Analysis of experimental factors in elastic-plastic small specimen mixed-mode I-II fracture mechanical testing

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    The quality of experimental fracture resistance testing results in mixed‐mode I‐II loading is more than questionable in several cases. This study describes efforts to gain consistent results with respect to mixed‐mode I‐II fracture resistance curve determination when working with elastic–plastic materials. The entire mixed‐mode I‐II field is evaluated, i.e. both numerical and experimental factors are considered the focus being on the asymmetric four‐point bend set‐up. Several error prone features are presented, and minimization of their effects on quantitative fracture resistance assessment considered. The results indicate that through a careful evaluation of the stages in experimental testing and numerical analysis valid, material characterizing, fracture toughness results can be obtained.
    Original languageEnglish
    Pages (from-to)193-206
    Number of pages14
    JournalFatigue & Fracture of Engineering Materials & Structures
    Issue number3
    Publication statusPublished - 2001
    MoE publication typeA1 Journal article-refereed



    • ductile fracture
    • mixed-mode I-II
    • mode II
    • toughness testing
    • ProperTune

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