Structural Health Monitoring System of Composite Beams with Surface Bonded and Embedded Fibre Bragg Grating Sensors

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Abstract:

Fibre Bragg Grating (FBG) sensors are frequently being used for Structural Health Monitoring (SHM) of aerospace structures. One of the most important advantages of using FBG sensors is that it is possible to embed them into composites. In this paper, manufacturing methods of composite specimens with embedded FBG sensors are given. To avoid stress concentrations at ingress/egress regions of fibre optic wires, PTFE (Teflon) tubes were used during manufacturing. Moreover, FBG connectors melt at high curing temperatures. Therefore, those connectors were cut and after manufacturing, these connectors were spliced back to the FBG sensors. Embedded FBG’s were then checked and the correct wavelength data were taken. All the sensors were observed as intact and ready for bending tests. Procedure for bending tests is also explained including applied loads, boundary conditions, test setup and the peripheral equipment. Results of bending tests show that the system is an appropriate one for SHM purposes.

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332-336

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July 2017

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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[1] S. S. Kessler, Piezoelectric-Based In-Situ Damage Detection of Composite Materials for Structural Health Monitoring Systems, Ph.D. Dissertation, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, (2002).

Google Scholar

[2] H. Speckmann, H. Roesner., Structural Health Monitoring: A contribution to the Intelligent Aircraft Structure, Proceedings of ECNDT, 9th European Conference on NDT, Berlin, Germany (2006).

Google Scholar

[3] H. Guo et al., Fiber Optic Sensors for Structural Health Monitoring of Air Platforms, Sens. 11 (2011) 3687-3705.

DOI: 10.3390/s110403687

Google Scholar

[4] K. Lau et al., Strain Monitoring in FRP Laminates and Concrete Beams Using FBG Sensors, Comp. Struct. 51 (2001) 9-20.

DOI: 10.1016/s0263-8223(00)00094-5

Google Scholar

[5] Fundamentals of Fiber Bragg Grating Optical Sensing. National Instrument, (2016).

Google Scholar

[6] R. S. Muñoz, Structural Health Monitoring Using Embedded Fiber Optic Strain Sensors, Ph.D. Dissertation, the Graduate School, the University of Maine, (2008).

Google Scholar

[7] P. Pollock, Composite Structural Health Monitoring with Piezoelectric Wafer Active Sensors, M.S. Thesis, Department of Mechanical Engineering, University of South Carolina, (2009).

Google Scholar

[8] R. P. Beukema, Embedding Technologies of FBG Sensors in Composites: Technologies, Applications and Practical Use, Proceedings of the 6th European Workshop on Structural Health Monitoring, Dresden, Germany (2012).

Google Scholar

[9] D. Inaudi, B. Glisic, Overview of Fibre Optic Sensing Applications to Structural Health Monitoring, 13th FIG Symposium on Deformation Measurement and Analysis- 4th IAG Symposium on Geodesy for Geotechnical and Structural Engineering, Lisbon, Portugal (2008).

Google Scholar

[10] A. Güemes, A. Fernandez-Lopez, Damage Detection in Bolted Joints by Fibre Optics Distributed Sensing, 2nd International Symposium on NDT in Aerospace (2010).

Google Scholar

[11] B. Glisic, Y. Yao, Fiber Optic Method for Health Assessment of Pipelines Subjected to Earthquake-Induced Ground Movement, Struct. Health Monit. 0 (2012) 1-16.

DOI: 10.1177/1475921712455683

Google Scholar

[12] G. C. Kahandawa et al., Use of FBG Sensors for SHM in Aerospace Structures, Photo. Sens. 2 (2012) 203-214.

DOI: 10.1007/s13320-012-0065-4

Google Scholar

[13] J. R. Pedrazzani et al., Embedded and Surface Mounted Fiber Optic Sensors Detect Manufacturing Defects And Accumulated Damage As A Wind Turbine Blade Is Cycled To Failure" SAMPE Tech. Conf. Proc.: Emerging Opportunities: Materials and Process Solutions, Baltimore, MD, USA (2012).

Google Scholar

[14] M. Kunzler et al., Use of Multidimensional Fiber Grating Strain Sensors for Damage Detection in Composite Pressure Vessels, Smart Sensor Technology and Measurement Systems, SPIE 5758 (2005).

DOI: 10.1117/12.597633

Google Scholar

[15] R. Di Sante, Fibre Optic Sensors for Structural Health Monitoring of Aircraft Composite Structures: Recent Advances and Applications, Sens. 15 (2015) 18666, 18713.

DOI: 10.3390/s150818666

Google Scholar

[16] G. C. Kahandawa et al., Use of FBG Sensors for SHM in Aerospace Structures, Photo. Sens. 2 (2012) 203-214.

DOI: 10.1007/s13320-012-0065-4

Google Scholar