Journal
COMPOSITE STRUCTURES
Volume 136, Issue -, Pages 251-257Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2015.10.007
Keywords
Wind turbine blade; Fatigue damage; Fracture pattern; Structural collapse
Categories
Funding
- New and Renewable Energy of Korea Institute of Energy Technology Evaluation and Planning (KETEP) [2012T100201707]
Ask authors/readers for more resources
The effect of fatigue damage on the residual strength of a large wind turbine blade is a very important issue in the wind industry. To test the residual strength after fatigue testing, this study prepared a test specimen, a 48.3 m wind turbine blade that had experienced initial static tests and then fatigue tests in accordance with the technical specification IEC TS 61400-23. The prepared specimen was loaded sequentially along the positive flapwise, the positive edgewise, and the negative flapwise direction, while video-recording the test situations. The wind turbine blade was able to sustain the loads in the first two tests, but the blade collapsed in the third test when the negative flapwise load reached 70% of the maximum target value, a value representing 50% of the most severe load in the first test. Based on the recorded information and the fracture patterns at the blade's broken section, the collapse processes were analyzed. From this analysis we suggest a modified laminate pattern that can enhance the residual strength of a fatigue damaged wind turbine blade. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available