11) et (3.12) sont choisis identiques sur tous les systèmes de glissement et pour tous les grains ,
la distance critique d'annihilation y c a peu d'effet sur le comportement mécanique pour de faibles déformations, et un effet important sur ce même comportement lorsque la déformation ,
orientation cristallographique et de la taille des grains sur le comportement mécanique des aciers IF1 et IF2 serontétudiés serontétudiés. Pour cela, des chargements de traction sont simulés jusqu'` a une déformation macroscopique de 10%. Les comportements macroscopiques en traction simple sont représentés sur la figure (3.12) ,
la prise en compte des longueurs internes peut s'effectuer en " discrétisant " les champs de déformation sur les grains ,
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