Fracture Assessment of Reactor Circuit (FRAS): Advanced numerical fracture assessment methods

Anssi Laukkanen, Juha Kuutti, Tom Andersson, Päivi Karjalainen-Roikonen

    Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional


    The increase in computational capacity has made numerical analyses an indispensable tool in fracture mechanics. Many commercial structure analysis codes have implemented fracture mechanics routines easily available to the end-user. Traditional fracture mechanics analyses can now be carried out with relative ease and research in this field is focused on crack growth simulation methods and more detailed numerical material fracture mechanism modelling. Various numerical fracture assessment methods have been researched and applied during the course of the FRAS project. The cohesive zone modelling approach and crack tip remeshing approach are presented with numerical examples. The abilities of the extended finite element method for assessment of non-rectilinear crack propagation are demonstrated for a mixed-mode type of a crack analysis. Progress in modelling of effects of irradiation to ductile to brittle transition fracture toughness is presented. Research carried out in the project shows that the methods can be applied to model failure in nuclear applications but determining model parameters is essential in obtaining reliable results.
    Original languageEnglish
    Title of host publicationSAFIR2010
    Subtitle of host publicationThe Finnish Research Programme on Safety 2007-2010: Final Report
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    ISBN (Electronic)978-951-38-7690-6
    ISBN (Print)978-951-38-7689-0
    Publication statusPublished - 2011
    MoE publication typeD2 Article in professional manuals or guides or professional information systems or text book material

    Publication series

    SeriesVTT Tiedotteita - Research Notes


    • ProperTune


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