Fiber Bragg Grating Sensors toward Structural Health Monitoring in Composite Materials: Challenges and Solutions

Nowadays, smart composite materials embed miniaturized sensors for structural health monitoring (SHM) in order to mitigate the risk of failure due to an overload or to unwanted inhomogeneity resulting from the fabrication process. Optical fiber sensors, and more particularly fiber Bragg grating (FBG) sensors, outperform traditional sensor technologies, as they are lightweight, small in size and offer convenient multiplexing capabilities with remote operation. They have thus been extensively associated to composite materials to study their behavior for further SHM purposes. This paper reviews the main challenges arising from the use of FBGs in composite materials. The focus will be made on issues related to temperature-strain discrimination, demodulation of the amplitude spectrum during and after the curing process as well as connection between the embedded optical fibers and the surroundings. The main strategies developed in each of these three topics will be summarized and compared, demonstrating the large progress that has been made in this field in the past few years.

[1]  Ralph P. Tatam,et al.  Strain development in curing epoxy resin and glass fibre/epoxy composites monitored by fibre Bragg grating sensors in birefringent optical fibre , 2005 .

[2]  Victor Mizrahi,et al.  Characterization of UV-induced birefringence in photosensitive Ge-doped silica optical fibers , 1994 .

[3]  Michael R Wisnom,et al.  In-situ measurement of chemical shrinkage of MY750 epoxy resin by a novel gravimetric method , 2004 .

[4]  H. Tam,et al.  Simple FBG sensor head design for strain-temperature discrimination , 2009, 2009 14th OptoElectronics and Communications Conference.

[5]  Hugo Thienpont,et al.  Microstructured Optical Fiber Sensors Embedded in a Laminate Composite for Smart Material Applications , 2011, Sensors.

[6]  Reinhardt Willsch,et al.  Combined time and wavelength multiplexing technique of optical fiber grating sensor arrays using commercial OTDR equipment , 2003 .

[7]  K. Goossen,et al.  Free-space input and output coupling to an embedded fiber optic strain sensor: dual-ended interrogation via transmission , 2011 .

[8]  Chang-Sun Hong,et al.  In situ simultaneous strain and temperature measurement of adaptive composite materials using a fiber Bragg grating based sensor , 2005, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[9]  Nobuo Takeda,et al.  Detection of transverse cracks in CFRP composites using embedded fiber Bragg grating sensors , 2000 .

[10]  Jacques Albert,et al.  Strain-optic coefficients of individual cladding modes of singlemode fibre: theory and experiment , 2006 .

[11]  J. Capmany,et al.  Influence of the Grating Parameters on the Polarization Properties of Fiber Bragg Gratings , 2009, Journal of Lightwave Technology.

[12]  Bo Liu,et al.  A novel fiber Bragg grating sensors multiplexing technique , 2005 .

[13]  D. Kinet,et al.  Self-Referenced Photon Counting OTDR Technique for Quasi-Distributed Fiber Bragg Gratings Sensors , 2012, IEEE Sensors Journal.

[14]  J. A. Guemes,et al.  Response of Bragg grating fiber-optic sensors when embedded in composite laminates , 2002 .

[15]  H. S. Wolff,et al.  iRun: Horizontal and Vertical Shape of a Region-Based Graph Compression , 2022, Sensors.

[16]  P. Healey,et al.  Optical time domain reflectometry by photon counting , 1980 .

[17]  T. Yoshino,et al.  Fast optical wavelength interrogator employing arrayed waveguide grating for distributed fiber Bragg grating sensors , 2003 .

[18]  J. Albert,et al.  Anomalous effective strain-optic constants of nonparaxial optical fiber modes. , 2014, Optics letters.

[19]  J. Capmany,et al.  Transverse Strain Measurements Using the Birefringence Effect in Fiber Bragg Gratings , 2007, IEEE Photonics Technology Letters.

[20]  W. Michie,et al.  Simultaneous measurement of strain and temperature: error analysis , 1997 .

[21]  Wim De Waele,et al.  Multi-axial strain transfer from laminated CFRP composites to embedded Bragg sensor: II. Experimental validation , 2010 .

[22]  Y. Ouerdane,et al.  Discriminated measures of strain and temperature in metallic specimen with embedded superimposed long and short fibre Bragg gratings , 2010 .

[23]  G. Luyckx,et al.  Temperature insensitive cure cycle monitoring of cross-ply composite laminates using the polarization dependent loss property of FBG , 2012 .

[24]  Lin Zhang,et al.  Blank beam fabrication of regenerated type IA gratings , 2004 .

