[Une méthode d'homogénéisation sécante généralisée pour des matériaux polycristallins viscoplastiques en déformations imposées]
Des estimations relatives à l'homogénéisation de polycristaux viscoplastiques sont obtenues en appliquant la méthode de linéarisation sécante généralisée de Liu et Ponte Castañeda (2004) [1] au cas d'une relation constitutive où les taux de déformation sont des variables primaires. Les estimations obtenues sont particulièrement adaptées pour simuler des chargements mécaniques où les déformations sont imposées et où le matériau s'adoucit. La précision de ces estimations est évaluée au préalable dans le cas d'un système matériau modèle. Un bon accord est obtenu avec des estimations antérieures.
Homogenization estimates for viscoplastic polycrystals are derived by applying the generalized-secant linearization scheme of Liu and Ponte Castañeda (2004) [1] to the constitutive description with strain rates as primary variables. The resulting estimates are thus particularly suitable for simulating mechanical processes where deformations are imposed and where the material softens. Their accuracy is preliminarily assessed in the context of a model material system. Good agreement with previous estimates is found.
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Mot clés : Polycristaux, Plasticité, Homogénéisation, Adoucissement
Martín I. Idiart 1, 2 ; Pierre-Guy Vincent 3, 4
@article{CRMECA_2015__343_3_179_0, author = {Mart{\'\i}n I. Idiart and Pierre-Guy Vincent}, title = {A generalized-secant homogenization scheme for viscoplastic polycrystalline solids under imposed deformations}, journal = {Comptes Rendus. M\'ecanique}, pages = {179--186}, publisher = {Elsevier}, volume = {343}, number = {3}, year = {2015}, doi = {10.1016/j.crme.2014.12.006}, language = {en}, }
TY - JOUR AU - Martín I. Idiart AU - Pierre-Guy Vincent TI - A generalized-secant homogenization scheme for viscoplastic polycrystalline solids under imposed deformations JO - Comptes Rendus. Mécanique PY - 2015 SP - 179 EP - 186 VL - 343 IS - 3 PB - Elsevier DO - 10.1016/j.crme.2014.12.006 LA - en ID - CRMECA_2015__343_3_179_0 ER -
%0 Journal Article %A Martín I. Idiart %A Pierre-Guy Vincent %T A generalized-secant homogenization scheme for viscoplastic polycrystalline solids under imposed deformations %J Comptes Rendus. Mécanique %D 2015 %P 179-186 %V 343 %N 3 %I Elsevier %R 10.1016/j.crme.2014.12.006 %G en %F CRMECA_2015__343_3_179_0
Martín I. Idiart; Pierre-Guy Vincent. A generalized-secant homogenization scheme for viscoplastic polycrystalline solids under imposed deformations. Comptes Rendus. Mécanique, Volume 343 (2015) no. 3, pp. 179-186. doi : 10.1016/j.crme.2014.12.006. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2014.12.006/
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