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Field Deployable Fiber Bragg Grating Strain Patch for Long-Term Stable Health Monitoring Applications

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Author(s): Vivien Schukar | Nadine Kusche | Gerhard Kalinka | Wolfgang Habel

Journal: Applied Sciences
ISSN 2076-3417

Volume: 3;
Issue: 1;
Start page: 39;
Date: 2013;
Original page

Keywords: fiber Bragg grating | patch | strain gauge factor | temperature sensitivity | push-out test | validation | fatigue behavior

ABSTRACT
A fiber Bragg grating (FBG) strain patch specially adapted for long-term and high-strain applications has been developed and characterized. The design concept for the patch is based on a glass-fiber reinforced plastic (gfrp) carrier material. The developed concept for the FBG integration into the carrier material was derived from reliable integration procedure of FBG sensors into composite structures. The patches’ temperature sensitivity, strain gauge factor, fiber–matrix interface adhesion and fatigue behavior were characterized. As a result, FBG strain patches with linear temperature and strain behavior, as well as excellent fatigue resistance, were developed and can be used as part of a monitoring system for advanced composite materials in aerospace structures or wind turbine power plants.
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