Macro-scale modeling of finite strain viscoplasticity in irradiated F/M steels: a continuum thermodynamic framework

Roshan R. Rajakrishnan, Ermile Gaganidze, Dmitry Terentyev, Jarir Aktaa

    Research outputpeer-review


    The European reduced activation ferritic/martensitic steel Eurofer97 in irradiated states displays significant nonlinear material behavior involving irradiation hardening, loss of strain hardening, and uniform elongation, as well as irradiation-induced embrittlement. Nonlinear behavior of irradiated steel modeled on the continuum scale will help to estimate the maximum operating range of the irradiated components beyond the onset of localized plastic flow. In this work, a thermodynamic framework for modeling irradiation-influenced deformation is established based on irradiation defect density and a thermodynamically consistent finite strain formulation of an existing viscoplastic model using the Dual Variables concept is presented. The model is implemented in ABAQUS allowing the simulation of tensile tests conducted on irradiated and unirradiated materials which shows the model's ability to capture the post-yield and post-necking behavior observed in experiments up to ductile failure.
    Original languageEnglish
    Pages (from-to)521-543
    Number of pages23
    JournalContinuum Mechanics and Thermodynamics
    Issue number2
    StatePublished - Mar 2023

    ASJC Scopus subject areas

    • Mechanics of Materials
    • General Physics and Astronomy
    • General Materials Science

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