On low cycle fatigue in metal matrix composites

Thomas Ø Pedersen, Viggo Tvergaard

    Research output: Contribution to journalJournal articlepeer-review

    Abstract

    A numerical cell model analysis is used to study the development of fatigue damage in aluminium reinforced by aligned, short SiC fibres. The material is subjected to cyclic loading with either stress control or strain control, and the matrix material is represented by a cyclic plasticity model, in which continuum damage mechanics is incorporated to model fatigue damage evolution. This material model uses a superposition of kinematic and isotropic hardening, and is able to account for the Bauschinger effect as well as ratchetting, mean stress relaxation, and cyclic hardening or softening. The cell model represents a material with transversely staggered fibres. With focus on low cyclic fatigue, the effect of different fibre aspect ratios, different triaxial stress states, and balanced as well as unbalanced cyclic loading is studied.
    Original languageEnglish
    JournalInternational Journal of Damage Mechanics
    Volume9
    Issue number2
    Pages (from-to)154-173
    ISSN1056-7895
    DOIs
    Publication statusPublished - 2000

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