Three‐dimensional (3‐D) finite element models of structural (scarf) repair of wind turbine blade, including the composite patch, adhesive, coating and parent composite structures is developed. Computational studies of the effect of the scarf angle, thickness of the adhesive layer and the availability of voids in the adhesive on the stress field in the repaired structure were carried out. It is observed that the soft adhesives lead to increased stresses in the parent laminate structures. The availability of voids in the adhesive leads to local stress concentration, and thus can reduce the postrepair reliability of the blades.

中文翻译：

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风力涡轮机叶片的结构修复：用于评估粘合性能影响的计算模型

开发了风力涡轮机叶片的结构（围巾）修复的三维（3D）有限元模型，包括复合材料贴片，粘合剂，涂层和母体复合材料结构。进行了围巾角度，胶粘剂层厚度和胶粘剂中空隙的可利用性对修复结构应力场的影响的计算研究。观察到，软粘合剂导致母体层压结构中的应力增加。粘合剂中空隙的可用性导致局部应力集中，因此会降低叶片的维修后可靠性。