Numerical modeling of ductile fracture at the microscale combined with x-ray laminography and digital volume correlation.

Pierre-Olivier Bouchard 1, * Victor-Manuel Trejo-Navas 1 Modesar Shakoor 1 Marc Bernacki 1 Thilo Morgeneyer 2 Ante Buljac 3, 2 François Hild 3
* Auteur correspondant
1 CEMEF - Centre de Mise en Forme des Matériaux
2 MAT - Centre des Matériaux
3 LMT - Laboratoire de Mécanique et Technologie
Abstract : Predicting ductile fracture for complex loading paths is essential within the framework of metal forming processes. Most models are developed and used at the macroscopic scale and do not account explicitly for material microstructures. This paper describes a methodology aiming at understanding and modeling ductile damage mechanisms at the microscale. This methodology relies on the acquisition of X-Ray laminography pictures during in-situ tensile tests, digital volume correlation (DVC) to measure 3D displacement and strain fields in the bulk and 3D finite element (FE) modeling of the heterogeneous microstructure including ductile damage mechanisms. The methodology is illustrated on nodular graphite cast iron. FE simulations of the heterogeneous microstructure are conducted and compared with DVC results and the influence of boundary conditions is discussed.
Keywords : Finite element Modeling Ductile fracture Microstructure
Type de document :
Communication dans un congrès
20th International ESAFORM Conference on Material Forming (ESAFORM 2017), Apr 2017, Dublin, Ireland. AIP Conference Proceedings, 1896, pp.Article number 160016, 〈10.1063/1.5008191〉
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Pierre-Olivier Bouchard, Victor-Manuel Trejo-Navas, Modesar Shakoor, Marc Bernacki, Thilo Morgeneyer, et al.. Numerical modeling of ductile fracture at the microscale combined with x-ray laminography and digital volume correlation.. 20th International ESAFORM Conference on Material Forming (ESAFORM 2017), Apr 2017, Dublin, Ireland. AIP Conference Proceedings, 1896, pp.Article number 160016, 〈10.1063/1.5008191〉. 〈hal-01558442〉

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