Keywords
Team
SIMS - Simulation des Matériaux et des Structures
Biography
Kais Ammar is a researcher specializing in the mechanical and microstructural modeling of materials, with particular expertise in crystalline plasticity, the behavior of metal coatings, and multiphysical coupling. His work focuses on the development of advanced constitutive models to describe large-scale deformations, incorporating thermodynamically consistent approaches such as the multiplicative decomposition of the strain gradient or the use of isocline intermediate configurations. He also explores deformation and damage mechanisms in metallic coatings, particularly zinc-aluminum-magnesium alloys, by combining in situ experimental techniques (SEM, EBSD, digital image correlation) with finite element numerical simulations. His research addresses industrial challenges, such as corrosion, material fatigue, and the optimization of rapid solidification processes, while contributing to the improvement of commercial simulation tools through the integration of innovative models (intermittent plasticity, size effects, and chemomechanical coupling).
Publication(s)
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2026
A generic formulation of anisotropic thermo-elastoviscoplasticity at finite deformations for finite element codes DOI : 10.1007/s00466-024-02543-8
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2025
In-Situ Characterization of the Mechancial Behavior of Hot-Dip Zn-5al Coating: An Overview of Deformation and Damage Mechanisms DOI : 10.14773/CST.2025.24.2.86
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2025
Effect of oxygen content on elastic properties of an oxygen-graded titanium: Experimental and computational analyses DOI : 10.1016/j.matdes.2025.114801
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2025
A time-discontinuous elasto-plasticity formalism to simulate instantaneous plastic flow bursts DOI : 10.1016/j.ijsolstr.2024.113171
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2025
Viscoplasticity and phase field modelling of the delayed cracking of oxide intrusions at grain boundaries DOI : 10.1016/j.jmps.2025.106300
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2024
Experimental and digital twinning in ZnAlMg coatings DOI : 10.1016/j.mechmat.2024.105173
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2024
Effect of Free Surface, Oxide, and Coating Layers on Rafting in γ-γ′ Superalloys DOI : 10.1007/978-3-031-63937-1_66
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2024
Cosserat-phase-field modeling of grain nucleation in plastically deformed single crystals DOI : 10.1016/j.jmps.2024.105628
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2024
In-situ localization of damage in a Zn-Al-Mg coating deposited on steel by continuous hot-dip galvanizing DOI : 10.1016/j.scriptamat.2023.115960
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2024
Phase-Field Modelling of Zinc Dendrite Growth in ZnAlMg Coatings DOI : 10.14773/cst.2024.23.2.93
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2024
Unravelling the extra-hardening in chemically architectured high entropy alloys DOI : 10.1016/j.commatsci.2023.112714
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2023
Toward robust scalar-based gradient plasticity modeling and simulation at finite deformations DOI : 10.1007/s00707-022-03411-3
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2022
Multiscale analysis of crystalline defect formation in rapid solidification of pure aluminium and aluminium-copper alloys DOI : 10.1098/rsta.2020.0319
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2022
Dislocation density in cellular rapid solidification using phase field modeling and crystal plasticity DOI : 10.1016/j.ijplas.2021.103139
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2021
Phase field model for the martensitic transformation: comparison of the Voigt/Taylor and Khachaturyan approach DOI : 10.1007/s00161-021-01007-1
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2021
Efficient simulation of single and poly-crystal plasticity based on the pencil glide mechanism DOI : 10.5802/CRMECA.44
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2021
Splitting of dissolving precipitates during plastic shear: A phase field study DOI : 10.5802/CRPHYS.82
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2020
Microstructure evolution in deformed polycrystals predicted by a diffuse interface Cosserat approach DOI : 10.1186/s40323-020-00146-5
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2019
