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Proceedings Paper

Strain measurement and cure monitoring in thin plates of composite materials by using twisted optical fibers
Author(s): Huiwen Wang; Jan Wu; Naiji Li; Hongjun Cao; Di Dai; Fuyuan Xie
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Paper 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.

Paper Details

Date Published: 24 September 1996
PDF: 6 pages
Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); doi: 10.1117/12.252166
Show Author Affiliations
Huiwen Wang, Beijing Institute of Technology (China)
Jan Wu, Beijing Institute of Technology (China)
Naiji Li, Beijing Institute of Technology (China)
Hongjun Cao, Beijing Institute of Technology (China)
Di Dai, Beijing Aeronautical Manufacturing Technology Research Institute (China)
Fuyuan Xie, Beijing Aeronautical Manufacturing Technology Research Institute (China)


Published in SPIE Proceedings Vol. 2895:
Fiber Optic Sensors V
Kim D. Bennett; Byoung Yoon Kim; Yanbiao Liao, Editor(s)

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