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Journal of Materials Science

, Volume 30, Issue 6, pp 1409–1419 | Cite as

Deformation micromechanics in model carbon fibre-reinforced composites

Part I The single-fibre pull-out test
  • X. H. Gu
  • R. J. Young
  • R. J. Day
Papers

Abstract

Raman spectroscopy has been used to study the deformation micromechanics of the single-fibre pull-out test for a carbon fibre/epoxy resin system using surface-treated and untreated versions of the same type of PAN-based fibre. It has been possible to determine the detailed strain distribution along embedded fibres and it has been found that it varies with the level of strain in the fibre outside the resin block. The variation of interfacial shear stress along the fibre/matrix interface has been determined using the balance of forces equilibrium and this has been compared with the single values of interfacial shear strength determined from conventional pull-out analyses. It has been demonstrated that it is possible to identify situations where the interface is well-bonded, partially debonded or fully debonded and also to follow the failure mechanisms in detail. It has been found that the level of interfacial adhesion is better for the surface-treated fibre and that, for the untreated fibre, interfacial failure takes place by the cohesive failure of a weakly-bonded surface skin that appears to be removed by the surface pretreatment process.

Keywords

Shear Strength Interfacial Shear Interfacial Shear Stress Interfacial Shear Strength Interfacial Failure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • X. H. Gu
    • 1
  • R. J. Young
    • 1
  • R. J. Day
    • 1
  1. 1.Manchester Materials Science CentreUMIST/University of ManchesterManchesterUK

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