Predicting ductile fracture in pure metals and alloys using notched tensile specimens by an ellipsoidal void model

[Display omitted] •Macroscopic ductile fracture is predicted using the microscopic ellipsoidal void model.•Models for a pure metal and those for an alloy are different.•Prestrain is naturally incorporated into the model.•Effects of curvature of the notch root and prestrain on the reduction in area are predicted.•Predicted reduction in area agrees with that in the experimental results. The ductile fracture of nonferrous pure metals and alloys during notch tensile testing was predicted using an ellipsoidal void model. Simulated and experimental tensile tests were performed using four types of nonferrous sheets and bars. Two magnitudes of prestrain were induced in the sheets by rolling and in the bars by drawing. Six notched sheet specimens and thirteen notched bar specimens with different notch-root radii were prepared. A void configuration and void shape for pure metals and those for alloys were assumed. The effects of the prestrain and notch-root radius on the reduction in area calculated agreed reasonably well with those obtained experimentally.