FE-modelling of ice failure load during ship bow indentation into multi-year ice

    Research output: Book/ReportReport

    Abstract

    The report presents the results of numerical studies of ice failure load caused by a ship bow penetrating into a large multi-year ice floe. Ice crushing and methods available for constitutive modelling of ice are discussed. The applicability of different material models in commercial FE-codes are studied. Different failure criteria are presented and fitted into a set of multi-year ice strength test results. An FE-model of the ice block including ship bow imprint is constructed. Both linear elastic and linear elastic-ideally plastic material models are applied to the ice block with several loading and boundary conditions. The linear elastic-ideally plastic model is calculated with von Mises failure criterion and the associated flow rule. The calculated results are compared with the existing data from fullscale ship ice trials. Also an attempt to apply strain softening in the nonlinear model is made in order to take into account the reduced load-carrying capacity of ice after the initial failure.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages60
    ISBN (Print)951-38-3842-0
    Publication statusPublished - 1991
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
    Number725
    ISSN0358-5077

    Fingerprint

    indentation
    ice
    modeling
    plastic
    ship
    crushing
    softening
    carrying capacity
    boundary condition

    Keywords

    • mathematical models
    • ice
    • icebreakers
    • ice breakup
    • ice disintegration
    • mechanical properties
    • fracture properties
    • brittleness
    • breaking load
    • failure
    • breaking
    • elastic properties
    • elastic theory
    • plastic theory
    • ships

    Cite this

    Liukkonen, S., & Kivimaa, S. (1991). FE-modelling of ice failure load during ship bow indentation into multi-year ice. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 725
    Liukkonen, Sauli ; Kivimaa, Seppo. / FE-modelling of ice failure load during ship bow indentation into multi-year ice. Espoo : VTT Technical Research Centre of Finland, 1991. 60 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 725).
    @book{aa32ebea711a45eb91b191a985b31e85,
    title = "FE-modelling of ice failure load during ship bow indentation into multi-year ice",
    abstract = "The report presents the results of numerical studies of ice failure load caused by a ship bow penetrating into a large multi-year ice floe. Ice crushing and methods available for constitutive modelling of ice are discussed. The applicability of different material models in commercial FE-codes are studied. Different failure criteria are presented and fitted into a set of multi-year ice strength test results. An FE-model of the ice block including ship bow imprint is constructed. Both linear elastic and linear elastic-ideally plastic material models are applied to the ice block with several loading and boundary conditions. The linear elastic-ideally plastic model is calculated with von Mises failure criterion and the associated flow rule. The calculated results are compared with the existing data from fullscale ship ice trials. Also an attempt to apply strain softening in the nonlinear model is made in order to take into account the reduced load-carrying capacity of ice after the initial failure.",
    keywords = "mathematical models, ice, icebreakers, ice breakup, ice disintegration, mechanical properties, fracture properties, brittleness, breaking load, failure, breaking, elastic properties, elastic theory, plastic theory, ships",
    author = "Sauli Liukkonen and Seppo Kivimaa",
    year = "1991",
    language = "English",
    isbn = "951-38-3842-0",
    series = "Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports",
    publisher = "VTT Technical Research Centre of Finland",
    number = "725",
    address = "Finland",

    }

    Liukkonen, S & Kivimaa, S 1991, FE-modelling of ice failure load during ship bow indentation into multi-year ice. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 725, VTT Technical Research Centre of Finland, Espoo.

    FE-modelling of ice failure load during ship bow indentation into multi-year ice. / Liukkonen, Sauli; Kivimaa, Seppo.

    Espoo : VTT Technical Research Centre of Finland, 1991. 60 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 725).

    Research output: Book/ReportReport

    TY - BOOK

    T1 - FE-modelling of ice failure load during ship bow indentation into multi-year ice

    AU - Liukkonen, Sauli

    AU - Kivimaa, Seppo

    PY - 1991

    Y1 - 1991

    N2 - The report presents the results of numerical studies of ice failure load caused by a ship bow penetrating into a large multi-year ice floe. Ice crushing and methods available for constitutive modelling of ice are discussed. The applicability of different material models in commercial FE-codes are studied. Different failure criteria are presented and fitted into a set of multi-year ice strength test results. An FE-model of the ice block including ship bow imprint is constructed. Both linear elastic and linear elastic-ideally plastic material models are applied to the ice block with several loading and boundary conditions. The linear elastic-ideally plastic model is calculated with von Mises failure criterion and the associated flow rule. The calculated results are compared with the existing data from fullscale ship ice trials. Also an attempt to apply strain softening in the nonlinear model is made in order to take into account the reduced load-carrying capacity of ice after the initial failure.

    AB - The report presents the results of numerical studies of ice failure load caused by a ship bow penetrating into a large multi-year ice floe. Ice crushing and methods available for constitutive modelling of ice are discussed. The applicability of different material models in commercial FE-codes are studied. Different failure criteria are presented and fitted into a set of multi-year ice strength test results. An FE-model of the ice block including ship bow imprint is constructed. Both linear elastic and linear elastic-ideally plastic material models are applied to the ice block with several loading and boundary conditions. The linear elastic-ideally plastic model is calculated with von Mises failure criterion and the associated flow rule. The calculated results are compared with the existing data from fullscale ship ice trials. Also an attempt to apply strain softening in the nonlinear model is made in order to take into account the reduced load-carrying capacity of ice after the initial failure.

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    KW - ice

    KW - icebreakers

    KW - ice breakup

    KW - ice disintegration

    KW - mechanical properties

    KW - fracture properties

    KW - brittleness

    KW - breaking load

    KW - failure

    KW - breaking

    KW - elastic properties

    KW - elastic theory

    KW - plastic theory

    KW - ships

    M3 - Report

    SN - 951-38-3842-0

    T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports

    BT - FE-modelling of ice failure load during ship bow indentation into multi-year ice

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    ER -

    Liukkonen S, Kivimaa S. FE-modelling of ice failure load during ship bow indentation into multi-year ice. Espoo: VTT Technical Research Centre of Finland, 1991. 60 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 725).