Finite element modelling of a composite wind turbine blade with fully-bonded and partically unbonded trailing edge

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Date

2018

Author

Özyıldız, Meltem

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In this thesis, strength analysis of an existing 5-meter glass-fiber epoxy composite wind turbine blade subjected to monotonic loading condition is presented. Finite element analysis is employed to simulate the virtual testing of the blade and understand the failure modes/mechanisms which may lead to the ultimate failure of the blade. CAD Model of the blade is prepared using NX 10.0 and ANSYS ACP/Pre module is utilized for building the material model of the blade. The evaluation of the stresses is carried out with two different approaches: linear elastic analysis using Tsai-Wu criteria and linear elastic analysis using Puck criteria. Linear analysis is carried out with ANSYS ACP/Post module. Analysis of the blade is also performed with the blade that has debonding in the trailing edge between the suction and pressure sides because the most critical damage occurs as debonding between suction and pressure sides of the blade. After the analysis of the blade, ANSYS ACP/Post module is used for the visualization of the results. Critical components and regions with the highest risk of failure are identified and the effect of debond region is assessed. The simulation results will be utilized to calibrate a 5-m blade test set-up and predict and compare with failure modes from blade testing.

Subject Keywords

Wind turbines., Blades., Turbine, Finite element method.

URI

http://etd.lib.metu.edu.tr/upload/12622226/index.pdf
https://hdl.handle.net/11511/27412

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. Özyıldız, “Finite element modelling of a composite wind turbine blade with fully-bonded and partically unbonded trailing edge,” M.S. - Master of Science, Middle East Technical University, 2018.