A Cosserat–phase-field theory of crystal plasticity and grain boundary migration at finite deformation DOI : 10.1007/s00161-018-0727-6
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2019
Generalized continua and phase-field models: Application to crystal plasticity DOI : 10.1007/978-3-319-94186-8_6
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2018
Cosserat crystal plasticity with dislocation-driven grain boundary migration DOI : 10.1142/S242491301840009X
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2018
A new fatigue model including thermal ageing for low copper aluminum-silicon alloys DOI : 10.1016/j.proeng.2018.02.068
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2018
A Cosserat crystal plasticity and phase field theory for grain boundary migration DOI : 10.1016/j.jmps.2018.03.006
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2016
Multiaxial high-cycle fatigue criteria and life prediction: Application to gas turbine blade DOI : 10.1016/j.ijfatigue.2016.06.024
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2016
Homogenization of viscoplastic constitutive laws within a phase field approach DOI : 10.1016/j.jmps.2015.12.026
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2014
Modelling inheritance of plastic deformation during migration of phase boundaries using a phase field method DOI : 10.1007/s11012-014-0011-1
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2014
Micromorphic approach to crystal plasticity and phase transformation DOI : 10.1007/978-3-7091-1625-8_3
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2014
A fully coupled diffusional-mechanical formulation: numerical implementation, analytical validation, and effects of plasticity on equilibrium DOI : 10.1007/s00419-014-0860-z
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2012
A phase field model incorporating strain gradient viscoplasticity: Application to rafting in Ni-base superalloys DOI : 10.1016/j.jmps.2012.04.003
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2011
Micromorphic vs. phase-field approaches for gradient viscoplasticity and phase transformations DOI : 10.1007/978-3-642-22738-7_4
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2011
Phase field modeling of elasto-plastic deformation induced by diffusion controlled growth of a misfitting spherical precipitate DOI : 10.1080/09500839.2010.541891
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2009
Finite element formulation of the phase field model based on equilibrium theory of microforces; [Formulation éléments finis des modèles de champ de phases basée sur la théorie de l'équilibre des microforces] DOI : 10.1051/ptox/2009009
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2009
Finite element formulation of a phase field model based on the concept of generalized stresses DOI : 10.1016/j.commatsci.2008.09.015
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2009
Combining phase field approach and homogenization methods for modelling phase transformation in elastoplastic media DOI : 10.3166/ejcm.18.485-523
PhD supervision
- 2025 The mechanical behavior of a Zn-Al-Mg coating on hot-dip galvanized steel sheet NOUFE Ini Sabine
- 2024 Modeling of sheet metal forming of tantalum and prediction, using polycrystalline approaches, of the material generated on the part: mechanical behavior and microstructure THEALLER Alexandre
- 2023 Modeling of intergranular damage assisted by oxidation in nickel-based superalloys EL-HABYB Ayoub
- 2022 Oxidation of Zirconium Alloys: Mechanical-Diffusion Coupling with the Phase Field Method ELJEDAYNY Khadija
- 2022 Multi-scale study of the solidification, microstructure, and mechanical behavior of Zn-Al-Mg coatings on steel sheets BENGOETXEA ARISTONDO Mikel
- 2021 Advanced numerical simulation for understanding low points in the resilience of forged steels NGOUADJE KENKO Régis Emmanuel
- 2020 Modeling of recrystallization in polycrystals using a coupled phase-field and Cosserat medium model GHIGLIONE Flavien
- 2020 Experimental analysis and phase-field modeling of mechanical/diffusion coupling JBARA Wajih
- 2019 Automatic regularization method for finite element simulation of large deformation plasticity ABATOUR Mohamed
- 2019 A robust numerical approach for describing the brittle fracture and viscoplastic behavior of fuel rods SIEDEL David
- 2018 A multi-scale approach to the mechanical behavior of Zn-Al-Mg coatings on hot-dip galvanized steel sheets CHAIEB Houssem Eddine
- 2017 Study of the mechanical behavior and failure of ceramic particulate filters for Diesel engines. HASBULLAH Mohamad Hazmil