AHSS Shear Fracture Predictions Based on a Recently Developed Fracture Criterion

被引：10

作者：

Chen, Xiaoming ^{[1
]}

Shi, Ming F. ^{[1
]}

Shih, Hua-Chu ^{[1
]}

Luo, Meng ^{[2
]}

Wierzbicki, Tomasz ^{[2
]}

机构：

[1] US Steel Corp, Pittsburgh, PA 15219 USA

[2] MIT, Impact & Crashworthiness Lab, Cambridge, MA 02139 USA

来源：

SAE INTERNATIONAL JOURNAL OF MATERIALS AND MANUFACTURING | 2010年 / 3卷 / 01期

关键词：

D O I：

10.4271/2010-01-0988

中图分类号：

U [交通运输];

学科分类号：

08 ; 0823 ;

摘要：

One of the issues in stamping of advanced high strength steels (AHSS) is the stretch bending fracture on a sharp radius (commonly referred to as shear fracture). Shear fracture typically occurs at a strain level below the conventional forming limit curve (FLC). Therefore it is difficult to predict in computer simulations using the FLC as the failure criterion. A modified Mohr-Coulomb (M-C) fracture criterion has been developed to predict shear fracture. The model parameters for several AHSS have been calibrated using various tests including the butter-fly shaped shear test. In this paper, validation simulations are conducted using the modified (M-C) fracture criterion for a dual phase (DP) 780 steel to predict fracture in the stretch forming simulator (SFS) test and the bending under tension (BUT) test. Various deformation fracture modes are analyzed, and the range of usability of the criterion is identified. Good correlations have been found for failure prediction for tight radius stretch bending.

引用

页码：723 / 731

页数：9

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