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Numerical Study of the Influence of Dislocation Microstructure on Metallic Materials Mechanical Behaviour

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Abstract:

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

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Periodical:

Materials Science Forum (Volumes 524-525)

Pages:

511-516

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.524-525.511

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Online since:

September 2006

Authors:

D. Gloaguen, Jamal Fajoui, Bruno Courant, Ronald Guillén

Keywords:

Dislocation, Intragranular Stresses, Plasticity, Self-Consistent Model

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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