Influence of Yield Condition on the Accuracy of Earing Prediction for Steel Sheets

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Gösling, Marco^1

BILSTEIN GmbH and Co. KG, Im Weinhof 36, Hagen

D-58119, Germany^1

关键词: Input parameter;    Main parameters;    Material modelling;    Rolled sheets;    Rolling direction;    Steel grades;    Yield conditions;    Yield criteria;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032045/pdf
DOI  :  10.1088/1742-6596/734/3/032045

来源: IOP

【 摘 要 】

This paper is dealing with the material modelling of steel sheets and is focused on the input parameters for a correct earing prediction. The cause of earing is the anisotropy of the rolled sheet which is usually modelled by a yield criterion. In a first study earing predictions with the Hill'48 yield criterion and with the Barlat'2000 yield criterion are conducted for different steel grades between 200 and 800 MPa yield strength. A comparison of the results shows that the Barlat'2000 yield criterion leads in almost all cases to a better earing prediction. In a second study the measurements for the Barlat'2000 law were analysed, to find the main parameter influencing the accuracy in earing prediction. The results of this study show that it is not affected by the biaxial measurements, but by the yield strength in 45° regarding to rolling direction.