Strain measurement and cure monitoring in thin plates of composite materials by using twisted optical fibers

Huiwen Wang; Jan Wu; Naiji Li; Hongjun Cao; Di Dai; Fuyuan Xie

doi:10.1117/12.252166

24 September 1996 Strain measurement and cure monitoring in thin plates of composite materials by using twisted optical fibers

Huiwen Wang, Jan Wu, Naiji Li, Hongjun Cao, Di Dai, Fuyuan Xie

Author Affiliations +

Proceedings Volume 2895, Fiber Optic Sensors V; (1996) https://doi.org/10.1117/12.252166
Event: Photonics China '96, 1996, Beijing, China

Abstract

We report here the experimentation of an embedded fiber optic sensor applied on cure monitor and strain measurement of composite materials. This sensor using twisted standard communication gradient optical fibers utilizes the optical loss due to fiber microbending dependance on the internal strain on composites. The choices of optical fibers and parameters of this kind of sensors are discussed in this paper. Recently there has been an international interest in embedding optic fiber sensors in composite materials to monitor the cure process and measure the strain and damage. Many ways have been used, such as the methods of interference, grating, polarization and intensity, etc. Our purpose is to select a simple and inexpensive method. So under the present conditions of our experimental house, we have embedded twisted standard communication multi-modes gradient optical fibers in composite materials and made altogether studies of the cure, the strain and the damage. Satisfied results have been obtained and the method is worthy of further research.

Citation Download Citation

Huiwen Wang, Jan Wu, Naiji Li, Hongjun Cao, Di Dai, and Fuyuan Xie "Strain measurement and cure monitoring in thin plates of composite materials by using twisted optical fibers", Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); https://doi.org/10.1117/12.252166

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KEYWORDS

Optical fibers

Composites

Fiber optics sensors

Sensors

Fiber optic communications

Optical communications

Polarization

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