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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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https://doi.org/10.5194/wes-2020-44
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-44
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 23 Mar 2020

Submitted as: research article | 23 Mar 2020

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This preprint is currently under review for the journal WES.

Virtual full-scale testing for investigating strength characteristics of a composite wind turbine blade

Can Muyan1,2 and Demirkan Coker1,2 Can Muyan and Demirkan Coker
  • 1Aerospace Department, Middle East Technical University, Ankara, 06800, Turkey
  • 2Structural Mechanics and Materials Laboratory, RUZGEM (METUWIND) Center for Wind Energy Research, Middle East Technical University, Ankara, 06800, Turkey

Abstract. Full-scale structural tests enable us to monitor mechanical response of the blades under various loading scenarios. Yet these tests must be accompanied with numerical simulations, so that the physical basis of the progressive damage development can be captured and interpreted correctly. Within the scope of this paper the previous work of the authors concerning the strength analysis of an existing 5-m GFRP wind turbine blade using Puck failure criteria is revisited. An important outcome of the previous study was that nonlinear Puck material model was found to be necessary for a more realistic simulation of failure mechanisms. In the current work, under extreme load cases internal flange at the leading edge, trailing edge of the blade are identified as the mainly damaged regions. Moreover, dominant failure mechanism is expected to be the de-bonding at the trailing and leading edges. When extreme load case is applied as a combination of edge-wise and flap-wise loading cases, less damage is observed compared to the pure flap-wise loading case. This damage evolution is attributed to the stiffer structural behavior of the blade under combined loading condition.

Can Muyan and Demirkan Coker

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Status: open (until 04 May 2020)
Status: open (until 04 May 2020)
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Can Muyan and Demirkan Coker

Can Muyan and Demirkan Coker

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Latest update: 29 Mar 2020
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Short summary
Wind turbine blade prototypes are subjected to structural tests before they are used in the field so that any design failures can be detected prior to their operation. In this study, virtual testing of a small scale existing 5-m wind turbine blade is carried out utilizing the Finite-Element-Method software package ANSYS. The results show that compared to pure flap-wise loading, if the test loading is applied as a combination of flap-wise and edgewise loading less damage evolution is observed.
Wind turbine blade prototypes are subjected to structural tests before they are used in the...
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