Damage work as ductile fracture criterion

Rachid Chaouadi, P. De Meester, Willy Vandermeulen

    Research outputpeer-review


    This paper treats the ductile failure initiation in circumferentially-notched tension specimens and explores the local damage model that is able to represent the continuous gegradation of the deforming material. With the aid of finite element calculations, the notched specimes have been simulated numerically and the whole strain-stress history for each geometry derived. This allows to determine the evolution of strain-stress fields until fracture occurs. Two damage models were evaluated: the Rice and Tracey cavity growth model and a model which combines the latter with the plastic strain work, to derive an intrinsic parameter called 'damage work'. These models could predict the location where the crack will initiate as well as the crack initiation step which is reached for a relatively constant value of the critical damage.
    Original languageEnglish
    Pages (from-to)155-164
    Number of pages10
    JournalInternational journal of fracture
    StatePublished - Mar 1994

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