Re-evaluation of thermal shock experiment results based on the VTT approach for statistical treatment of fracture toughness data

Kim Wallin

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    One important step in fracture mechanical research has been thermal shock experiments (TSE). The TSEs are exceptional because many of them had extremely long crack fronts. As a trend, the TSE initiation fracture toughness results form a lower bound to the small specimen data used for material characterization. Presently, work is under way to produce an ASTM testing standard for fracture toughness testing in the transition region. The standard is based on the VTT approach for statistical treatment of fracture toughness data. Key components in the VTT approach are statistical expressions for describing the data scatter and for predicting a specimens size effect, and an expression for the fracture toughness temperature dependence. In order to examine the validity of the statistical size effect assumption, the TSEs were reevaluated with the VTT approach. For all the TSEs investigated, the application of the statistical size correction has had the effect of bringing the material characterization data in agreement with the actual TSE results. Furthermore, the application of a statistically defined size-corrected lower bound toughness estimate, based on the small specimen material characterization data and the master curve, yield a conservative, but realistic, estimate of the TSE failure behaviour.

    Original languageEnglish
    Pages (from-to)205 - 218
    Number of pages14
    JournalNuclear Engineering and Design
    Volume174
    Issue number3
    DOIs
    Publication statusPublished - 1997
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    fracture toughness
    thermal shock
    Thermal shock
    fracture strength
    Fracture toughness
    evaluation
    size effect
    experiment
    Experiments
    Testing
    toughness
    estimates
    Toughness
    cracks
    Cracks
    trends
    crack
    temperature dependence
    curves
    material

    Cite this

    @article{31af2a5d3f3b4b5eb4574df7cb3195b8,
    title = "Re-evaluation of thermal shock experiment results based on the VTT approach for statistical treatment of fracture toughness data",
    abstract = "One important step in fracture mechanical research has been thermal shock experiments (TSE). The TSEs are exceptional because many of them had extremely long crack fronts. As a trend, the TSE initiation fracture toughness results form a lower bound to the small specimen data used for material characterization. Presently, work is under way to produce an ASTM testing standard for fracture toughness testing in the transition region. The standard is based on the VTT approach for statistical treatment of fracture toughness data. Key components in the VTT approach are statistical expressions for describing the data scatter and for predicting a specimens size effect, and an expression for the fracture toughness temperature dependence. In order to examine the validity of the statistical size effect assumption, the TSEs were reevaluated with the VTT approach. For all the TSEs investigated, the application of the statistical size correction has had the effect of bringing the material characterization data in agreement with the actual TSE results. Furthermore, the application of a statistically defined size-corrected lower bound toughness estimate, based on the small specimen material characterization data and the master curve, yield a conservative, but realistic, estimate of the TSE failure behaviour.",
    author = "Kim Wallin",
    year = "1997",
    doi = "10.1016/S0029-5493(97)00133-7",
    language = "English",
    volume = "174",
    pages = "205 -- 218",
    journal = "Nuclear Engineering and Design",
    issn = "0029-5493",
    publisher = "Elsevier",
    number = "3",

    }

    Re-evaluation of thermal shock experiment results based on the VTT approach for statistical treatment of fracture toughness data. / Wallin, Kim.

    In: Nuclear Engineering and Design, Vol. 174, No. 3, 1997, p. 205 - 218.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Re-evaluation of thermal shock experiment results based on the VTT approach for statistical treatment of fracture toughness data

    AU - Wallin, Kim

    PY - 1997

    Y1 - 1997

    N2 - One important step in fracture mechanical research has been thermal shock experiments (TSE). The TSEs are exceptional because many of them had extremely long crack fronts. As a trend, the TSE initiation fracture toughness results form a lower bound to the small specimen data used for material characterization. Presently, work is under way to produce an ASTM testing standard for fracture toughness testing in the transition region. The standard is based on the VTT approach for statistical treatment of fracture toughness data. Key components in the VTT approach are statistical expressions for describing the data scatter and for predicting a specimens size effect, and an expression for the fracture toughness temperature dependence. In order to examine the validity of the statistical size effect assumption, the TSEs were reevaluated with the VTT approach. For all the TSEs investigated, the application of the statistical size correction has had the effect of bringing the material characterization data in agreement with the actual TSE results. Furthermore, the application of a statistically defined size-corrected lower bound toughness estimate, based on the small specimen material characterization data and the master curve, yield a conservative, but realistic, estimate of the TSE failure behaviour.

    AB - One important step in fracture mechanical research has been thermal shock experiments (TSE). The TSEs are exceptional because many of them had extremely long crack fronts. As a trend, the TSE initiation fracture toughness results form a lower bound to the small specimen data used for material characterization. Presently, work is under way to produce an ASTM testing standard for fracture toughness testing in the transition region. The standard is based on the VTT approach for statistical treatment of fracture toughness data. Key components in the VTT approach are statistical expressions for describing the data scatter and for predicting a specimens size effect, and an expression for the fracture toughness temperature dependence. In order to examine the validity of the statistical size effect assumption, the TSEs were reevaluated with the VTT approach. For all the TSEs investigated, the application of the statistical size correction has had the effect of bringing the material characterization data in agreement with the actual TSE results. Furthermore, the application of a statistically defined size-corrected lower bound toughness estimate, based on the small specimen material characterization data and the master curve, yield a conservative, but realistic, estimate of the TSE failure behaviour.

    U2 - 10.1016/S0029-5493(97)00133-7

    DO - 10.1016/S0029-5493(97)00133-7

    M3 - Article

    VL - 174

    SP - 205

    EP - 218

    JO - Nuclear Engineering and Design

    JF - Nuclear Engineering and Design

    SN - 0029-5493

    IS - 3

    ER -