Fracture toughness testing in the ductile-brittle transition region

Kim Wallin

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Fracture toughness testing in the ductile-brittle transition regime is often problematic. In this region both constraint effects as well as ductile tearing will affect the brittle fracture probability. This causes the scatter to grow very large in the transition region. Up till now there has not existed any kind of reliable means of how to validate such data. In this paper a new method for validation is presented.

    Based on a theoretical cleavage fracture model, it is possible to evaluate the effect of ductile tearing on the cleavage fracture probability. When combining this model with the knowledge from finite element calculations of the plastic zone, it is not only possible to evaluate a minimum specimen size to obtain valid brittle fracture toughness results, but it is also possible to change the invalid results into valid results. It is also possible to describe the fracture probability of large specimens and structures from the results obtained with “invalid size” specimens.
    Original languageEnglish
    Title of host publicationProceedings of the 7th International Conference on Fracture (ICF7)
    Subtitle of host publicationBrittle Fracture, Ductile Fracture, Dynamic Fracture
    EditorsK. Salama, K. Ravi-Chandar, D.M.R. Taplin, P. Rama Rao
    PublisherPergamon Press
    ISBN (Print)978-0-08-034341-9
    Publication statusPublished - 1989
    MoE publication typeA4 Article in a conference publication
    Event7th International Conference on Fracture (ICF7) - Houston, United States
    Duration: 20 Mar 198924 Mar 1989


    Conference7th International Conference on Fracture (ICF7)
    Country/TerritoryUnited States


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