Strain sensing in fatigue test of metallic material at liquid nitrogen temperature using fiber Bragg gratings

Rong Fu; Dongsheng Zhang; Jieyan Li; Wei Li

doi:10.1117/12.867895

11 October 2010 Strain sensing in fatigue test of metallic material at liquid nitrogen temperature using fiber Bragg gratings

Rong Fu, Dongsheng Zhang, Jieyan Li, Wei Li

Author Affiliations +

Proceedings Volume 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 765635 (2010) https://doi.org/10.1117/12.867895
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

The problem about the chirp phenomenon of the FBG reflection spectrums which is usually observed in the previous experiments has been properly solved. We found that FBG chirp phenomena at liquid nitrogen temperature are not caused by optical mechanism, but are mainly attributed to the inhomogeneous strain distribution. The chirp phenomena of FBGs at liquid nitrogen temperature can be eliminated by proper packaging process. A real-time strain sensing in fatigue test of metallic material at liquid nitrogen temperature using fiber Bragg gratings was conducted. The experimental results are significant to the applications and research of Fiber Bragg Grating in the fields of aerospace and superconducting.

Citation Download Citation

Rong Fu, Dongsheng Zhang, Jieyan Li, and Wei Li "Strain sensing in fatigue test of metallic material at liquid nitrogen temperature using fiber Bragg gratings", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 765635 (11 October 2010); https://doi.org/10.1117/12.867895

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