Modeling of anisotropic plastic behavior of advanced high strength steel sheet TRIP 780
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Publication Details
Author list: Panich S., Uthaisangsuk V., Suranuntchai S., Jirathearanat S.
Publisher: Trans Tech Publications
Publication year: 2012
Volume number: 410
Start page: 232
End page: 235
Number of pages: 4
ISBN: 9783037853160
ISSN: 1022-6680
eISSN: 1662-8985
Languages: English-Great Britain (EN-GB)
Abstract
Anisotropic plastic behavior of advanced high strength steel sheet of grade TRIP780 (Transformation Induced Plasticity) was investigated using three different yield functions, namely, the von Mises's isotropic, Hill's anisotropic (Hill'48), and Barlat's anisotropic (Yld2000-2d) criterion. Uniaxial tensile and balanced biaxial test were conducted for the examined steel in order to characterize flow behavior and plastic anisotropy for different stress states. Especially, disk compression test was performed for obtaining balanced r-value. All these data were used to determine the anisotropic coefficients. As a result, yield stresses and r-values for different directions were calculated according to these yield criteria. The results were compared with experimental data. To verify the modelling accuracy, tensile tests of various notched samples were carried out and stress-strain distributions in the critical area were characterized. By this manner, the effect of stress triaxiality due to different notched shapes on the strain localization calculated by the investigated yield criteria could be studied.
Keywords
Anisotropy, Notched Samples, TRIP Steel, Yield Function
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