[25]  J. R. White,et al.  Layer removal analysis of residual stress , 1989 .

[26]  A. K. Green,et al.  Termination and connection methods for optical fibres embedded in aerospace composite components , 1999 .

[27]  Patrice Mégret,et al.  Temperature and strain effects discrimination inside composite materials with embedded weakly tilted fibre Bragg grating , 2013, Other Conferences.

[28]  R. O. Claus,et al.  Nondestructive Testing of Composite Materials by OTDR in Imbedded Optical Fibers , 1986, Optics & Photonics.

[29]  Kazuro Kageyama,et al.  Structural health monitoring using fiber optic distributed sensors for vacuum-assisted resin transfer molding , 2007 .

[30]  M. Leblanc,et al.  Continuous arbitrary strain profile measurements with fiber Bragg gratings , 1998 .

[31]  Joël Cugnoni,et al.  Delamination detection and characterisation of bridging tractions using long FBG optical sensors , 2007 .

[32]  G. Saviano,et al.  New magnetic connector for embedding of optical sensors in composite materials , 2011, 2011 Fifth International Conference on Sensing Technology.

[33]  Hooman Nabovati,et al.  Fiber Optic Sensors , 2008 .

[34]  Peter W. R. Beaumont,et al.  The measurement and prediction of residual stresses in carbon-fibre/polymer composites , 1997 .

[35]  Vadakke Matham Murukeshan,et al.  Cure monitoring of smart composites using Fiber Bragg Grating based embedded sensors , 2000 .

[36]  Orlando Frazão,et al.  Simultaneous measurement of strain and temperature using type I and type IIA fibre Bragg gratings , 2003 .

[37]  Gregory P. Carman,et al.  Characterization and birefringence effect on embedded optical fiber Bragg gratings , 2009, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[38]  E. Schnack,et al.  Particular adaptation of X-ray diffraction to fiber reinforced composites , 2003 .

[39]  Rachid Gafsi,et al.  Analysis of Induced-Birefringence Effects on Fiber Bragg Gratings , 2000 .

[40]  J Capmany,et al.  Spectral characterization of differential group delay in uniform fiber Bragg gratings. , 2005, Optics express.

[41]  Kunigal N. Shivakumar,et al.  Mechanics of Failure of Composite Laminates with an Embedded Fiber Optic Sensor , 2004 .

[42]  Joris Degrieck,et al.  Strain Measurements of Composite Laminates with Embedded Fibre Bragg Gratings: Criticism and Opportunities for Research , 2010, Sensors.

[43]  Moshe Tur,et al.  Infrastructure development for incorporating fibre-optic sensors in composite materials , 2000 .

[44]  Hwa-Yaw Tam,et al.  Simultaneous strain and temperature measurement using a single fibre Bragg grating , 2000 .

[45]  Kara Peters,et al.  Method for determination of crack bridging parameters using long optical fiber Bragg grating sensors , 2003 .

[46]  J. A. Barnes,et al.  The formation of residual stresses in laminated thermoplastic composites , 1994 .

[47]  A. Cherouat,et al.  Determination of Residual Stress in Composite Laminates Using the Incremental Hole-drilling Method , 2003 .

[48]  G. C. Poddar,et al.  Single fiber Bragg grating sensor with two sections of different diameters for longitudinal strain and temperature discrimination with enhanced strain sensitivity. , 2009, The Review of scientific instruments.

[49]  R. Nogueira,et al.  Three-parameter optical fiber sensor based on a tilted fiber Bragg grating , 2010 .

[50]  S. James,et al.  Optical fibre grating refractometers for resin cure monitoring , 2007 .

[51]  Marc Wuilpart,et al.  Original interrogation system for quasi-distributed FBG-based temperature sensor with fast demodulation technique , 2009 .

[52]  Nobuo Takeda,et al.  Delamination detection in CFRP laminates with embedded small-diameter fiber Bragg grating sensors , 2002 .

[53]  Nobuo Takeda,et al.  Effect of thermal residual stress on the reflection spectrum from fiber Bragg grating sensors embedded in CFRP laminates , 2002 .

[54]  John P. Dakin,et al.  Discrimination between strain and temperature effects using dual-wavelength fibre grating sensors , 1994 .

[55]  Ignace Verpoest,et al.  Local strain in a 5-harness satin weave composite under static tension: Part I - Experimental analysis , 2011 .

[56]  B. Soller,et al.  High resolution optical frequency domain reflectometry for characterization of components and assemblies. , 2005, Optics express.

[57]  Michael A. Davis,et al.  Fiber grating sensors , 1997 .

