Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading

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

    Abstract

    In order to evaluate the mixed-mode fracture behavior of elastic-plastic metallic materials, experimental tests and numerical calculations were carried out. Since the transition of fracture toughness between opening and in-plane shear modes with ductile materials is a question of controversy, single-edge notched bend (SENB) specimens were subjected to asymmetric four-point bending (ASFPB) to provide various mode portions using four materials: A533B pressure vessel steel, F82H ferritic stainless steel, sensitized AISI 304 austenitic stainless steel and CuAl25 copper alloy. Fracture resistance curves were determined and fractographical studies performed. Numerical studies focused on determining the J-integral and stress intensity factor (SIF) solutions for the experimental programme and the Gurson-Tvergaard constitutive model was used to simulate continuum features of the fracture process. The results demonstrate that mode II fracture toughness of ductile metallic materials can be significantly lower than mode I fracture toughness. Studies of the micromechanical aspects of fracture demonstrate the factors and variables responsible for the behavior noted in this investigation.
    Original languageEnglish
    Title of host publicationRATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants
    Subtitle of host publicationSynthesis of achievements 1995-1998
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages45-75
    ISBN (Electronic)951-38-5264-4
    ISBN (Print)951-38-5263-6
    Publication statusPublished - 1998
    MoE publication typeA4 Article in a conference publication
    EventRATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants: Synthesis of achievements 1995−1998 - Espoo, Finland
    Duration: 7 Dec 19987 Dec 1998

    Publication series

    SeriesVTT Symposium
    Number190
    ISSN0357-9387

    Conference

    ConferenceRATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants
    CountryFinland
    CityEspoo
    Period7/12/987/12/98

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  • Cite this

    Laukkanen, A. (1998). Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading. In RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants: Synthesis of achievements 1995-1998 (pp. 45-75). VTT Technical Research Centre of Finland. VTT Symposium, No. 190 http://www.vtt.fi/inf/pdf/symposiums/1998/S190.pdf