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Proceedings Paper

Feasibility study of an embedded multi-axial fibre Bragg grating sensor
Author(s): G. Luyckx; W. De Waele; J. Degrieck; W. Van Paepegem; J. Vlekken; T. Verbeke
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Paper Abstract

This paper discusses a new sensor design based on optical fibre Bragg gratings which is being developed in the framework of the MASSFOS-project ('Multi-Axial Stress and Strain sensing of thermo hardened composite elements using Fibre Optic Sensors'-project). The objective of this ESA co-funded project is to develop a monitoring system which measures dynamically the multi-axial stress and strain plus temperature in thermo hardened composite elements. The sensor consists of a 'High Birefringence'-fibre in which two gratings have been inscribed; each grating yields two distinct Bragg peaks. The first grating is sensitive to the total stress field in the material, while the second one is isolated from transverse stress components. By measuring the four Bragg peaks of the sensor, it is theoretically possible to determine the total strain field, plus the temperature inside a composite material. Static experiments (a tensile test and a compressive test) have already been carried out to prove the feasibility of the sensor embedded in a composite laminate.

Paper Details

Date Published: 16 May 2007
PDF: 10 pages
Proc. SPIE 6585, Optical Sensing Technology and Applications, 65850E (16 May 2007); doi: 10.1117/12.722863
Show Author Affiliations
G. Luyckx, Ghent Univ. (Belgium)
W. De Waele, Ghent Univ. (Belgium)
J. Degrieck, Ghent Univ. (Belgium)
W. Van Paepegem, Ghent Univ. (Belgium)
J. Vlekken, Fos&s (Belgium)
T. Verbeke, Fos&s (Belgium)

Published in SPIE Proceedings Vol. 6585:
Optical Sensing Technology and Applications
Francesco Baldini; Jiri Homola; Robert A. Lieberman; Miroslav Miler, Editor(s)

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