[58]  L. Reekie,et al.  Novel interrogating system for fibre Bragg grating sensors using an acousto-optic tunable filter , 1993 .

[59]  Fabrice Pierron,et al.  Proceedings of the 15th European Conference on Composite Materials , 2012 .

[60]  Gang-Ding Peng,et al.  A fast response intrinsic humidity sensor based on an etched singlemode polymer fiber Bragg grating , 2013 .

[61]  J. Hattel,et al.  Life cycle strain monitoring in glass fibre reinforced polymer laminates using embedded fibre Bragg grating sensors from manufacturing to failure , 2014 .

[62]  Alexander L. Kalamkarov,et al.  The use of Fabry Perot fiber optic sensors to monitor residual strains during pultrusion of FRP composites , 1999 .

[63]  Hugo Thienpont,et al.  Embedded fiber Bragg gratings in photonic crystal fiber for cure cycle monitoring of carbon fiber-reinforced polymer materials , 2013, Europe Optics + Optoelectronics.

[64]  Wim De Waele,et al.  Transversal Load Sensing With Fiber Bragg Gratings in Microstructured Optical Fibers , 2009, IEEE Photonics Technology Letters.

[65]  J. Albert,et al.  Tilted fiber Bragg grating sensors , 2013 .

[66]  Ian Bennion,et al.  All-fibre optical sensing system: Bragg grating sensor interrogated by a long-period grating , 1998 .

[67]  R. R. Hill,et al.  Analysis of volumetric changes of unsaturated polyester resins during curing , 1995 .

[68]  Marc Wuilpart,et al.  Quasi-distributed temperature sensor combining Fibre Bragg Gratings and temporal reflectometry technique interrogation , 2009 .

[69]  R. Beukema.  Embedding Technologies of FBG Sensors in Composites : Technologies , Applications and Practical Use , 2016 .

[70]  S. Tsai,et al.  Composite Materials: Design and Applications , 2002 .

[71]  Keith W. Goossen,et al.  Nonpigtail optical coupling to embedded fiber Bragg grating sensors , 2010 .

[72]  Patrice Mégret,et al.  Weakly intrusive optical fibre connector for composite materials applications: vibration and temperature validation tests , 2013, Other Conferences.

[73]  A. Quintela,et al.  Uniform fiber Bragg grating first- and second-order diffraction wavelength experimental characterization for strain-temperature discrimination , 2001, IEEE Photonics Technology Letters.

[74]  R. Measures,et al.  A passive wavelength demodulation system for guided-wave Bragg grating sensors , 1992, IEEE Photonics Technology Letters.

[75]  Nobuo Takeda,et al.  Life cycle monitoring of large-scale CFRP VARTM structure by fiber-optic-based distributed sensing , 2011 .

[76]  Chander P. Grover,et al.  A comparison of wavelength dependent polarization dependent loss measurements in fiber gratings , 2000, IEEE Trans. Instrum. Meas..

[77]  Nuri Ersoy,et al.  Mechanisms generating residual stresses and distortion during manufacture of polymer-matrix composite structures , 2006 .

[78]  D. H. Kanga,et al.  The signal characteristics of reflected spectra of fiber Bragg grating sensors with strain gradients and grating lengths , 2005 .

[79]  D. Payne,et al.  The stress-optic effect in optical fibers , 1983, IEEE Journal of Quantum Electronics.

[80]  Anders Sjögren.  Manufacturing technique for embedding detachable fiber-optic connections in aircraft composite components , 2000 .

[81]  Jan-Anders E. Månson,et al.  Experimental investigation of the effect of the mould thermal expansion on the development of internal stresses during carbon fibre composite processing , 2008 .

[82]  H. Tam,et al.  Chirped and tilted fiber Bragg grating edge filter for in-fiber sensor interrogation , 2011, CLEO: 2011 - Laser Science to Photonic Applications.

[83]  Carlos Ramos,et al.  Health monitoring of composite structures by embedded FBG and interferometric Fabry-Pérot sensors , 2008 .

[84]  Ralph P. Tatam,et al.  Temperature and strain discrimination using a single tilted fibre Bragg grating , 2007 .

[85]  J. Berthelot,et al.  Composite Materials: Mechanical Behavior and Structural Analysis , 1999 .

[86]  Gang-Ding Peng,et al.  Bragg grating in a polymer optical fibre for strain, bend and temperature sensing , 2010 .

[87]  Yunjiang Rao,et al.  Simultaneous spatial, time and wavelength division multiplexed in-fibre grating sensing network , 1996 .

[88]  Mark E. Froggatt,et al.  Three-axis distributed fiber optic strain measurement in 3D woven composite structures , 2013, Smart Structures.

