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Proceedings Paper

Microstructure of the smart composite structures with embedded fiber optic sensing nerves
Author(s): Jingyuan Liu; Fei Luo; Changchun Li; Naibin Ma
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Paper Abstract

The composite structures with embedded optical fiber sensors construct a smart composite structure system, which may have the characteristics of the in-service self-measurement, self- recognition and self-judgement action. In the present work, we studied the microstructures of carbon/epoxy composite laminates with embedded sensing optical fibers, and the integration of optical fiber with composites was also discussed. The preliminary experiment results show that because of the difference between the sensing optical fibers and the reinforcing fibers in their size, the microstructure of the composites with embedded optical fibers will produce partial local changes in the area of embedded optical fiber, these changes may affect the mechanical properties of composite structures. When the optical fibers are embedded parallel to the reinforcing fibers, due to the composite prepregs are formed under a press action during its curing process, the reinforcing fibers can be arranged equably around the optical fibers. But when the optical fibers are embedded perpendicularly to the reinforcement fibers, the resin rich pocket will appear in the composite laminates surrounding the embedded optical fiber. The gas holes will be easily produced in these zones which may produce a premature failure of the composite structure. The photoelastic experiments are also given in the paper.

Paper Details

Date Published: 14 November 1997
PDF: 5 pages
Proc. SPIE 3241, Smart Materials, Structures, and Integrated Systems, (14 November 1997); doi: 10.1117/12.293525
Show Author Affiliations
Jingyuan Liu, Nanjing Univ. of Aeronautics and Astronautics (China)
Fei Luo, Nanjing Univ. of Aeronautics and Astronautics (China)
Changchun Li, Nanjing Univ. of Aeronautics and Astronautics (China)
Naibin Ma, Nanjing Univ. of Aeronautics and Astronautics (China)

Published in SPIE Proceedings Vol. 3241:
Smart Materials, Structures, and Integrated Systems
Alex Hariz; Vijay K. Varadan; Olaf Reinhold, Editor(s)

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