3039m-14.html (last access: 21 December 2022), 2017. a
Bender, J. J., Hallett, S. R., and Lindgaard, E.: Parametric study of the effect of wrinkle features on the strength of a tapered wind turbine blade sub-structure, Compos. Struct., 218, 120–129, https://doi.org/10.1016/j.compstruct.2019.02.065, 2019. a, b, c
Bloom, L.D ., Wang, J., and Potter, K. D.: Damage progression and defect sensitivity: an experimental study of representative wrinkles in tension, Compos. Part B-Eng., 45, 449–458, https://doi.org/10.1016/j.compositesb.2012.05.021, 2013. a
Chan, W. S. and Chou, C. J.: Effects of delamination and ply fiber waviness on effective axial and bending stiffnesses in composite laminates, Compos. Struct., 30, 299–306, https://doi.org/10.1177/089270579400700306, 1995. a
Chan, W. S. and Wang, J. S.: Influence of fiber waviness on the structural response of composite laminates, J. Thermoplast. Compos., 7, 243–260, 1994. a
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Short summary
Wrinkles are production defects of wind turbine blades characterized by fibre waviness through the laminate thickness. Such defects are pointed to as one of the primary sources of premature failure of the blade, which impacts the structure's structural reliability. This work shows a methodology to evaluate the impact of wrinkles on wind turbine blades featuring preliminary results, which present the detrimental effect of small wrinkles on the structural response of the blade.
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