Numéro |
J. Phys. IV France
Volume 105, March 2003
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Page(s) | 139 - 147 | |
DOI | https://doi.org/10.1051/jp4:20030181 |
J. Phys. IV France 105 (2003) 139
DOI: 10.1051/jp4:20030181
Micromechanical modeling of plastic anisotropy and strain induced phase transformation in dual-elastoplastic phase materials
F. Lani, Q. Furnémont, P.J. Jacques, F. Delannay and T. PardoenUniversité Catholique de Louvain (UCL), Département des Sciences des Matériaux et des Procédés, Unité de Physico-Chimie et Ingénierie des Matériaux, place Sainte-Barbe 2, 1348 Louvain-la-Neuve, Belgium
Abstract
A micromechanical model for dual phase elastoplastic materials is developed using the equivalent
inclusion theory and a mean field approach. The model is written in the framework of the J
2 deformation theory for
ellipsoïdal inclusions. Two applications have been addressed in this paper: i) the shape induced anisotropy has
been investigated by calculating the anisotropy factor for geometrical configurations and loading conditions
corresponding to rolled plates containing elongated or penny-shape grains or inclusions; particular attention has
been paid to the strong dependence of the composite response on the coupling effect between the shape of the
inclusions and the stress state, ii) the model has been extended to account for the transformation of the reinforcing
phase during straining and applied to the case of a TRIP-assisted multiphase steel. A first validation of the model
is proposed by comparison with experimental measurements of overall stress-strain curves and transformation rate.
© EDP Sciences 2003