On a meso-elstoplastic constitutive equation witb application lo deformation-induced anisolropy of a polycrystalline aggregate

Hong-Qiu Liu; K. Hutter

On a meso-elstoplastic constitutive equation witb application lo deformation-induced anisolropy of a polycrystalline aggregate

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Hong-Qiu Liu Institute of Mechanics, China Academy of Sciences, China
K. Hutter Institute of Mechanics, Technische Hochschule Darmstadt, Germany

Abstract

Based on a 3-D meso-materail model of a polycrystalline aggregate, an elastoplastic constitutive equation for finite deformation is derived. The emphasis is focused on discussing the anisotropy induced by the heterogeneity in the material properties due to a complex deformation history, as well as re-orientation of the crystals or the variation of the micro-structure due to finite deformation. The theoretical predictions are in good agreement with experimental results.

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On a meso-elstoplastic constitutive equation witb application lo deformation-induced anisolropy of a polycrystalline aggregate

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