Modeling Splitting and Spalling of Columnar Ice Compressed Biaxially: The Role of Crack Nucleation

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    Columnar ice exhibits three failure modes under increasing lateral confinement across the columns: splitting, Coulombic shear faulting, and spalling. Modeling of the splitting-to-spalling transition under increasing confined compression is considered here. Shear faulting is not considered. A three-dimensional crack nucleation model, based on a grain boundary sliding approach, is formulated to model brittle failure mechanisms under biaxial compression along and across the columns. The growth of the nucleated crack is based on the wing crack approach. The numerical results were in good agreement with experimental data for both across-column and along-column biaxial compression. The model shows that in columnar ice, crack nucleation preceded by sliding along tapered grain boundaries induces splitting-to-spalling transition under increasing confinement.

    Original languageEnglish
    Pages (from-to)3271-3287
    Number of pages16
    JournalJournal of Geophysical Research: Solid Earth
    Volume124
    Issue number4
    DOIs
    Publication statusPublished - 25 May 2019
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    spalling
    Spalling
    Ice
    nucleation
    ice
    crack
    Nucleation
    cracks
    Cracks
    Faulting
    compression
    grain boundary
    modeling
    sliding
    faulting
    grain boundaries
    shear
    brittle failure
    Grain boundary sliding
    failure modes

    Keywords

    • anisotropic damage
    • brittle failure
    • columnar ice
    • FE modeling
    • splitting
    • wing crack

    Cite this

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    title = "Modeling Splitting and Spalling of Columnar Ice Compressed Biaxially: The Role of Crack Nucleation",
    abstract = "Columnar ice exhibits three failure modes under increasing lateral confinement across the columns: splitting, Coulombic shear faulting, and spalling. Modeling of the splitting-to-spalling transition under increasing confined compression is considered here. Shear faulting is not considered. A three-dimensional crack nucleation model, based on a grain boundary sliding approach, is formulated to model brittle failure mechanisms under biaxial compression along and across the columns. The growth of the nucleated crack is based on the wing crack approach. The numerical results were in good agreement with experimental data for both across-column and along-column biaxial compression. The model shows that in columnar ice, crack nucleation preceded by sliding along tapered grain boundaries induces splitting-to-spalling transition under increasing confinement.",
    keywords = "anisotropic damage, brittle failure, columnar ice, FE modeling, splitting, wing crack",
    author = "Kari Kolari",
    year = "2019",
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    language = "English",
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    pages = "3271--3287",
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    issn = "2169-9313",
    publisher = "Wiley-Blackwell",
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    }

    Modeling Splitting and Spalling of Columnar Ice Compressed Biaxially : The Role of Crack Nucleation. / Kolari, Kari.

    In: Journal of Geophysical Research: Solid Earth, Vol. 124, No. 4, 25.05.2019, p. 3271-3287.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Modeling Splitting and Spalling of Columnar Ice Compressed Biaxially

    T2 - The Role of Crack Nucleation

    AU - Kolari, Kari

    PY - 2019/5/25

    Y1 - 2019/5/25

    N2 - Columnar ice exhibits three failure modes under increasing lateral confinement across the columns: splitting, Coulombic shear faulting, and spalling. Modeling of the splitting-to-spalling transition under increasing confined compression is considered here. Shear faulting is not considered. A three-dimensional crack nucleation model, based on a grain boundary sliding approach, is formulated to model brittle failure mechanisms under biaxial compression along and across the columns. The growth of the nucleated crack is based on the wing crack approach. The numerical results were in good agreement with experimental data for both across-column and along-column biaxial compression. The model shows that in columnar ice, crack nucleation preceded by sliding along tapered grain boundaries induces splitting-to-spalling transition under increasing confinement.

    AB - Columnar ice exhibits three failure modes under increasing lateral confinement across the columns: splitting, Coulombic shear faulting, and spalling. Modeling of the splitting-to-spalling transition under increasing confined compression is considered here. Shear faulting is not considered. A three-dimensional crack nucleation model, based on a grain boundary sliding approach, is formulated to model brittle failure mechanisms under biaxial compression along and across the columns. The growth of the nucleated crack is based on the wing crack approach. The numerical results were in good agreement with experimental data for both across-column and along-column biaxial compression. The model shows that in columnar ice, crack nucleation preceded by sliding along tapered grain boundaries induces splitting-to-spalling transition under increasing confinement.

    KW - anisotropic damage

    KW - brittle failure

    KW - columnar ice

    KW - FE modeling

    KW - splitting

    KW - wing crack

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    U2 - 10.1029/2018JB017032

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