Issue |
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
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Page(s) | 435 - 441 | |
DOI | https://doi.org/10.1051/jp4:2006134067 | |
Published online | 26 July 2006 |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 435-441
DOI: 10.1051/jp4:2006134067
Finite element simulations of the Portevin–Le Chatelier effect in aluminium alloy
O.S. Hopperstad1, T. Børvik1, T. Berstad2 and A. Benallal31 Structural Impact Laboratory – SIMLab, Department of Structural Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
2 SINTEF Materials and Chemistry, 7465 Trondheim, Norway
3 Laboratoire de Mécanique et Technologie, LMT-Cachan, 61 avenue du Président-Wilson, 94235 Cachan Cedex, France
Published online: 26 July 2006
Abstract
Finite element simulations of the Portevin-Le Chatelier
effect in aluminium alloy 5083-H116 are presented and evaluated against
existing experimental results. The constitutive model of McCormick (1988)
for materials exhibiting negative steady-state strain-rate sensitivity is
incorporated into an elastic-viscoplastic model for large plastic
deformations and implemented in LS-DYNA for use with the explicit or
implicit solver. Axisymmetric tensile specimens loaded at different strain
rates are studied numerically, and it is shown that the model predicts the
experimental behaviour with reasonable accuracy; including serrated yielding
and propagating bands of localized plastic deformation along the gauge
length of the specimen at intermediate strain rates.
© EDP Sciences 2006