Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 213, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2021.108933
Keywords
Carbon fibers; Fatigue; Sensing; Sandwich structures; Non-destructive testing
Categories
Funding
- National Key R&D Program of China [2018YFB1501201]
- National Nature Science Foundation of China [51905116]
- Fund of Zhuzhou Times New Material Technology Co. LtD [XCJS-C1-20190006]
- National Nature Science Foundation of China through the Research Fund for International Young Scientists [61950410620]
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The sensing module, consisting of CFRP packaging and FBG sensor, effectively monitors strain on wind turbine blades, providing longer lifetime and more reliable measurements compared to conventional electrical strain gauges.
A sensing module composed of a carbon fiber reinforced polymer (CFRP) packaging and an embedded fiber Bragg grating (FBG) sensor is proposed for strain monitoring of wind turbine blades. The sensing unit is designed and manufactured with the aim of maximizing the strain transfer from a CFRP wind blade to the FBG sensor. The performance of the packaged FBG sensors is experimentally investigated through exhaustive aging and fatigue tests. Then, a series of CFRP-packaged FBG sensors is used to monitor a full-scale 56.85 m-long wind blade during flapwise and edgewise fatigue tests over a few million dynamic strain cycles. Results demonstrate that the independent sensing modules provide efficient strain transfer, verifying a longer lifetime and more reliable measurements compared to conventional electrical strain gauges.
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