A sheet metal necking formability diagram for nonlinear strain paths

Peter Christiansen*, Mikkel Ravn Boye Jensen, Grethe Winther

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    A new procedure for drawing forming limit curves is suggested. The theoretical basis for computing the forming limit curve due to diffuse necking, for nonlinear strain paths, is derived. The theoretically determined forming limit curve is compared with experimentally determined forming limits for both linear and bilinear strain paths. Reasonable agreement is observed. The procedure can also be utilized for nonlinear strain paths in general.
    Original languageEnglish
    JournalProceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
    Volume233
    Issue number7
    Pages (from-to)1287-1294
    Number of pages8
    ISSN1464-4207
    DOIs
    Publication statusPublished - 2019

    Keywords

    • Sheet metal forming
    • Formability diagram
    • Necking instability
    • Nonlinear strain path

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