Modeling and Stress Analysis of a Wind Turbine Blade

The paper focuses on the development and modelling of a 61.5 meter long wind turbine blade intended for use in a high wind speed location, with a specific layer thickness of 0.28 mm. As renewable energy sources, including wind energy, gain prominence in combating climate change and ensuring energy sustainability, understanding the performance of such structures becomes crucial. The research employs the COMSOL Multiphysics 6.0 software and specialized 3D modeling tools to meticulously craft a geometry model of the wind turbine blade. This intricate model is then subjected to Finite Element (FE) analysis using a layered shell interface based on layer-wise theory. The blade's design incorporates various materials: Carbon-epoxy, 10 layers of Glass-vinylester, 40 layers of PVC foam, and a single layer for specific purposes. Two main types of analyses are stationary and Eigenfrequency. The blade's structure is divided into 19 sections, each characterized by a distinct airfoil shape to optimize performance. The study delves into the gravitational, and centrifugal loads to comprehensively assess the blade's behavior. The distribution of Von Mises stress within the blade's skin and spar components under combined loads is a key focus. In the skin, the Von Mises stress distribution is reported at 3.07 10 ⁸ N/m², while in the spar, the distribution reaches 2.47 10 ⁸ N/m².