Novel method for interlaminar reinforcement using polymer/fibre pins

E Archer, William Moses, Thomas Dooher, AT McIlhagger, Sean Duffy

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A common theme in the application of through-thickness reinforcement is the desire to minimize/eliminate any reduction in in-plane properties. In this work a novel method of reinforcement is introduced using a polymer/fibre pin. Similar in concept to the traditional metalworking process of riveting these pins are placed through the thickness with deliberate excess length. The application of heat and pressure deforms the exposed ends of the pin against the part surface. The resultant preform maintains its shape and may be re-formed with further heat and pressure with the reinforcement conforming to the desired shape. Samples manufactured using this method are tested under quasi-static tensile loading and show no significant change in properties due to the pin addition. Samples tested under mode 1 show further refinement of the manufacture method is required, with shallow pin angles resulting in sub-optimal performance.
Original languageEnglish
Article number116010
Number of pages10
JournalComposite Structures
Early online date1 Aug 2022
Publication statusPublished (in print/issue) - 15 Oct 2022

Bibliographical note

Funding Information:
This work was supported primarily by the Northern Ireland Department For the Economy (DFE). Additional assistance was provided by the Engineering and Physical Sciences Research Council (EPSRC) Future Composites Manufacturing Hub. In-Kind support was provided by Spirit AeroSystems (Formerly Bombardier Aviation).

Publisher Copyright:
© 2022 The Authors


  • Through thickness reinforcement
  • Tensile
  • Mode 1


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