Characterization of residual stresses generated during inhomogeneous plastic deformation

T. Lorentzen, T. Faurholdt, B. Clausen, J. Danckert

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Residual stresses generated by macroscopic inhomogeneous plastic deformation are predicted by an explicit finite element (FE) technique. The numerical predictions are evaluated by characterizing the residual elastic strains by neutron diffraction using two different (hkl) reflections. Intergranular residual elastic strains between subsets of grains are predicted numerically and verified by neutron diffraction. Subsequently, the measured residual strain profiles in the test samples are modified by the intergranular strains and compared to the engineering predictions of the FE technique. Results compare well and verify the capability of the numerical technique as well as the possibilities of experimental validation using neutron diffraction. The presented experimental and numerical approach will subsequently be utilized for the evaluation of more complicated plastic deformation processes resembling forming operations.
    Original languageEnglish
    JournalJournal of Strain Analysis for Engineering Design
    Volume33
    Issue number3
    Pages (from-to)243-252
    ISSN0309-3247
    DOIs
    Publication statusPublished - May 1998

    Keywords

    • residual stresses
    • plastic deformation
    • FE technique
    • neutron diffraction

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