Fracture mechanics-based estimation of fatigue lives of welded joints

R. Goyal, G. Glinka*

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    16 Citations (Scopus)

    Abstract

    The effects of the lack of penetration flaw and misalignment on fatigue life of cruciform welded joints made of low-alloy steel were studied experimentally and theoretically. It was found that two locations of fatigue fracture were possible under cyclic tension loading, depending on the relative magnitude of the misalignment. In the absence of misalignment, all fatigue failures occurred as a result of fatigue growth of cracks emanating from the weld root. In the presence of misalignment, fatigue life depended on the fatigue growth of cracks growing from the weld toe. It has been shown that the entire fatigue life can be modeled as a fatigue growth of cracks starting either from the weld toe or the weld root. The initial crack size was selected as a small crack characteristic for a given material, i.e., being dependent only on the material. The weight function method was used to calculate the required stress intensity factors.

    Original languageEnglish
    Pages (from-to)625-634
    Number of pages10
    JournalWelding in the World
    Volume57
    Issue number5
    DOIs
    Publication statusPublished - Sep 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Cruciform joints
    • Fatigue cracks
    • Fatigue strength
    • Fracture Mechanics
    • Weight function

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