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A robust identification protocol of flow curve adjusting parameters using uniaxial tensile curve
LEMOINE Xavier, MUNIER Rémi, BELLUT Xavier
download PDFAbstract. ArcelorMittal is constantly developing new steel grades to enable the automotive industry to offer safer, lighter, and more environmentally friendly vehicles. These new grades include advanced high-strength steels (AHSS) and Ultra High Strength steels (UHSS) having for some of them lower uniform elongation (UE) than conventional drawing steels. This particularity needs to be considered for an accurate formability prediction in sheet forming numerical simulations. One of these difficulties is the effect of the relatively low uniform elongation on the identification of the parameters of the isotropic hardening model. Various experimental tests can be used to reach the large plastic deformation (hydraulic bulge test, stack compression test, shear test, torsion test or plane strain compression test). The identification protocol of ArcelorMittal for hardening models is based solely on stress-strain curves determined in uniaxial tension. The Exp_S hardening law (TU experimental values before UE%, Swift extension above) was validated by comparison with the stress-strain curves obtained from measurements of experimental tests reaching large strains.
Keywords
Large Strain, Steel, Hardening Curve, Formability
Published online 4/24/2024, 10 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: LEMOINE Xavier, MUNIER Rémi, BELLUT Xavier, A robust identification protocol of flow curve adjusting parameters using uniaxial tensile curve, Materials Research Proceedings, Vol. 41, pp 2210-2219, 2024
DOI: https://doi.org/10.21741/9781644903131-243
The article was published as article 243 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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