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Process-oriented Flow Curve Determination at Mechanical Joining

: Jäckel, Mathias; Coppieters, Sam; Vandermeiren, Nelis; Kraus, Christian; Drossel, Welf-Guntram; Miyake, Noa; Kuwabara, Toshihiko; Unruh, Klaus; Traphöner, Heinrich; Tekkaya, A Erman; Balan, Tudor

Volltext ()

Procedia manufacturing 47 (2020), S.368-374
ISSN: 2351-9789
International Conference on Material Forming (ESAFORM) <23, 2020, Cottbus>
Zeitschriftenaufsatz, Konferenzbeitrag, Elektronische Publikation
Fraunhofer IWU ()
mechanical joining; material characterization; numerical simulation

The accuracy of numerical simulation models for forming processes depends highly on the method for the flow curve determination. Numerous experimental tests exist to identify the flow curves of sheet metals, each with certain characteristics regarding stress states and achievable strains. In this paper stress state analysis are presented for the mechanical joining techniques clinching as well as self-pierce riveting with semi-tubular rivet (SPR). Based on these findings flow curves for DC04 material are determined by selected experimental materials tests in order to compare the influence of the flow curve determination method on the accuracy of the process simulation models.