Abstract
Abstract. This work presents a methodology to evaluate the effect of wrinkle defects in the stiffness response of laminate characteristic of wind turbine blades. The assessment is carried out through numerical models and experimental tests with coupon specimens embedded with artificial wrinkles. Specimens are manufactured with two types of defects, prone to arising along the manufacturing process of wind turbine blades. Image-based numerical models were built to enclose the actual features of the cross-sectional wrinkling of each defect type. Experimental quasi-static tension and compression tests were performed, where extensometers collect the strain distribution about the wrinkle section as around the flat section of the test specimens. Two-dimensional finite element simulations carried out in Abaqus/Standard captured the stiffness behaviour of the two types of wrinkles. The numerical approach is validated against the quasi-static tests retrieving a fair agreement with experimental data. A significant knock-down in the stiffness response was found due to the wrinkle with larger aspect ratio of amplitude / half-wavelength.
Subject
Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment
Reference28 articles.
1. 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
2. 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
3. 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
4. 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
5. 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
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献