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