Thermodynamic formulation of a material model for microcracking applied to creep damage

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    Abstract

    A Hookean material containing an increasing number of non-interacting microcracks is studied from the aspect of continuum thermodynamics. Rectilinear microcracks in a two-dimensional body are examined. The former model by Basista (2003) is enhanced to describe the response of microcracks to compression. Microcrack densities introduced here enter into the formulation of continuum thermodynamics as internal variables. The strong physical foundation of these internal variables makes them more attractive quantities for damage mechanics than variable damage, the physical background of which is sometimes unclear. The model is coded as an Abaqus VUMAT subroutine and applied to the creep of ice.
    Original languageEnglish
    Pages (from-to)1179-1184
    JournalProcedia Materials Science
    Volume3
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed
    EventEuropean Conference on Fracture - NTNU, Trondheim, Norway
    Duration: 30 Jun 20144 Jul 2014
    Conference number: 20

    Keywords

    • Abaqus VUMAT
    • Clausius-Duhem inequality
    • ice
    • material modelling
    • microcracking
    • specific Gibbs free energy
    • thermodynamics

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