Forming limit curves and forming limit stress curves for advanced high strength steels
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Publication Details
Author list: Panich S., Barlat F., Uthaisangsuk V., Suranuntchai S., Jirathearanat S.
Publisher: Trans Tech Publications
Publication year: 2014
Volume number: 773-774
Start page: 109
End page: 114
Number of pages: 6
ISBN: 9783037859216
ISSN: 0255-5476
eISSN: 1662-9752
Languages: English-Great Britain (EN-GB)
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Abstract
Experimental and numerical investigations using Forming Limit Curve (FLC) and Forming Limit Stress Curve (FLSC) were carried out for two Advanced High Strength Steel (AHSS) grades DP780 and TRIP780. The forming limit curves were experimentally determined by means of Nakazima stretching test. Then, both FLC and FLSC were analytically calculated on the basis of the Marciniack-Kuczinsky (M-K) model. The yield criteria Barlat2000 (Yld2000-2d) were employed in combination with the Swift and modified Voce strain hardening laws to describe plastic flow behavior of the AHS steels. Hereby, influence of the constitutive models on the numerically determined FLCs and FLSCs were examined. Obviously, the forming limit curves predicted by the M-K model applying the Yld2000-2d yield criterion and Swift hardening law could fairly represent the experimental limit curves. The FLSCs resulted from the experimental data and theoretical model were also compared. ฉ (2014) Trans Tech Publications, Switzerland.
Keywords
Forming limit curve, Forming limit stress curve
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