Curing residual strain monitoring in different layer of Gr/epoxy laminated composites using embedded optical fiber Bragg grating sensors

Min-Yuan Hsieh; Liren Tsai; Chia-Chin Chiang; Chih-Lang Lin; Bo-Lan Fang

doi:10.1117/12.921201

12 April 2012 Curing residual strain monitoring in different layer of Gr/epoxy laminated composites using embedded optical fiber Bragg grating sensors

Min-Yuan Hsieh, Liren Tsai, Chia-Chin Chiang, Chih-Lang Lin, Bo-Lan Fang

Author Affiliations +

Proceedings Volume 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering; 840919 (2012) https://doi.org/10.1117/12.921201
Event: Third International Conference on Smart Materials and Nanotechnology in Engineering, 2011, Shenzhen, China

Abstract

The Gr/Epoxy laminated composite materials have high specific stiffness and strength for applications in the aerospace and industries. It is important to monitor the curing residual stress to ensure the reliability of composite materials. Fiber Bragg Grating (FBG) sensors are small and compatible with polymeric materials so that they can be easily embedded into the internal sensing site of a composite structure without introducing significant defections. This study embedded 4 FBGs into different laminae of composite materials to monitor the internal residual strain during the curing process. The curing residual strain was assessed via changes in the shape of the optical spectra, intensity attenuation and shifts in wavelengths of FBGs. Utilizing this approach we can monitor curing residual strains in different layers of the composite during the curing process.

Citation Download Citation

Min-Yuan Hsieh, Liren Tsai, Chia-Chin Chiang, Chih-Lang Lin, and Bo-Lan Fang "Curing residual strain monitoring in different layer of Gr/epoxy laminated composites using embedded optical fiber Bragg grating sensors", Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 840919 (12 April 2012); https://doi.org/10.1117/12.921201

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