A 2-level homogenization approach was applied to the micro-mechanical modelling of the elasto-plasticity of polycrystalline materials during various strain-path changes. The model was tested by simulating the development of intragranular strains during different complex loads. Mechanical tests measurements were used as a reference in order to validate the model. The anisotropy of plastic deformation in relation to the evolution of the dislocation structure was analyzed. The results demonstrated the relevance of this approach for FCC polycrystals.

Prediction of Intragranular Strains in Metallic Polycrystals with a Two-Level Homogenisation Approach - Influence of Dislocation Microstructure on the Mechanical Behaviour. D.Gloaguen, M.François: Physica Status Solidi A, 2006, 203[8], 1940-53