Aspects of cleavage fracture initiation: Relative influence of stress and strain

Kim Wallin (Corresponding Author), Anssi Laukkanen

    Research output: Contribution to journalArticleScientificpeer-review

    17 Citations (Scopus)

    Abstract

    Cleavage fracture initiation has generally been assumed to be controlled mainly by matrix stress. Recently, several different cleavage fracture models have been proposed, where also strain is included in the failure criterion. However, the proposals have been rather crude and unable to provide clearly improved fracture estimates. Here, the first two steps of cleavage fracture (particle failure and grain fracture) are examined in more detail. It is shown that both stress and strain are important for cleavage fracture initiation, but that strain mainly affects particle failure, whereas grain fracture is controlled by a pure Griffith criterion. The findings are important for the development of new cleavage fracture models and to the proper way of accounting for constraint.
    Original languageEnglish
    Pages (from-to)788-798
    Number of pages11
    JournalFatigue & Fracture of Engineering Materials & Structures
    Volume29
    Issue number9-10
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed

    Keywords

    • cleavage fracture
    • fracture
    • fracture mechanics
    • fatigue stress
    • stress
    • strain
    • ProperTune

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