[89]  Wim De Waele,et al.  Residual strain-induced birefringent FBGs for multi-axial strain monitoring of CFRP composite laminates , 2013 .

[90]  R. Ulrich,et al.  Optical frequency domain reflectometry in single‐mode fiber , 1981 .

[91]  H. Sunak.  Optical fiber communications , 1985, Proceedings of the IEEE.

[92]  Lei Xu,et al.  Simultaneous pressure and temperature measurement using Hi-Bi fiber Bragg gratings , 2003 .

[93]  John Botsis,et al.  Characterisation of residual stresses in a single fibre composite with FBG sensor , 2007 .

[94]  Wim De Waele,et al.  Multi-axial strain transfer from laminated CFRP composites to embedded Bragg sensor: I. Parametric study , 2010 .

[95]  M. Wuilpart,et al.  Complete Analysis of Multireflection and Spectral-Shadowing Crosstalks in a Quasi-Distributed Fiber Sensor Interrogated by OFDR , 2012, IEEE Sensors Journal.

[96]  Zhiyi Zhang,et al.  Interrogating fiber Bragg grating sensors by thermally scanning a demultiplexer based on arrayed waveguide gratings. , 2004, Optics letters.

[97]  K. Himeno,et al.  Simultaneous Measurement of Temperature and Strain using PANDA Fiber Grating , 1997 .

[98]  Keith W. Goossen,et al.  Normal free space coupling to fiber Bragg grating sensors , 2009, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[99]  Yasir Nawab,et al.  Determination and modelling of the cure shrinkage of epoxy vinylester resin and associated composites by considering thermal gradients , 2012, Composites Science and Technology.

[100]  Lin Zhang,et al.  Fabricating fibre edge filters with arbitrary spectral response based on tilted chirped grating structures , 1999 .

[101]  Manuel Dierick,et al.  A micro-computer tomography technique to study the interaction between the composite material and an embedded optical fiber sensor , 2013 .

[102]  Hyun-Kyu Kang,et al.  Development of fibre optic ingress/egress methods for smart composite structures , 2000 .

[103]  M. Kumosa,et al.  Determination of Interlaminar Residual Thermal Stresses in a Woven 8HS Graphite/PMR-15 Composite Using X-Ray Diffraction Measurements , 2002 .

[104]  Patrice Mégret,et al.  Residual strain monitoring of out-of-autoclave cured parts by use of polarization dependent loss measurements in embedded optical fiber Bragg gratings , 2013 .

[105]  Ian Bennion,et al.  Use of dual-grating sensors formed by different types of fiber Bragg gratings for simultaneous temperature and strain measurements. , 2004, Applied optics.

[106]  H. Thomas Hahn,et al.  Residual Stresses in Polymer Matrix Composite Laminates , 1976 .

[107]  R. Kashyap.  Fiber Bragg Gratings , 1999 .

[108]  J. P. Carvalho,et al.  Discrimination of strain and temperature using Bragg gratings in microstructured and standard optical fibres , 2005 .

[109]  G.M. Williams,et al.  Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination , 1996, IEEE Photonics Technology Letters.

[110]  Hyun-Kyu Kang,et al.  Cure monitoring of composite laminates using fiber optic sensors , 2002 .

[111]  L. Ferreira,et al.  Simultaneous measurement of strain and temperature using Bragg gratings written in germanosilicate and boron-codoped germanosilicate fibers , 1999, IEEE Photonics Technology Letters.

[112]  B. S. Ben,et al.  Damage identification in composite materials using ultrasonic based Lamb wave method , 2013 .

[113]  A. Vautrin,et al.  A Fresnel's Reflection Optical Fiber Sensor for Thermoset Polymer Cure Monitoring , 2004 .

[114]  Bing Qi,et al.  Optical time-domain reflectometry interrogation of multiplexing low-reflectance Bragg- grating-based sensor system , 2003 .

[115]  Nobuo Takeda,et al.  Life cycle monitoring and advanced quality assurance of L-shaped composite corner part using embedded fiber-optic sensor , 2013 .

[116]  G. Hocker,et al.  Fiber optics strain gauge. , 1978, Applied optics.

[117]  Kyriacos Kalli,et al.  Fiber Bragg Gratings: Fundamentals and Applications in Telecommunications and Sensing , 2000 .

[118]  C. Caucheteur,et al.  Demodulation technique for weakly tilted fiber Bragg grating refractometer , 2005, IEEE Photonics Technology Letters.

[119]  J. Canning.  Fibre gratings and devices for sensors and lasers , 2008 .