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Smart Structures and Systems Volume 4, Number 4, July 2008 , pages 439-448 DOI: https://doi.org/10.12989/sss.2008.4.4.439 |
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Characterization of both adhesion and interfacial interaction between optical fiber coating and structural adhesives |
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A. Brotzu, F. Felli, L. Fiori and M. A. Caponero
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| Abstract | ||
| (Received December 15, 2006, Accepted October 4, 2007) Abstract. Optical fiber sensors are by now broadly accepted as an innovative and reliable device for structural health monitoring, to be used either embedded into or bonded on structures. The accuracy of the strain measurement achievable by optical fiber sensors is critically dependent on the characteristics of the bonding of the various interface layers involved in the sensor bonding/embedding (structure material and gluing agent, fiber coating and gluing agent, fiber coating and fiber core). In fact, the signal of the bonded/embedded optical fiber sensor must correspond to the strain experienced by the monitored structure, but the quality of each involved interface can affect the strain transfer. This paper faces the characterization, carried on by both mechanical tests and morphological analysis, of the strain transfer function resulting with epoxidic and vinylester gluing agent on polyimide and acrylate coated optical fibers. | ||
| Key Words | ||
| smart materials; interfaces; strength. | ||
| Address | ||
| A. Brotzu and F. Felli; Department ICMA, Universita degli studi di Roma a Sapienza Via Eudossiana 18, 00184 Rome, Italy L. Fiori and M. A. Caponero; ENEA CR Frascati, Via Enrico Fermi 47 Frascati, Rome, Italy | ||