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Sensors 2015, 15(10), 27174-27200; doi:10.3390/s151027174

Dynamic Strain Measurements on Automotive and Aeronautic Composite Components by Means of Embedded Fiber Bragg Grating Sensors

1
Department of Mechanical Engineering, Vrije Universiteit Brussel (VUB), Pleinlaan 2, Elsene 1050, Belgium
2
Department of Material Science and Engineering, Ghent University Technologiepark Zwijn. 903, Zwijnaarde 9052, Belgium
3
Sirris Leuven-Gent Composites Application Lab, Celestijnenlaan 300C, Heverlee 3001, Belgium
4
Faculty of Applied Engineering, University of Antwerp, Campus Hoboken Salesianenlaan 90, Antwerp 2660, Belgium
*
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 8 September 2015 / Revised: 15 October 2015 / Accepted: 20 October 2015 / Published: 26 October 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [6385 KB, uploaded 27 October 2015]   |  

Abstract

The measurement of the internal deformations occurring in real-life composite components is a very challenging task, especially for those components that are rather difficult to access. Optical fiber sensors can overcome such a problem, since they can be embedded in the composite materials and serve as in situ sensors. In this article, embedded optical fiber Bragg grating (FBG) sensors are used to analyze the vibration characteristics of two real-life composite components. The first component is a carbon fiber-reinforced polymer automotive control arm; the second is a glass fiber-reinforced polymer aeronautic hinge arm. The modal parameters of both components were estimated by processing the FBG signals with two interrogation techniques: the maximum detection and fast phase correlation algorithms were employed for the demodulation of the FBG signals; the Peak-Picking and PolyMax techniques were instead used for the parameter estimation. To validate the FBG outcomes, reference measurements were performed by means of a laser Doppler vibrometer. The analysis of the results showed that the FBG sensing capabilities were enhanced when the recently-introduced fast phase correlation algorithm was combined with the state-of-the-art PolyMax estimator curve fitting method. In this case, the FBGs provided the most accurate results, i.e., it was possible to fully characterize the vibration behavior of both composite components. When using more traditional interrogation algorithms (maximum detection) and modal parameter estimation techniques (Peak-Picking), some of the modes were not successfully identified. View Full-Text
Keywords: fiber Bragg grating; optical sensing; CFRP and GFRP composites; dynamic measurements; modal parameters; demodulation algorithms fiber Bragg grating; optical sensing; CFRP and GFRP composites; dynamic measurements; modal parameters; demodulation algorithms
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lamberti, A.; Chiesura, G.; Luyckx, G.; Degrieck, J.; Kaufmann, M.; Vanlanduit, S. Dynamic Strain Measurements on Automotive and Aeronautic Composite Components by Means of Embedded Fiber Bragg Grating Sensors. Sensors 2015, 15, 27174-27200.

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