rian seghir

44
Documents
Affiliation actuelle
  • Institut de Recherche en Génie Civil et Mécanique (GeM)
Identifiants chercheurs
Contact

Présentation

PhD graduate (in 2012) with research background in numerical and experimental mechanics. My work deals with the development of full-field measurement techniques and thermomechanical characterization of metallic and polymeric materials. I focused, in the last years, to the identification of dynamic properties through full-field Ultra-High Speed Imaging and Inverse Methods. Since 2018, I am CNRS Reasearcher (CR) at the Research Institute in Civil and Mechanical Engineering (GeM) of Nantes.


Compétences

Research Engineering High strain-rate characterization crystal plasticity infrared thermography Digital Image Correlation Inverse methods

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Publications

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Thermomechanical couplings of twinning Magnesium over a reversed load path

Necdet Ali Özdür , Sefer Can Erman , Laurent Stainier , Rian Seghir , C. Can Aydıner

Materials Today Communications, 2025, 46, pp.112563. ⟨10.1016/j.mtcomm.2025.112563⟩

Article dans une revue hal-05391575v1
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Experimental characterization of material strain-rate dependence based on full-field Data-Driven Identification

Adrien Vinel , Rian Seghir , Julien Berthe , Gerald Portemont , Julien Réthoré

International Journal of Impact Engineering, 2024, 194, pp.105083. ⟨10.1016/j.ijimpeng.2024.105083⟩

Article dans une revue hal-04048778v5
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Determining singular and non-singular Williams' expansion terms from full-field measurements: consideration of structural effects on fracture behaviour

Bastien Lammens , Gérald Portemont , Julien Berthe , Rian Seghir , Julien Réthoré

Theoretical and Applied Fracture Mechanics, 2024, 130 (104304), ⟨10.1016/j.tafmec.2024.104304⟩

Article dans une revue hal-04446229v2
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Crack branching at low tip speeds: spilling the T

Elie Eid , Rian Seghir , Julien Réthoré

Journal of Theoretical, Computational and Applied Mechanics, 2023, pp.1-30. ⟨10.46298/jtcam.10172⟩

Article dans une revue hal-03817644v3
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Investigation of fracture source mechanisms through full-field imaging and acoustic emission

Raphael Heinzmann , Rian Seghir , Syed Yasir Alam , Julien Réthoré

Engineering Fracture Mechanics, 2023, 295, pp.109744. ⟨10.1016/j.engfracmech.2023.109744⟩

Article dans une revue hal-04149446v2
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Experimental investigation of the alternate recurrence of quasi-static and dynamic crack propagation in PMMA

Raphael Heinzmann , Rian Seghir , Syed Yasir Alam , Julien Réthoré

International Journal of Fracture, 2023, 242 (2), pp.227-245. ⟨10.1007/s10704-023-00717-8⟩

Article dans une revue hal-03975862v2
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Multiscale analysis of brittle failure in heterogeneous materials

Elie Eid , Rian Seghir , Julien Réthoré

Journal of the Mechanics and Physics of Solids, 2021, ⟨10.1016/j.jmps.2020.104204⟩

Article dans une revue hal-02978612v1
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Metrological assessment of multi‐sensor camera technology for spatially‐resolved ultra‐high‐speed imaging of transient high strain‐rate deformation processes

Adrien Vinel , Rian Seghir , Julien Berthe , Gérald Portemont , Julien Réthoré

Strain, 2021, 57 (4), pp.e12381. ⟨10.1111/str.12381⟩

Article dans une revue hal-03236454v1
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An open-source Abaqus implementation of the phase-field method to study the effect of plasticity on the instantaneous fracture toughness in dynamic crack propagation

Gergely Molnar , Anthony Gravouil , Rian Seghir , Julien Réthoré

Computer Methods in Applied Mechanics and Engineering, 2020, ⟨10.1016/j.cma.2020.113004⟩

Article dans une revue hal-02541808v1
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Non-parametric material state field extraction from full field measurements

Adrien Leygue , Rian Seghir , Julien Réthoré , Michel Coret , Erwan Verron et al.

Computational Mechanics, 2019, ⟨10.1007/s00466-019-01725-z⟩

Article dans une revue hal-02158197v1

A Novel Image-based Ultrasonic Test to Map Material Mechanical Properties at High Strain-rates

R. Seghir , F. Pierron

Experimental Mechanics, 2017, 58 (2), pp.183-206. ⟨10.1007/s11340-017-0329-4⟩

Article dans une revue hal-04494937v1

Influence of the Casting Process in High Temperature Fatigue of A319 Aluminium Alloy Investigated By In-Situ X- Ray Tomography and Digital Volume Correlation

Nora Dahdah , Nathalie Limodin , Ahmed El Bartali , Jean-François Witz , Rian Seghir et al.

