Three techniques of interfacial bond strength estimation from direct observation of crack initiation and propagation in polymer-fibre systems

E. Pisanova, S. Zhandarov, E. Mäder, Ishak Ahmad, R. J. Young

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

Three techniques of bond strength determination in micromechanical tests-fibre strain profile analysis by means of Raman spectroscopy, `kink' force determination in a traditional pull-out test, and crack length monitoring in a microbond test - were used for investigation of interfacial debonding in epoxy-glass fibre and epoxy-aramid fibre systems. Crack propagation was characterized by local interfacial parameters - critical energy release rate, Gic, and ultimate interfacial shear strength (IFSS), τult. The comparison of the results showed good agreement both between different techniques and between stress-based and energy-based failure criteria. Sizing of glass fibres caused more pronounced variations in the IFSS than for aramid fibres due to different interfacial failure patterns. The strength of `real' epoxy-glass composites with sized and unsized fibres correlates well with the bond strength determined from the micromechanical tests.

Original languageEnglish
Pages (from-to)435-443
Number of pages9
JournalComposites Part A: Applied Science and Manufacturing
Volume32
Issue number3-4
DOIs
Publication statusPublished - Mar 2001
Externally publishedYes

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Aramid fibers
Crack initiation
Shear strength
Glass fibers
Crack propagation
Polymers
Fibers
Energy release rate
Bond strength (materials)
Debonding
Raman spectroscopy
Cracks
Glass
Monitoring
Composite materials
Kevlar Aramid fibers
fiberglass
Microbond

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Three techniques of interfacial bond strength estimation from direct observation of crack initiation and propagation in polymer-fibre systems. / Pisanova, E.; Zhandarov, S.; Mäder, E.; Ahmad, Ishak; Young, R. J.

In: Composites Part A: Applied Science and Manufacturing, Vol. 32, No. 3-4, 03.2001, p. 435-443.

Research output: Contribution to journalArticle

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