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Frontiers of Optoelectronics

, Volume 11, Issue 1, pp 60–68 | Cite as

Use of fiber Bragg grating sensors for monitoring delamination damage propagation in glass-fiber reinforced composite structures

  • Ayad Kakei
  • Jayantha A. Epaarachchi
Research Article

Abstract

Embedded fiber Bragg grating (FBG) sensors have been widely used for damage monitoring of fiber composite structures for a few decades. However, many remaining engineering challenges have delayed FBG based in situ structural health monitoring (SHM) systems. One of the major problem associated with FBG based SHM system is the unavailability of reliable data processing algorithms. The present work details a study which has been undertaken for identification of delamination crack propagation in fiber reinforced polymer (FRP) composite plate under uniaxial loading. The strain measured by embedded FBG sensors closer to the crack tip was used to qualitatively and quantitatively analyze delamination damage propagation using recently proposed elasto-plastic model. Strain energy release rate was calculated and compared with the model prediction. The study has concluded that the delamination crack propagation in a FRP composite can be monitored successfully using an integral approach of FBG sensors measurements and the predictions of proposed elasto-plastic model.

Keywords

fiber Bragg grating (FBG) sensors composite damage modelling fracture energy 

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Notes

Acknowledgements

Authors like to acknowledge the technical support provided by Mr. Mohan Trada, School of Mechanical and Electrical Engineering and Mr. Wayne Crowell, Centre for Future Materials of USQ.

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Copyright information

© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Mechanical and Electrical EngineeringUniversity of Southern QueenslandToowoombaAustralia
  2. 2.Centre for Future MaterialsUniversity of Southern QueenslandToowoombaAustralia
  3. 3.College of EngineeringUniversity of KirkukKirkukIraq

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