Effect of surface treatment upon the pull-out behaviour of aramid fibres from epoxy resins

R. J. Young, D. J. Bannister, A. J. Cervenka, Ishak Ahmad

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A detailed study has been undertaken of the pull-out behaviour of aramid fibres with different surface characteristics from blocks of an epoxy resin matrix. The fibres employed had either no surface treatment (HM), a standard surface finish (HMF) or had been treated with a special epoxy-based adhesion-activating finish (HMA). The point-to-point variation of axial fibre strain along the fibres both inside and outside of the resin matrix has been determined from stress-induced Raman band shifts. This has enabled the distribution of interfacial shear stress along the fibre/matrix interface to be determined and, in combination with scanning electron microscope analysis of the specimens following pull-out testing, the failure mechanisms to be elucidated. It is found that pull out of the HM fibre takes place by a debond propagating along the fibre/matrix interface at a low level of interfacial shear stress. The HMF fibre showed better adhesion to the epoxy matrix with pull out occurring in a complex manner through both separation of the fibre skin and failure at the fibre/finish interface. No evidence of debonding was found for the HMA fibre and failure occurred by fracture of the fibre at the point where it entered the resin block.

Original languageEnglish
Pages (from-to)1939-1947
Number of pages9
JournalJournal of Materials Science
Volume35
Issue number8
DOIs
Publication statusPublished - 2000
Externally publishedYes

Fingerprint

Epoxy Resins
Aramid fibers
Epoxy resins
Surface treatment
Fibers
Shear stress
Kevlar Aramid fibers
Adhesion
Resins
Debonding
Skin
Electron microscopes

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Effect of surface treatment upon the pull-out behaviour of aramid fibres from epoxy resins. / Young, R. J.; Bannister, D. J.; Cervenka, A. J.; Ahmad, Ishak.

In: Journal of Materials Science, Vol. 35, No. 8, 2000, p. 1939-1947.

Research output: Contribution to journalArticle

Young, R. J. ; Bannister, D. J. ; Cervenka, A. J. ; Ahmad, Ishak. / Effect of surface treatment upon the pull-out behaviour of aramid fibres from epoxy resins. In: Journal of Materials Science. 2000 ; Vol. 35, No. 8. pp. 1939-1947.
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