Abstract
An elastoviscoplastic finite element model of aluminum alloys is used to compare mechanical response among meshes formed with several different grain shapes. Tetrahedral elements are used to form grains of cubic, rhombic dodecahedral and truncated octahedral shape. The influence of the grain shape on the aggregate response is examined in terms of the stress variation and the aggregate elastic moduli. While elastic anisotropy in the bulk material is not found to be dependent on grain shape, consistent trends are observed in intragranular and intergranular stress distributions across these mesh definitions.
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