Comparison and analysis of experimental and virtual laboratory scale punch through tests

A. Polojärvi (Corresponding Author), J. Tuhkuri, Otto Korkalo

    Research output: Contribution to journalArticleScientificpeer-review

    24 Citations (Scopus)

    Abstract

    Laboratory scale punch through tests on floating rubble consisting of plastic blocks were conducted and simulated with a 3D discrete numerical model. The purpose was to analyse the experimental method and to validate the model. The motivation of using plastic blocks instead of ice was to simplify the interpretation of results as the plastic blocks do not freeze together. The indentor force and the lateral force induced by the rubble on one of the basin walls were recorded as a function of indentor penetration. Further, the experiments were recorded with a video camera and a motion tracking software was used to analyse the rubble deformation. The force records and deformation patterns from the experiments and simulations were in agreement. The evolution of the deformation patterns could be closely linked to the indentor force records, which demonstrates the need for the numerical model to correctly represent the rubble deformation. The experiments and the simulations showed, that the lateral force within the pile increased considerably during a punch through experiment. This makes the interpretation of punch through experiment results for material modelling challenging: the friction angle of the rubble can become overestimated making the punch through test unsuitable for achieving accurate values for friction angle. Consequently, no value for the rubble friction angle was derived here.
    Original languageEnglish
    Pages (from-to)11-25
    Number of pages14
    JournalCold Regions Science and Technology
    Volume81
    DOIs
    Publication statusPublished - 2012
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    friction
    plastic
    Friction
    Plastics
    experiment
    Experiments
    Numerical models
    Video cameras
    Piles
    simulation
    Ice
    pile
    penetration
    test
    comparison
    laboratory
    analysis
    software
    ice
    basin

    Keywords

    • Discrete element method
    • ice rubble
    • model scale experiments
    • numerical modelling
    • punch through tests

    Cite this

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    title = "Comparison and analysis of experimental and virtual laboratory scale punch through tests",
    abstract = "Laboratory scale punch through tests on floating rubble consisting of plastic blocks were conducted and simulated with a 3D discrete numerical model. The purpose was to analyse the experimental method and to validate the model. The motivation of using plastic blocks instead of ice was to simplify the interpretation of results as the plastic blocks do not freeze together. The indentor force and the lateral force induced by the rubble on one of the basin walls were recorded as a function of indentor penetration. Further, the experiments were recorded with a video camera and a motion tracking software was used to analyse the rubble deformation. The force records and deformation patterns from the experiments and simulations were in agreement. The evolution of the deformation patterns could be closely linked to the indentor force records, which demonstrates the need for the numerical model to correctly represent the rubble deformation. The experiments and the simulations showed, that the lateral force within the pile increased considerably during a punch through experiment. This makes the interpretation of punch through experiment results for material modelling challenging: the friction angle of the rubble can become overestimated making the punch through test unsuitable for achieving accurate values for friction angle. Consequently, no value for the rubble friction angle was derived here.",
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    author = "A. Poloj{\"a}rvi and J. Tuhkuri and Otto Korkalo",
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    language = "English",
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    Comparison and analysis of experimental and virtual laboratory scale punch through tests. / Polojärvi, A. (Corresponding Author); Tuhkuri, J.; Korkalo, Otto.

    In: Cold Regions Science and Technology, Vol. 81, 2012, p. 11-25.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Comparison and analysis of experimental and virtual laboratory scale punch through tests

    AU - Polojärvi, A.

    AU - Tuhkuri, J.

    AU - Korkalo, Otto

    PY - 2012

    Y1 - 2012

    N2 - Laboratory scale punch through tests on floating rubble consisting of plastic blocks were conducted and simulated with a 3D discrete numerical model. The purpose was to analyse the experimental method and to validate the model. The motivation of using plastic blocks instead of ice was to simplify the interpretation of results as the plastic blocks do not freeze together. The indentor force and the lateral force induced by the rubble on one of the basin walls were recorded as a function of indentor penetration. Further, the experiments were recorded with a video camera and a motion tracking software was used to analyse the rubble deformation. The force records and deformation patterns from the experiments and simulations were in agreement. The evolution of the deformation patterns could be closely linked to the indentor force records, which demonstrates the need for the numerical model to correctly represent the rubble deformation. The experiments and the simulations showed, that the lateral force within the pile increased considerably during a punch through experiment. This makes the interpretation of punch through experiment results for material modelling challenging: the friction angle of the rubble can become overestimated making the punch through test unsuitable for achieving accurate values for friction angle. Consequently, no value for the rubble friction angle was derived here.

    AB - Laboratory scale punch through tests on floating rubble consisting of plastic blocks were conducted and simulated with a 3D discrete numerical model. The purpose was to analyse the experimental method and to validate the model. The motivation of using plastic blocks instead of ice was to simplify the interpretation of results as the plastic blocks do not freeze together. The indentor force and the lateral force induced by the rubble on one of the basin walls were recorded as a function of indentor penetration. Further, the experiments were recorded with a video camera and a motion tracking software was used to analyse the rubble deformation. The force records and deformation patterns from the experiments and simulations were in agreement. The evolution of the deformation patterns could be closely linked to the indentor force records, which demonstrates the need for the numerical model to correctly represent the rubble deformation. The experiments and the simulations showed, that the lateral force within the pile increased considerably during a punch through experiment. This makes the interpretation of punch through experiment results for material modelling challenging: the friction angle of the rubble can become overestimated making the punch through test unsuitable for achieving accurate values for friction angle. Consequently, no value for the rubble friction angle was derived here.

    KW - Discrete element method

    KW - ice rubble

    KW - model scale experiments

    KW - numerical modelling

    KW - punch through tests

    U2 - 10.1016/j.coldregions.2012.04.008

    DO - 10.1016/j.coldregions.2012.04.008

    M3 - Article

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    SP - 11

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    JO - Cold Regions Science and Technology

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