Assessing Mechanical-Adhesive Hybrid Joints for Segmented Wind Turbine Blades: A Parametric Study using Simulation Methods

Wind turbine manufacturers are continuously pushing for larger rotor diameters to capture more wind and generate energy cost-effectively. As the dimensions of rotor blades increase, their manufacturing, transportation, and installation become progressively more intricate, time-consuming, and costly. A potential solution lies in spanwise segmentation. Nevertheless, available segmented blade technologies are still relatively immature, have drawbacks, and are yet to be used for blades longer than 80 m. A major challenge with segmented blades lies in the addition of joints, which can lead to structural and aeroelastic disadvantages when compared to monolithic designs. In this study, we investigate the potential and initial feasibility of an adhesively bonded snap-fit joint for segmenting a reference 10 MW wind turbine blade. Using finite element analysis under quasi-static loading conditions, the snap-fit joint is sized and parametrically assessed, evaluating the forces needed for assembly and its ability to transfer operational loads. The results demonstrate the joint’s capability to transmit axial loads up to around 15.4 MN, successfully meeting the design requirements and validating its initial feasibility in accordance with the study’s primary objective.