The effect of laser treatment on the secondary bonding behavior of carbon fibre composite

Mei Po Ho, Hon Wah Wai, Wai Yin Tam, Michael Leung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


Joining carbon fibre reinforced composites with adhesive are widely used in various applications including aircraft structures and commercialized leisure products. However, surface contaminations hinder the adhesion of the bonding. Laser based surface treatment on bonding surface is suggested to improve the adhesion on the surfaces for secondary bonding. In this paper, single lap shear tests of the samples show that the laser pre-treated samples lead to the higher joint strength then acetone cleaned reference samples and surface sanded samples. The failure mode changed from adhesion failure in the reference sample to cohesion mode in the laser treated samples. The structure, topography and morphology of the composite surfaces which were pre-treated with laser radiation were observed. A correlation between surface properties and adhesive bonding strength was investigated. It should be noted that the variation of the pulse frequency level of the laser treatment contributed to the fibre breakage and the epoxy removal level of the sample surfaces.

Original languageEnglish
Title of host publicationFunctional Materials
EditorsShu Yin, Alexander Pesin
PublisherTrans Tech Publications Ltd
Number of pages6
ISBN (Print)9783035716009
Publication statusPublished - 2020
EventInternational Conference on Functional Materials, ICFM 2019 - Sendai, Japan
Duration: 4 Sept 20196 Sept 2019

Publication series

NameKey Engineering Materials
Volume845 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795


ConferenceInternational Conference on Functional Materials, ICFM 2019


  • Carbon fibre reinforced composite
  • Laser treatment
  • Secondary bonding

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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