TY - CHAP
T1 - Fibre Bragg Grating Sensor Signal Post-processing Algorithm: Crack Growth Monitoring in Fibre Reinforced Plastic Structures
AU - Pereira, Gilmar Ferreira
AU - Mikkelsen, Lars Pilgaard
AU - McGugan, Malcolm
PY - 2016
Y1 - 2016
N2 - A novel method to assess a crack growing/damage event in fibre reinforced plastic, using conventional single mode Fibre Bragg Grating sensors embedded in the host material is presented in this article. Three different damage mechanisms that can change the sensor output, longitudinal strain εxx, transversal stress σyy;zz, and non-uniform strain εxx(xx), were identified. These damage mechanisms were identified during the experimental testing and linked with the sensor output using a digital image correlation technique. A dedicated algorithm to extract information from the reflected spectrum that enables crack detection was developed. Double Cantilever Beams specimens made with glass fibre and bonded with structural adhesive, were instrumented with a Fibre Bragg Grating array embedded in the host material, and tested using an experimental fracture procedure. This method was successfully validated in three different loading conditions, where were obtained very promising results that enable crack growth monitoring.
AB - A novel method to assess a crack growing/damage event in fibre reinforced plastic, using conventional single mode Fibre Bragg Grating sensors embedded in the host material is presented in this article. Three different damage mechanisms that can change the sensor output, longitudinal strain εxx, transversal stress σyy;zz, and non-uniform strain εxx(xx), were identified. These damage mechanisms were identified during the experimental testing and linked with the sensor output using a digital image correlation technique. A dedicated algorithm to extract information from the reflected spectrum that enables crack detection was developed. Double Cantilever Beams specimens made with glass fibre and bonded with structural adhesive, were instrumented with a Fibre Bragg Grating array embedded in the host material, and tested using an experimental fracture procedure. This method was successfully validated in three different loading conditions, where were obtained very promising results that enable crack growth monitoring.
KW - Fibre bragg grating sensor
KW - Crack growth monitoring
KW - Fibre reinforced plastic crack monitoring
KW - Digital image correlation
KW - Crack detection algorithm
U2 - 10.1007/978-3-319-30137-2_5
DO - 10.1007/978-3-319-30137-2_5
M3 - Book chapter
SN - 978-3-319-30135-8
T3 - Springer Proceedings in Physics
SP - 63
EP - 80
BT - Photoptics 2015
A2 - Ribeiro, P.
A2 - Raposo, M.
PB - Springer
ER -