J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 87-93
A modified Johnson-Cook model for strain rates ranging from 10 to 105 sH. Couque1, R. Boulanger1 and F. Bornet2
1 Giat Industries, Division Munitions, 7 route de Guerry, 18023 Bourges, France
2 Eurosim-Mecalog, 27 avenue des Alliès, 25200 Montbéliard, France
Published online: 26 July 2006
A modified Johnson-Cook model is proposed to take into account the thermally activated and viscous regimes that can be easily integrated in numerical codes. The model was calibrated using experimental data generated at temperatures ranging from 23 to 1000C and strain rates ranging from 0.002 to s-1 and validated through numerical simulations of symmetric Taylor tests for a pure nickel and a high strength nickel alloy.
© EDP Sciences 2006