Mesoscopic Criteria of Fracture for Advanced High-Strength Dual-Phase Steel Sheet

2021 jecet  
Dual-phase steel is generally used for structural parts on the automobiles. The Gurson-Tvergaard-Needlman (GTN) model is suitable for the tensile necking fracture failure of the dual-phase steel sheet. However, the prediction of the shear fracture of the dual-phase steel under low stress triaxiality has limitations. A modified GTN model suitable for any stress triaxiality, and a new fracture mesoscopic criterion is proposed to predict the process of dual-phase steel from shear fracture to
more » ... r fracture to tangential fracture, and finally tensile fracture and the effectiveness of the mesoscopic criteria is verified by the experiments and simulation.
doi:10.24214/jecet.c.10.1.01020 fatcat:wgspqg54yjdfnagoosqxij56fi