Transferability properties of local approach modeling in the ductile to brittle transition region

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    Abstract

    Qualitative descriptive potential of local approach models for upper shelf and transition region has been well established. Models such as the Gurson-Tvergaard-Needleman and the Beremin model have been demonstrated to enable characterization of fracture phenomena over the entire transition regime. The foundation for consistent local approach characterization of material failure has been set, but quantitative application is still at developing stages. Current work addresses properties of a modified Beremin model in terms of material parameter consistency and transferability, which are taken as measures of performance with respect to quantitative applicability. Three-point bend specimen fracture toughness data of sizes 3*4*27 mm, 5*5*27 mm, 5*10*55 mm and 10*10*55 mm are simulated in the ductile to brittle transition region using finite element methods and inference of local approach parameters is performed using pointwise collocation and stochastic methods. The suitability of the calibration methods and overall model performance are evaluated and demonstrated.
    Original languageEnglish
    Title of host publicationPredictive Material Modeling
    Subtitle of host publicationCombining Fundamental Physics Understanding, Computational Methods and Empirically Observed Behavior
    PublisherAmerican Society for Testing and Materials ASTM
    Pages22-47
    Number of pages26
    ISBN (Electronic)978-0-8031-5490-2
    ISBN (Print)978-0-8031-3472-0
    DOIs
    Publication statusPublished - 2004
    MoE publication typeA4 Article in a conference publication
    EventSymposium on Predictive Material Modeling: Combining Fundamental Physics Understanding, Computational Methods and Empirically Observed Behavior - Dallas, United States
    Duration: 7 Nov 20018 Nov 2001

    Publication series

    SeriesASTM Selected Technical Papers
    Volume1429

    Conference

    ConferenceSymposium on Predictive Material Modeling: Combining Fundamental Physics Understanding, Computational Methods and Empirically Observed Behavior
    CountryUnited States
    CityDallas
    Period7/11/018/11/01

    Keywords

    • Beremin model
    • Brittle Fracture
    • Local Approach
    • Miniature Specimens
    • Transferability

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  • Cite this

    Laukkanen, A., Wallin, K., Nevasmaa, P., & Tähtinen, S. (2004). Transferability properties of local approach modeling in the ductile to brittle transition region. In Predictive Material Modeling: Combining Fundamental Physics Understanding, Computational Methods and Empirically Observed Behavior (pp. 22-47). American Society for Testing and Materials ASTM. ASTM Selected Technical Papers, Vol.. 1429 https://doi.org/10.1520/STP10659S