Towards a uniform precracking procedure for fracture toughness testing

Marc Scibetta, Enrico Lucon, Eric van Walle, Matti Valo

    Research outputpeer-review


    The precracking requirements for fracture toughness testing of metallic materials are investigated in this study. In addition, some experiments were performed in the transition region to quantify the consequences of violating these requirements. It is found that the different standards are not consistent. For most of the requirements some rationale can be found. Some theoretical developments were performed to justify the use of a fixed maximum stress intensity factor. This limit is tightly related to the fracture mechanism and to the fracture process zone. From an experimental point of view, a relatively limited effect of pracracking on the fracture toughness is found.
    Original languageEnglish
    Pages (from-to)287-296
    Number of pages10
    JournalInternational journal of fracture
    StatePublished - Oct 2002

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