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Carbon fibre-foam sandwich composite laminate embedded with fiber Bragg grating sensors

Conference Paper


Abstract


  • Carbon fibre-foam sandwich composite with embedded FBGs are fabricated and dynamic load testing and temperature

    studies were carried out. It was found from the tests that, the embedded FBG can measure the strain inside a sandwich

    composite, but a gauge factor is required to measure the absolute strain experienced inside the composite. The

    temperature sensitivity of the embedded FBG is found to be close to that of the free space sensitivity of the FBG,

    concluding that the thermal expansion of the carbon fibre-foam composite is minimal and has negligible effect on the

    embedded grating. The effect of the foam relaxation is also studied and it is found that foam relaxation can contribute to

    a strain error of ±16 με in strain measurements during the observed time period in this study. The results presented in this

    paper points to a direction that, embedded FBGs can be reliably used for strain measurement in sandwich composites and

    is less impacted by the thermal expansion of the composite laminate which is an advantage compared to other types of

    composite laminates. Further studies are required to estimate the FBG gauge factor for strain measurements and also to

    quantify the foam relaxation error based on an applied load.

UOW Authors


  •   Rajan, Ginu
  •   Darminan, E (external author)
  •   Peng, Gang-Ding (external author)
  •   Prusty, Gangadhara B. (external author)

Publication Date


  • 2014

Citation


  • G. Rajan, E. Darminan, G. Peng & G. Prusty, "Carbon fibre-foam sandwich composite laminate embedded with fiber Bragg grating sensors," in 23rd International Conference on Optical Fibre Sensors, 2014, pp. 91579X-1-91579X-4.

Scopus Eid


  • 2-s2.0-84903214586

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/4299

Start Page


  • 91579X-1

End Page


  • 91579X-4

Place Of Publication


  • United States

Abstract


  • Carbon fibre-foam sandwich composite with embedded FBGs are fabricated and dynamic load testing and temperature

    studies were carried out. It was found from the tests that, the embedded FBG can measure the strain inside a sandwich

    composite, but a gauge factor is required to measure the absolute strain experienced inside the composite. The

    temperature sensitivity of the embedded FBG is found to be close to that of the free space sensitivity of the FBG,

    concluding that the thermal expansion of the carbon fibre-foam composite is minimal and has negligible effect on the

    embedded grating. The effect of the foam relaxation is also studied and it is found that foam relaxation can contribute to

    a strain error of ±16 με in strain measurements during the observed time period in this study. The results presented in this

    paper points to a direction that, embedded FBGs can be reliably used for strain measurement in sandwich composites and

    is less impacted by the thermal expansion of the composite laminate which is an advantage compared to other types of

    composite laminates. Further studies are required to estimate the FBG gauge factor for strain measurements and also to

    quantify the foam relaxation error based on an applied load.

UOW Authors


  •   Rajan, Ginu
  •   Darminan, E (external author)
  •   Peng, Gang-Ding (external author)
  •   Prusty, Gangadhara B. (external author)

Publication Date


  • 2014

Citation


  • G. Rajan, E. Darminan, G. Peng & G. Prusty, "Carbon fibre-foam sandwich composite laminate embedded with fiber Bragg grating sensors," in 23rd International Conference on Optical Fibre Sensors, 2014, pp. 91579X-1-91579X-4.

Scopus Eid


  • 2-s2.0-84903214586

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/4299

Start Page


  • 91579X-1

End Page


  • 91579X-4

Place Of Publication


  • United States