Transactions of FAMENA, Vol. 50 No. 1, 2026.
Izvorni znanstveni članak
https://doi.org/10.21278/TOF.501071424
The Temperature Dependency of the B-W Failure Criterion of Advanced High-Strength Dual-Phase Steel DP780
Yukuan Li
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255000, China
Di Li
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255000, China
*
Dongze Wu
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255000, China
Yiqun Wang
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255000, China
Shaoxun Liu
; Rongcheng Compaks New Energy Automobile Co., Ltd, Rongcheng 264300, China
Tao Wang
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255000, China
Xiaokun Wang
; School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255000, China
* Dopisni autor.
Sažetak
The Bao-Wierzbicki (B-W) criterion more accurately describes the fracture characteristics of steel under different stress states and provides a more precise prediction of the fracture of duplex steels. Taking DP780 as a research object, the relationship between stress triaxiality and fracture strain in the fracture region of dual-phase steel at different temperatures was investigated by uniaxial tensile, shear, and Nakazima tests combined with numerical simulations. A stress triaxiality-based fracture model (B-W fracture criterion) at different temperatures was obtained and its temperature dependence was studied. Finally, the reliability of the criterion was verified using the stretch-bending tests of U-shape parts. The fracture criterion can be employed to forecast the emergence of fractures in automotive components during the stamping processes. This enables designers to undertake virtual simulations of operational conditions, thereby facilitating the selection of optimal process parameters during production.
Ključne riječi
advanced high-strength dual-phase steel; B-W criterion; DP780; stress triaxiality; temperature dependence
Hrčak ID:
343603
URI
Datum izdavanja:
22.1.2026.
Posjeta: 367 *