Abstract
A novel element test specimen, considered to be representative of a thick composite laminate in a wind turbine rotor blade, is investigated in cyclic loading for fatigue delaminations. The element test specimen has an embedded artificial defect to mimic the delaminations in the spar cap of a 31 m wind turbine rotor blade. The aim was to measure the growth rate of delamination cracks and the temperature rise during the cracks propagation. It was noticed that four delamination cracks initiated and propagated, out of which two cracks were along the embedded defect interface planes and the other two originated from the crack-tips of a transvers tunneling crack in the resin pocket. The initial difference in the crack lengths of the four cracks translated throughout the cyclic loading. Initiation and propagation of multiple delamination cracks documented by the optical images were well correlated by the temperature distribution recorded from the thermal images.
Original language | English |
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Title of host publication | Proceedings of ECCM21 – 21st European Conference on Composite Materials : Material and Structural Behavior - Simulation & Testing |
Volume | 3 |
Place of Publication | Nantes, France |
Publisher | European Society for Composite Materials |
Publication date | 2024 |
Pages | 1132-1139 |
ISBN (Electronic) | 978-2-912985-01-9 |
Publication status | Published - 2024 |
Event | 21st European Conference on Composite Materials - Nantes, France Duration: 2 Jul 2024 → 5 Jul 2024 |
Conference
Conference | 21st European Conference on Composite Materials |
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Country/Territory | France |
City | Nantes |
Period | 02/07/2024 → 05/07/2024 |
Keywords
- Delamination
- Element test specimen
- Cyclic loading
- Fatigue crack growth
- Wind turbine rotor blade