Breakage and debonding of short brittle fibres among particulates in a metal matrix

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Abstract

The competition of failure by fibre cracking or decohesion of the fibre-matrix interface is analysed for aluminium reinforced by aligned, short SiC fibres. An axisymmetric unit-cell model containing a number of differently shaped fibres or particulates is used here to represent failure by debonding or fracture of a relatively long discontinuous fibre among particulates that do not fail. A cohesive zone model that accounts for normal separation as well as tangential separation is used to represent debonding, while fibre fracture is represented by a critical value of the average tensile stress on a cross-section. The effect of various distributions of different size fibres is investigated. (C) 2003 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalMaterials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing
Volume369
Issue number1-2
Pages (from-to)192-200
ISSN0921-5093
DOIs
Publication statusPublished - 24 Mar 2004

Keywords

  • unit-cell model
  • metal matrix composites
  • plasticity
  • fracture

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