Research on Shear Fracture Criterion of Advanced High Strength Dual Phase Steels

Research Area:	Volume 9,Issue 5, Sept. 2020	Year:	2020
Type of Publication:	Article	Keywords:	Advanced High Strength Dual-Phase Steels, Shear Experiments, Stress Triaxiality, Tensile-bending Forming, Numerical Simulation
Authors:	Qiutao Fu Di Li Mengdi Li Kaidi Wang
Journal:	IJEIR	Volume:	9
Number:	5	Pages:	186-193
Month:	September
ISSN:	2277-5668

Abstract:	The universal ductile fracture criterion (such as the forming limit diagram (FLD)) cannot accurate predict the fracture of advanced high-strength dual-phase steels due to its unique shear fracture phenomenon. Based on the modified Mohr-Coulomb (MMC), this paper designs a series of high-strength Dual-Phase Steel (DP780) shear experiments, obtain the load-displacement curve and the stress triaxiality of the shear specimens at different angles, and the shear fracture strain-stress triaxiality curve is fitted to establish the shear fracture criterion, the curve model of shear fracture strain-stress triaxiality was further verified by the comparison between the tensile-bending test and the tensile-bending numerical simulation.
Full text: IJEIR_2476_FINAL.pdf

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