JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A 2012 Vol.13 No.7 P.538-545

Strain transfer of surface-bonded fiber Bragg grating sensors for airship envelope structural health monitoring

Author(s): Hai-tao Zhao, Quan-bao Wang, Ye Qiu, Ji-an Chen, Yue-ying Wang, Zhen-min Fan
Affiliation(s): School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding email(s): zht@sjtu.edu.cn, qiuye@sju.edu.cn
Key Words: Airship envelope, Fiber Bragg grating (FBG), Surface-bonded, Strain transfer, Structural health monitoring (SHM)

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Abstract: This paper deals with an improved bonding approach of surface-bonded fiber Bragg grating (FBG) sensors for airship envelope structural health monitoring (SHM) under the strain transfer theory. A theoretical formula is derived from the proposed model to predict the strain transfer relationship between the airship envelope and fiber core. Then theoretical predictions are validated by numerical analysis using the finite element method (FEM). Finally, on the basis of the theoretical approach and numerical validation, parameters that influence the strain transfer rate from the airship envelope to fiber core and the ratio of effective sensing length are analyzed, and some meaningful conclusions are provided.

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[13][doi:10.1631/jzus.A0820814]

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