Toughening of thermoset composites using glass/polypropylene commingled stitching yarns

Erdem Selver, Prasad Potluri, Hom Dhakal*

*Corresponding author for this work

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Abstract

This paper investigates the damage resistance and tolerance of thermoset composite laminates stitched by glass and hybrid glass/polypropylene commingled yarns. Different impact energies (10–70 J) were applied to stitched composite laminates before compression after impact (CAI) tests were conducted. The results showed that, except for 70J, commingled yarn-stitched laminates absorbed more energy than glass-stitched laminates. Compression tests revealed that glass-stitched and commingled composites had, respectively, 2 % and 5 % higher compressive strengths than unstitched laminates. After being impacted to 10–70J energies, glass yarn stitched laminates kept 83-36 % of their compressive strength, while commingled yarn stitched laminates retained 73-40 %, showing that the commingled yarns were more efficient at higher energies. The study found that integrating plastically deformed fibres into hybrid stitching yarns increased energy absorption and composite fracture mechanism by encouraging fibre/matrix debonding, resulting in fewer fibre breakages.
Original languageEnglish
Article numbere41431
Number of pages14
JournalHeliyon
Volume11
Issue number1
Early online date26 Dec 2024
DOIs
Publication statusPublished - 15 Jan 2025

Keywords

  • Stitching
  • Impact damage tolerance
  • Compression after impact strength
  • Hybrid com-mingled yarns

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