Structural health monitoring of composite wind blades by fiber Bragg grating

Zhan-Sheng Guo; Junqian Zhang; Hongjiu Hu; Xingming Guo

doi:10.1117/12.779233

1 November 2007 Structural health monitoring of composite wind blades by fiber Bragg grating

Zhan-Sheng Guo, Junqian Zhang, Hongjiu Hu, Xingming Guo

Proceedings Volume 6423, International Conference on Smart Materials and Nanotechnology in Engineering; 64230I (2007) https://doi.org/10.1117/12.779233
Event: International Conference on Smart Materials and Nanotechnology in Engineering, 2007, Harbin, China

Abstract

The wind turbine industry is the fastest growing market area for the use of composite materials. Fiber Bragg grating sensor can be used to monitor the mechanical behavior of composite wind blade. The internal strain of composite wind blade during a constant stress amplitude fatigue testing process was monitored with fiber Bragg gratings sensors. FBG sensors can not only be embedded in composite structures to detect fatigue damage, but also have excellent durability compared with other sensors such as electric strain gauges. After 1 million cycles, the FBG sensors can still keep good sensibility. FBGs as a fatigue indicator are a novel sensor to monitor, evaluate and give crash alert for the health state of composite wind blades during their whole service life.

Citation Download Citation

Zhan-Sheng Guo, Junqian Zhang, Hongjiu Hu, and Xingming Guo "Structural health monitoring of composite wind blades by fiber Bragg grating", Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64230I (1 November 2007); https://doi.org/10.1117/12.779233

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