Ductile fracture – Influence of heterogeneous microstructure on nucleation, growth and coalescence mechanisms

Victor-Manuel Trejo-Navas (1) , Modesar Shakoor (1) , Marc Bernacki (1) , Pierre-Olivier Bouchard (1)

1 CEMEF - Centre de Mise en Forme des Matériaux

Investigations at the microstructure scale are essential if one wants to predict accurately ductile fracture of metallic materials under complex multiaxial and non-proportional loadings. An advanced finite element approach based on a level set formalism and body-fitted immersed meshing capabilities enable the modeling of nucleation, growth and coalescence mechanisms for complex 3D microstructures and under large plastic strain. Applications on real microstructures (coming from in-situ laminography) and exact boundary conditions (thanks to Digital Volume Correlation) are studied and discussed for different loading conditions.

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Victor-Manuel Trejo-Navas, Modesar Shakoor, Marc Bernacki, Pierre-Olivier Bouchard. Ductile fracture – Influence of heterogeneous microstructure on nucleation, growth and coalescence mechanisms. NUMIFORM 2016: The 12th International Conference on Numerical Methods in Industrial Forming Processes, The Minerals, Metals & Materials Society, Jul 2016, Troyes, France. ⟨hal-01421633⟩