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- W3025670360 abstract "The ductile fracture in ferrous materials during cylinder upsetting was predicted using an ellipsoidal void model to show the validity of the proposed model. The simulation and experiment of cylinder upsetting were performed using five types of ferrous bars. Seven kinds of prestrains different in magnitude were introduced in the bars by drawing, and special attention was paid to the effect of the prestrain on ductile fracture during cylinder upsetting, which was scarcely paid attention to in earlier studies. A specimen for the plane-strain tensile test obtained from a bar was proposed to obtain a material constant on ductile fracture. Both in the simulation and in the experiment, with increasing the prestrain, the axial strain at fracture initiation monotonically increased, whereas the circumferential strain at fracture initiation monotonically decreased. The effect of the prestrain on the circumferential and axial strains at fracture initiation calculated using an ellipsoidal void model substantially agrees with that obtained experimentally, whereas the effect of the prestrain on the circumferential and axial strains at fracture initiation calculated using conventional ductile fracture criteria considerably differs from that obtained experimentally. Hence, the validity of the ellipsoidal void model was confirmed." @default.
- W3025670360 created "2020-05-21" @default.
- W3025670360 creator A5079077317 @default.
- W3025670360 date "2020-08-01" @default.
- W3025670360 modified "2023-09-23" @default.
- W3025670360 title "Predicting ductile fracture in ferrous materials during cylinder upsetting using an ellipsoidal void model" @default.
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- W3025670360 doi "https://doi.org/10.1016/j.tafmec.2020.102636" @default.
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