Implications of nonlinear mismatch in fracture of bimetallic interfaces

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    Fracture mechanics and local approach analyses are carried out on copper alloy to stainless steel joints produced by hot isostatic pressing (HIP) and respective base materials. Experiments are performed with fatigue precracked miniature single-edge notched bend (SENB) specimens at room and elevated temperatures in order to investigate the combined effects of linear and nonlinear mismatch on the fracture resistance of a bimaterial metallic interface. Characterization of near crack tip conditions is executed by applying local approach by porous metal plasticity with the modified Gurson model. Numerical results were interpreted with respect to scaling of the J-integral and the rates of damage accumulation as dependent on differences in material properties. The increase of nonlinear mismatch was found to severily augment the damage rates at near crack tip regions and to enforce the experimentally observed decreases of fracture resistance.
    Original languageEnglish
    Title of host publicationAdvances in Mechanical Behaviour, Plasticity and Damage
    Subtitle of host publicationproceedings of Euromat 2000
    EditorsD. Miannay, P. Costa, D. Francois, A. Pineau
    Place of PublicationAmsterdam
    PublisherElsevier
    Pages103 - 108
    Volume1
    ISBN (Print)0-08-042815-0
    Publication statusPublished - 2000
    MoE publication typeB3 Non-refereed article in conference proceedings
    EventEuropean Conference Euromat on Advances in Mechanical Behaviour, Plasticity and Damage, Euromat 2000: Euromat Topical - Tours, France
    Duration: 7 Nov 20009 Nov 2000

    Conference

    ConferenceEuropean Conference Euromat on Advances in Mechanical Behaviour, Plasticity and Damage, Euromat 2000
    CountryFrance
    CityTours
    Period7/11/009/11/00

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