Coupling Diffraction Contrast Tomography with the Finite Element Method1 . Issue 6 (16th November 2015)

• Record Type: Journal Article
• Authors: Proudhon, Henry; Li, Jia; Reischig, Peter; Guéninchault, Nicolas; Forest, Samuel; Ludwig, Wolfgang
• Is Part Of: Advanced engineering materials. Volume 18:Issue 6(2016:Jun.)
• Page Start: 903
• Page End: 912
• Publication Date: 2015-11-16
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.201500414
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : This paper explains how to turn full three dimensional (3D) experimental grain maps into a finite elements (FE) mesh suitable for mechanical analysis. Two examples from diffraction contrast tomography characterizations are presented. Deformation of a pure titanium sample with 1400 grains is computed using elastic anisotropy and accurate boundary conditions allows to correctly capture the grain to grain elastic strain variations. In the second example a significantly large zone of a polycrystalline Al–Li sample is meshed and computed using elastoplastic finite strain calculation. Mean lattice reorientations and intra‐grain lattice orientation spread are obtained as a function of deformation. Abstract : This paper explains how to turn 3D experimental grain maps into suitable mesh for mechanical analysis . Two examples from diffraction contrast tomography experiments are featured. i) A pure titanium sample of 600 microns diameter composed of 1 400 grains; ii) a significantly large zone of a polycrystalline Al–Li sample is meshed and deformed using crystal plasticity with a finite strain formulation.