8th International Conference on Mehanical and Physical Behaviour of Materials under Dynamic Loading
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 87-93
DOI: 10.1051/jp4:2006134015
A modified Johnson-Cook model for strain rates ranging from 10
to 105 s
H. 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)
Abstract
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 1000
C 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