CEL-analysis of punch shear tests to evaluate mechanical properties of ice rubble

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    Abstract

    Drifting sea ice ridge introduces often a major load scenario for the design of offshore structure. Major load contribution is presented by the consolidated layer and the underlying keel. Mechanical properties of the ridge keel are essential input to predict ridge loads.In a punch shear test, a circular platen of consolidated layer is first cut free from the surrounding ice field. Thereafter, the platen is pushed down to break the underlying keel. The measured load-displacement relationship can be used for the evaluation of rubble properties and also for the model validation. Ridge keel punch tests were carried out in the Bothnian Bay 1998-2003 with various platen diameters and keel thicknesses. This data has been earlier studied by the finite element simulations in Lagrangian framework. Presently, Coupled Eulerian-Lagrangian (CEL) framework was applied. The main benefit of CEL is that it enables robust modelling of large deformations due to material failure during the punch load. The ice rubble was modelled as a continuum with a shear-cap failure criterion, which describes both the shear failure and compaction. Parametric studies were carried out for two punch shear tests to determine the rubble properties. Main objective was to evaluate a suitable combination of the cohesion and friction angle which can be further utilized in ridge load analyses.
    Original languageEnglish
    Title of host publicationIAHR Ice Symposia proceedings
    PublisherInternational Association for Hydro-Environment Engineering and Research IAHR
    Publication statusPublished - 2016
    MoE publication typeA4 Article in a conference publication
    Event23rd IAHR International Symposium on Ice, IAHR ICE 2016 - Ann Arbor, United States
    Duration: 31 May 20173 Jun 2017
    Conference number: 23

    Conference

    Conference23rd IAHR International Symposium on Ice, IAHR ICE 2016
    Abbreviated titleIAHR-ICE 2016
    CountryUnited States
    CityAnn Arbor
    Period31/05/173/06/17
    OtherThe aim of the Symposium is on research and application of ice dynamics and thermodynamics in engineering and climate change.

    Keywords

    • ice rubble
    • ridge keel
    • ridge load
    • ice load
    • CEL
    • coupled eulerian-lagrangian method
    • bothnian bay

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  • Cite this

    Heinonen, J. (2016). CEL-analysis of punch shear tests to evaluate mechanical properties of ice rubble. In IAHR Ice Symposia proceedings International Association for Hydro-Environment Engineering and Research IAHR.