Effects of particle plasticity characteristics on local interface stress in particle reinforced composite during uniaxial tension

H.M. Xu, G.Q. Wu, Wei Sha

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    For elastoplastic particle reinforced metal matrix composites, failure may originate from interface debonding between the particles and the matrix, both elastoplastic and matrix fracture near the interface. To calculate the stress and strain distribution in these regions, a single reinforcing particle axisymmetric unit cell model is used in this article. The nodes at the interface of the particle and the matrix are tied. The development of interfacial decohesion is not modelled. Finite element modelling is used, to reveal the effects of particle strain hardening rate, yield stress and elastic modulus on the interfacial traction vector (or stress vector), interface deformation and the stress distribution within the unit cell, when the composite is under uniaxial tension. The results show that the stress distribution and the interface deformation are sensitive to the strain hardening rate and the yield stress of the particle. With increasing particle strain hardening rate and yield stress, the interfacial traction vector and internal stress distribution vary in larger ranges, the maximum interfacial traction vector and the maximum internal stress both increase, while the interface deformation decreases. In contrast, the particle elastic modulus has little effect on the interfacial traction vector, internal stress and interface deformation.
    Original languageEnglish
    Pages (from-to)6140-6147
    Number of pages8
    JournalJournal of Materials Science
    Volume46
    Issue number18
    Early online date05 May 2011
    DOIs
    Publication statusPublished - Sep 2011

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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