University of Hertfordshire

From the same journal

By the same authors

  • Yiding Liu
  • Anubhav Singh
  • Yifei Yu
  • Guillaume Remy
  • Barnett Alastair
  • Barbour Steve
  • Darren Hughes
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Original languageEnglish
Number of pages21
JournalApplied Composite Materials
Publication statusPublished - 26 Aug 2022


In this paper, consolidation monitoring and structural health monitoring (SHM) of a braided thermoplastic composite beam was performed using a distributed optical fibre sensor (DOFS). The DOFS was manually embedded into the braided preform before melt processing. The real-time strain and temperature data obtained during consolidation and cooling segments were correlated with phase transitions in the thermoplastic matrix. Post consolidation, the quality of the embedded DOFS was investigated using a micro-CT to reveal defects such as waviness and misorientation due to the crude nature of the adopted embedding technique. The manufactured beam was then subjected to repeated loading-unloading cycles in a flexure test. The strain developments along the embedded optical fibre length were comparable with the measurements from Digital Image Correla- tion (DIC), and further correlated with the post damage observations. Despite the crude method of embedding the optical fibre, the monitored data was useful for consolidation monitoring as well as SHM. This proved that DOFS could be embedded into composite structures without adding no cost, time and complexity thus making them feasible for industrial applications.


© The Author(s), under exclusive licence to Springer Nature B.V. 2022

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