Derivation of Path Independent Coupled Mix Mode Cohesive Laws from Fracture Resistance Curves

Stergios Goutianos

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A generalised approach is presented to derive coupled mixed mode cohesive laws described with physical parameters such as peak traction, critical opening, fracture energy and cohesive shape. The approach is based on deriving mix mode fracture resistance curves from an effective mix mode cohesive law at different mode mixities. From the fracture resistance curves, the normal and shear stresses of the cohesive laws can be obtained by differentiation. Since, the mixed mode cohesive laws are obtained from a fracture resistance curve (potential function), path independence is automatically satisfied. The effective mix mode cohesive law can have different shape and cohesive law parameters at different mode mixities so that the approach can be applied to various material failure models.
    Original languageEnglish
    JournalApplied Composite Materials
    Volume24
    Issue number4
    Pages (from-to)983-997
    ISSN0929-189X
    DOIs
    Publication statusPublished - 2016

    Keywords

    • Ceramics and Composites
    • Bridging laws
    • Cohesive laws
    • J Integral
    • Mixed mode
    • Potential function
    • Fracture toughness
    • Shear stress
    • Bridging law
    • J integral
    • Fracture

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