True stress-strain relationship for finite element simulations of structural details under diffuse necking

Petr Hradil, Asko Talja

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

    Abstract

    The paper presents an automated numerical method for acquiring true stress-strain relationship from the material test results of high-strength steels. The model beyond uniform load is iterated to produce load-displacement relationship matching the experimental results re-calculated by finite element method. We have used this approach to evaluate coupon tests of high-strength grades S700 and S960, and extended the study to mild steels S275 and S355 for comparison. The results were validated against the tensile experiments of plates with central hole made from the same steel S960 as original coupons. The presented algorithm will serve as a basis for evaluation of ductility limits for different steel grades.
    Original languageEnglish
    Title of host publicationProceedings of The 13th Nordic Steel Construction Conference (NSCC-2015)
    EditorsMarkku Heinisuo, Jari Mäkinen
    PublisherTampere University of Technology
    Pages229-230
    ISBN (Electronic)978-952-15-3579-6
    ISBN (Print)978-952-15-3578-9
    Publication statusPublished - 2015
    EventNordic Steel Construction Conference 2015 - Tampere, Finland
    Duration: 23 Sep 201525 Sep 2015

    Conference

    ConferenceNordic Steel Construction Conference 2015
    CountryFinland
    CityTampere
    Period23/09/1525/09/15

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  • Cite this

    Hradil, P., & Talja, A. (2015). True stress-strain relationship for finite element simulations of structural details under diffuse necking. In M. Heinisuo, & J. Mäkinen (Eds.), Proceedings of The 13th Nordic Steel Construction Conference (NSCC-2015) (pp. 229-230). Tampere University of Technology.