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Featured researches published by Emile Roux.


Modelling and Simulation in Materials Science and Engineering | 2014

A new finite element approach for modelling ductile damage void nucleation and growth—analysis of loading path effect on damage mechanisms

Emile Roux; Modesar Shakoor; Marc Bernacki; Pierre-Olivier Bouchard

A two-dimensional finite element (FE) model is presented to model the nucleation and void growth stages in ductile damage phenomena on the microstructure scale. This model is based on a level-set (LS) method coupled with an advanced re-meshing strategy. Both nucleation modes (interface debonding and inclusion fracture) are modelled through the introduction of micro-voids according to stress-based criteria. The LS method and mesh adaptation are used to accommodate the topology modification of the microstructure and to model multiple void nucleation and growth for different loading paths. The enhanced FE model is adopted to analyse the key features of the damage mechanisms on the micro-scale. The effects of inclusion orientation and of a complex loading path on nucleation and void growth are addressed. Good agreement is found with available experimental and numerical data found in the literature. The results exhibit that the loading path is a key point in damage growth. The proposed FE framework is an efficient technique to study damage phenomena on both simple and realistic microstructures. In the future, such an approach can be used to calibrate macroscopic ductile damage models for a complex loading path.


The 14th International Esaform Conference on Material Forming: ESAFORM 2011 | 2011

Ductile damage parameters identification for cold metal forming applications

Pierre-Olivier Bouchard; Jean-Marie Gachet; Emile Roux

Ductile damage mechanics is essential to predict failure during cold metal forming applications. Several damage models can be found in the literature. These damage models are coupled with the mechanical behavior so as to model the progressive softening of the material due to damage growth. However, the identification of damage parameters remains an issue. In this paper, an inverse analysis approach is set‐up to identify ductile damage parameters, based on different kind of mechanical tests and observables. The Lemaitre damage model is used and damage is coupled with the material behavior. The Efficient Global Optimization (EGO) method is used in a parallel environment. This global algorithm based on kriging meta‐model enables the identification of a set of damage parameters based on experimental observables. Global and local observables are used to identify these parameters and a special attention is paid to the computation of the cost function. Finally, an identification procedure based on displacement f...


Journal of Materials Processing Technology | 2013

Kriging metamodel global optimization of clinching joining processes accounting for ductile damage

Emile Roux; Pierre-Olivier Bouchard


Computational Materials Science | 2013

A level-set and anisotropic adaptive remeshing strategy for the modeling of void growth under large plastic strain

Emile Roux; Marc Bernacki; Pierre-Olivier Bouchard


Computational Materials Science | 2013

Three-dimensional analysis of real void closure at the meso-scale during hot metal forming processes

Michel Saby; Marc Bernacki; Emile Roux; Pierre-Olivier Bouchard


The 7th International Conference on Inverse Problems in Engineering (ICIPE) | 2011

Numerical investigation of ductile damage parameters identification: benefit of local measurements

Emile Roux; Pierre-Olivier Bouchard


XI International Conference on Computational Plasticity. Fundamentals and Applications - COMPLAS XI | 2011

Optimization of Metal Forming Processes for Improving Final Mechanical Strength

Jean-Loup Chenot; Pierre-Olivier Bouchard; Lionel Fourment; Patrice Lasne; Emile Roux


conference on computational structures technology | 2010

Ductile Damage Material Parameter Identification: Numerical Investigation

Emile Roux; Pierre-Olivier Bouchard


The Third International Conference on Computational Modeling of Fracture and Failure of Materials and Structures | 2013

Finite Element Modeling of Void Nucleation, Growth and Coalescence for Large Plastic Strain and Complex Loading Paths

Pierre-Olivier Bouchard; Emile Roux; Marc Bernacki


CSMA 2013 - 11ème colloque national en calcul des structures | 2013

Modélisation des micro mécanismes d'endommagement ductile par une approche couplant fonctions level-set et adaptation anisotrope de maillage

Emile Roux; Marc Bernacki; Pierre-Olivier Bouchard

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Marc Bernacki

École Normale Supérieure

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Lionel Fourment

École Normale Supérieure

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