Procedia Structural Integrity, 2016, 2, pp.3057-3064. ⟨10.1016/j.prostr.2016.06.382⟩

Article dans une revue hal-01612309v1
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Influence of pores on crack initiation in monotonic tensile and cyclic loadings in lost foam casting A319 alloy by using 3D in-situ analysis

Long Wang , Nathalie Limodin , Ahmed El Bartali , Jean-Francois Witz , Rian Seghir et al.

Materials Science and Engineering, 2016, 673, pp.362-372. ⟨10.1016/j.msea.2016.07.036⟩

Article dans une revue hal-01433827v1
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Damage Investigation in A319 Aluminium Alloy by X-ray Tomography and Digital Volume Correlation during In Situ High-Temperature Fatigue Tests

Nora Dahdah , Nathalie Limodin , Ahmed El Bartali , Jean-Francois Witz , Rian Seghir et al.

Strain, 2016, 52 (4), pp.324-335. ⟨10.1111/str.12193⟩

Article dans une revue hal-01419328v1
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A Dedicated DIC Methodology for Characterizing Plastic Deformation in Single Crystals

Xiaogang Wang , Jean-François Witz , Ahmed El Bartali , Abdelali Oudriss , Rian Seghir et al.

Experimental Mechanics, 2016, 56 (7), pp.1155-1167. ⟨10.1007/s11340-016-0159-9⟩

Article dans une revue hal-01358974v1
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Controlled mud-crack patterning and self-organized cracking of polydimethylsiloxane elastomer surfaces

Rian Seghir , S. Arscott

Scientific Reports, 2015, 5 (1), ⟨10.1038/srep14787⟩

Article dans une revue hal-02345522v1

Photo-hardenable and patternable PDMS/SU-8 hybrid functional material: A smart substrate for flexible systems

Rian Seghir , S. Arscott

Journal of Polymer Science Part B: Polymer Physics, 2015, 53 (18), pp.1281-1291. ⟨10.1002/polb.23773⟩

Article dans une revue istex hal-02345569v1
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Mechanically robust, electrically stable metal arrays on plasma-oxidized polydimethylsiloxane for stretchable technologies

Rian Seghir , S. Arscott

Journal of Applied Physics, 2015, 118 (4), pp.045309. ⟨10.1063/1.4927616⟩

Article dans une revue hal-02345538v1
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Microplasticity in Polycrystals: A Thermomechanical Experimental Perspective

Eric Charkaluk , Rian Seghir , Laurence Bodelot , Jean-Francois Witz , Philippe Dufrenoy

Experimental Mechanics, 2015, 55 (4), pp.741-752. ⟨10.1007/s11340-014-9921-z⟩

Article dans une revue hal-01235785v1
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An improved Lagrangian thermography procedure for the quantification of the temperature fields within polycrystals

Rian Seghir , Jean-Francois Witz , Laurence Bodelot , Eric Charkaluk , Philippe Dufrenoy

Quantitative InfraRed Thermography Journal, 2013, 10 (1), pp.74-95. ⟨10.1080/17686733.2013.785207⟩

Article dans une revue hal-00871131v1

Improvement of thermomechanical full-field analysis of metallic polycrystals using crystallographic data

Rian Seghir , Jean-Francois Witz , Eric Charkaluk , Philippe Dufrenoy

Mechanics & Industry, 2013, 13 (6), pp.395-403. ⟨10.1051/meca/2012035⟩

Article dans une revue hal-00863628v1
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Numerical and experimental estimation of thermomechanical fields heterogeneity at the grain scale of 316L stainless steel

Rian Seghir , Laurence Bodelot , Eric Charkaluk , Philippe Dufrenoy

Computational Materials Science, 2012, 53 (1), pp.464-473. ⟨10.1016/j.commatsci.2011.08.036⟩

Article dans une revue hal-00636682v1
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Identification inverse de champs de température en pointe de fissure

Camille Crusson , Julien Berthe , Bastien Lammens , Gerald Portemont , Rian Seghir et al.

26e Congrès Français de Mécanique, Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3 - UMR CNRS 7239), Aug 2025, Metz, France

Communication dans un congrès hal-05313019v1
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Nouvelle stratégie de stéréo-corrélation d'images numériques pour l'étude de la fragmentation dynamique.

