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Simulation of micromechanical behavior of polycrystals: Finite elements versus fast Fourier transforms

 
: Prakash, A.; Lebensohn, R.A.

:
Preprint urn:nbn:de:0011-n-1063076 (2.5 MByte PDF)
MD5 Fingerprint: d3ba9bf8f8a4987ec036faf384e6a5b4
Created on: 5.3.2011


Modelling and simulation in materials science and engineering 17 (2009), No.6, Art. 064010, 16 pp.
ISSN: 0965-0393
Symposium on Multiscale Modeling of Microstructure Evolution in Materials <2008, Tallahassee/Fla.>
International Conference on Multiscale Materials Modeling (MMM) <4, 2008, Tallahassee/Fla.>
English
Journal Article, Conference Paper, Electronic Publication
Fraunhofer IWM ()
micromechanic; crystal plasticity; full-field simulation; fast algorithm; fourier transform

Abstract
In this work, we compare finite element and fast Fourier transform approaches for the prediction of the micromechanical behavior of polycrystals. Both approaches are full-field approaches and use the same visco-plastic single crystal constitutive law. We investigate the texture and the heterogeneity of the inter- and intragranular stress and strain fields obtained from the two models. Additionally, we also look into their computational performance. Two cases-rolling of aluminum and wire drawing of tungsten-are used to evaluate the predictions of the two models. Results from both the models are similar, when large grain distortions do not occur in the polycrystal. The finite element simulations were found to be highly computationally intensive, in comparison with the fast Fourier transform simulations.

: http://publica.fraunhofer.de/documents/N-106307.html