Transformation of localized necking of strain space into stress space for advanced high strength steel sheet

4th International Conference on Advanced Engineering and Technology

Nakwattanaset, Aeksuwat^1 ; Suranuntchai, Surasak^1

Department of Tool and Materials Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Pracha Uthit Road, Bangkok

10140, Thailand^1

关键词: Advanced high strength steel;    Forming limit curve;    Localized necking;    Sample geometry;    Shear fracture;    Strain and stress;    Yield criterion;    Yield function;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/317/1/012078/pdf
DOI  :  10.1088/1757-899X/317/1/012078

来源: IOP

【 摘 要 】

Normally, Forming Limit Curves (FLCs) can't explain for shear fracture better than Damage Curve, this article aims to show the experimental of Forming Limit Curve (FLC) for Advanced High Strength Steel (AHSS) sheets grade JAC780Y with the Nakazima forming test and tensile tests of different sample geometries. From these results, the Forming Limit Curve (strain space) was transformed to damage curve (stress space) between plastic strain and stress triaxiality. Therefore, Stress space transformed using by Hill-48 and von-Mises yield function. This article shows that two of these yield criterions can use in the transformation.