Investigation of the effect of the roughness-induced crack closure on the fatigue crack propagation behavior of hot-rolled steels under mixed-mode loading conditions

Ki Jeong Seo, Jeong Moo Lee, Byoung Ho Choi

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    It is reasonable to apply crack closure concepts, i.e. roughness-induced crack closure, to understand the crack propagation behavior under mixed mode loading conditions. In this paper, the characteristics of fatigue crack propagation under mixed-mode loading is studied using the concept of roughness-induced crack closure, and a model of the variation of the crack opening ratio is proposed based on multi-variable statistics. In addition, fracture surfaces are examined by C-scan and classified into four stages to quantify the effect of crack closure. The roughness parameter based on the highest intensity reveals the effect of roughness-induced crack closure on the fatigue crack propagation.

    Original languageEnglish
    Pages (from-to)264-269
    Number of pages6
    JournalMaterials Transactions
    Volume53
    Issue number2
    DOIs
    Publication statusPublished - 2012

    Keywords

    • C-scan
    • Crack opening ratio
    • Fatigue crack
    • Mixed-mode
    • Roughness-induced crack closure

    ASJC Scopus subject areas

    • General Materials Science
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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