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Planar waveguide Bragg grating sensors for composite monitoring

Nuria Teigell Beneitez (UGent) , Jeroen Missinne (UGent) , Gabriele Chiesura (UGent) , Geert Luyckx (UGent) , Joris Degrieck (UGent) and Geert Van Steenberge (UGent)
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Abstract
Composite materials are extensively used in a wide array of application markets by virtue of their strength, stiffness and lightness. Many composite structures are replaced today not only after failure but also before, for precautionary reasons. Adding optical sensing intelligence to these structures not only prolongs their lifetime but also significantly reduces the use of raw materials and energy. The use of optical based sensors offer numerous advantages i.e. integrability, high sensitivity, compactness and electromagnetic immunity. Most sensors integrated in composites are based on silica fibers with Bragg gratings. However, polymers are an interesting alternative because they present several advantages. They have high values in the opticalconstants involved in sensing, are cost-effective and allow larger elongations than silica. Moreover, planar optical waveguides represent an interesting approach to be further integrated e.g. in circuits. We present a comparison between Ormocer®-based and epoxy-based polymer waveguide Bragg grating sensors. Both polymers were screened for their compatibility with composite production processes and for their sensitivity to measure temperature and stress. Ormocer®-based sensors were found to exhibit a very high sensitivity (-250 pm/°C) for temperature sensing, while the epoxy-based sensors, although less sensitive (-90 pm/°C) were more compatible with the epoxy-based composite production process. In terms of sensitivity to measure stress, both materials were found to be analogous with measured values of (2.98 pm/μepsilon) for the epoxy-based and (3.00 pm/μepsilon) for Ormocer®-based sensors. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Keywords
Raw materials, Fiber Bragg gratings, Silica, Strength, Waveguides, Polymers, Epoxies, Sensors, Composites, Planar waveguides

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Chicago
Teigell Beneitez, Nuria, Jeroen Missinne, Gabriele Chiesura, Geert Luyckx, Joris Degrieck, and Geert Van Steenberge. 2016. “Planar Waveguide Bragg Grating Sensors for Composite Monitoring.” In SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2016 Vol. 9803. SPIE.
APA
Teigell Beneitez, N., Missinne, J., Chiesura, G., Luyckx, G., Degrieck, J., & Van Steenberge, G. (2016). Planar waveguide Bragg grating sensors for composite monitoring. SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2016 (Vol. 9803). Presented at the Conference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems , SPIE.
Vancouver
1.
Teigell Beneitez N, Missinne J, Chiesura G, Luyckx G, Degrieck J, Van Steenberge G. Planar waveguide Bragg grating sensors for composite monitoring. SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2016 . SPIE; 2016.
MLA
Teigell Beneitez, Nuria, Jeroen Missinne, Gabriele Chiesura, et al. “Planar Waveguide Bragg Grating Sensors for Composite Monitoring.” SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2016 . Vol. 9803. SPIE, 2016. Print.
@inproceedings{7275141,
  abstract     = {Composite materials are extensively used in a wide array of application markets by virtue of their strength, stiffness and lightness. Many composite structures are replaced today not only after failure but also before, for precautionary reasons. Adding optical sensing intelligence to these structures not only prolongs their lifetime but also significantly reduces the use of raw materials and energy. The use of optical based sensors offer numerous advantages i.e. integrability, high sensitivity, compactness and electromagnetic immunity. Most sensors integrated in composites are based on silica fibers with Bragg gratings. However, polymers are an interesting alternative because they present several advantages. They have high values in the opticalconstants involved in sensing, are cost-effective and allow larger elongations than silica. Moreover, planar optical waveguides represent an interesting approach to be further integrated e.g. in circuits. We present a comparison between Ormocer{\textregistered}-based and epoxy-based polymer waveguide Bragg grating sensors. Both polymers were screened for their compatibility with composite production processes and for their sensitivity to measure temperature and stress. Ormocer{\textregistered}-based sensors were found to exhibit a very high sensitivity (-250 pm/{\textdegree}C) for temperature sensing, while the epoxy-based sensors, although less sensitive (-90 pm/{\textdegree}C) were more compatible with the epoxy-based composite production process. In terms of sensitivity to measure stress, both materials were found to be analogous with measured values of (2.98 pm/\ensuremath{\mu}epsilon) for the epoxy-based and (3.00 pm/\ensuremath{\mu}epsilon) for Ormocer{\textregistered}-based sensors. {\textcopyright} (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.},
  articleno    = {UNSP 98033P},
  author       = {Teigell Beneitez, Nuria and Missinne, Jeroen and Chiesura, Gabriele and Luyckx, Geert and Degrieck, Joris and Van Steenberge, Geert},
  booktitle    = {SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2016 },
  isbn         = {978-1-5106-0044-7},
  issn         = {0277-786X},
  language     = {eng},
  location     = {Las Vegas , Nevada, USA},
  publisher    = {SPIE},
  title        = {Planar waveguide Bragg grating sensors for composite monitoring},
  url          = {http://dx.doi.org/10.1117/12.2219151},
  volume       = {9803},
  year         = {2016},
}

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