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Article Dans Une Revue Procedia Engineering Année : 2011

Prediction of the overall behavior of a 3D microstructure of austenitic steel by using FFT numerical scheme

Résumé

The present work investigates the mechanical response of a polycrystalline aggregate by the combined use of 3D X-ray di raction contrast tomography (DCT) experiment and the fast Fourier transform (FFT) numerical homogenisation scheme. The microstructure of a recrystallized sample of 304L austenitic steel has been characterized with the DCT technique at ESRF (ID11 beamline) which allows to have access to the spatial distribution and the individual shape of the constituent grains together with their crystalline orientation. To estimate the mechanical behaviour of such real polycrystalline microstructure, the most widely used approach is based on the finite element technique which implies a tedious and complex task of meshing. To circumvent this di culty, an attractive approach is the FFT-based numerical scheme which allows to use the digital image of the microstructure as a direct input to compute the mechanical response of a heterogeneous material. The e ciency of this method combined with experimental tomographic data is emphasized and the elastic and elastic-plastic behavior of the polycrystalline sample is investigated. Comparisons are made with estimates delivered by the self-consistent approach, that rely on partial information on the microstructure, and first order bounds.
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Dates et versions

hal-00788969 , version 1 (15-02-2013)

Identifiants

  • HAL Id : hal-00788969 , version 1

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Abderrahim Belkhabbaz, Renald Brenner, Nicolas Rupin, Bacroix Brigitte, Joao Fonseca. Prediction of the overall behavior of a 3D microstructure of austenitic steel by using FFT numerical scheme. Procedia Engineering, 2011, 10, pp.1883-1888. ⟨hal-00788969⟩
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