Fabien Daheron , Julien Réthoré , Rian Seghir , Aurihona Wolff , Gilles Besnard

26e Congrès Français de Mécanique, Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3 - UMR CNRS 7239), Aug 2025, Metz, France

Communication dans un congrès hal-05313092v1
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Characterization of the dynamic toughness of composite materials by a microscopic approach

Bastien Lammens , Gérald Portemont , Julien Berthe , Rian Seghir , Julien Réthoré

ICCM23, Jul 2023, Belfast, Ireland

Communication dans un congrès hal-04219514v1
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Experimental characterization of the dynamic toughness of epoxy resin

Bastien Lammens , Gerald Portemont , Julien Berthe , Rian Seghir , Julien Réthoré

ICEM 2023, Jul 2023, Porto, Portugal

Communication dans un congrès hal-04305292v1
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Characterisation of the dynamic toughness of composite materials

Bastien Lammens , Gerald Portemont , Julien Berthe , Rian Seghir , Julien Réthoré

CFM 2022, Aug 2022, Nantes, France

Communication dans un congrès hal-03932297v1
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Image-based Stress Field Reconstruction in Complex Media

Rian Seghir , F Pierron , L Fletcher

Residual Stress, Thermomechanics and Infrared Imaging, Hybrid Techniques and Inverse Problems - Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics, Oct 2019, Greenville, United States

Communication dans un congrès hal-03154118v1

Low Cycle Fatigue of a Lost Foam Cast Al-Si-Cu alloy: study of the damage mechanisms with X-ray tomography and Digital Volume Correlation

Nathalie Limodin , Long Wang , Nora Dahdah , Ahmed El Bartali , Jean-Francois Witz et al.

Fatigue 2018, May 2018, Poitiers, France

Communication dans un congrès hal-01807449v1
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Viscoelastic properties identification through innovative Image-Based DMTA strategy

Rian Seghir , Fabrice Pierron

CFM 2017 - 23ème Congrès Français de Mécanique, Aug 2017, Lille, France

Communication dans un congrès hal-03465321v1
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Isothermal low cycle fatigue of a lost foam cast Al-Si-Cu alloy: study of the damage mechanisms with synchrotron X-ray tomography and Digital Volume Correlation

Nathalie Limodin , Long Wang , Nora Dahdah , Ahmed El Bartali , Jean-Francois Witz et al.

LCF8 Eighth International Conference on Low Cycle Fatigue, Jun 2017, Dresden, Germany. pp.41

Communication dans un congrès hal-01617612v1

Analysis of fatigue cracks initiation and growth in an Al-Si-Cu alloy using in-situ fatigue tests under synchrotron x-ray tomography coupled with digital volume correlation

Nathalie Limodin , Long Wang , Nora Dahdah , Ahmed El Bartali , Jean-Francois Witz et al.

International Conf. on Fatigue Damage of Structural Materials XI, Sep 2016, Hyannis, United States

Communication dans un congrès hal-01736334v1
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Study of damage mechanisms in A319 aluminium alloy by X-ray tomography and Digital Volume Correlation

Nora Dahdah , Nathalie Limodin , Ahmed El Bartali , Jean-Francois Witz , Rian Seghir et al.

Photomechanics, May 2015, Delft, Netherlands

Communication dans un congrès hal-01729131v1

Influence of the casting microstructure on LCF damage mechanisms in an Al-Si alloy using X-ray tomography

Ahmed El Bartali , Long Wang , Nora Dahdah , Nathalie Limodin , Jean-Francois Witz et al.

26th Colloquium on Fatigue mechanisms, Mar 2015, Brno, Czech Republic

Communication dans un congrès hal-01736324v1
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In situ fatigue tests under X-ray tomography: damage mechanisms in a cast Aluminium Silicon alloy

Nathalie Limodin , Long Wang , Nora Dahdah , Ahmed El Bartali , Jean-Francois Witz et al.

9th European Solid Mechanics Conference (ESMC 2015), Jul 2015, Leganes-Madrid, Spain. pp.676

Communication dans un congrès hal-01736327v1
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Influence of the Casting Microstructure upon the Tensile Behaviour in A319 Al‐Si Alloy Investigated by X‐Ray Tomography and Digital Volume Correlation

Long Wang , Nathalie Limodin , Ahmed El Bartali , Julien Réthoré , Jean‐françois Witz et al.

Second International Congress on 3D Materials Science, 2014, Annecy, France. pp.73-78, ⟨10.1007/978-3-319-48123-4_12⟩

Communication dans un congrès hal-01668787v1

Cyclic plasticity in duplex stainless steel

Rian Seghir , Ahmed El Bartali , Jean-Francois Witz , Philippe Dufrenoy , Eric Charkaluk

In Fatigue 2014, Mar 2014, Melbourne, Australia

Communication dans un congrès hal-01768660v1
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Influence of the Lost Foam Casting Microstructure on Low Cycle Fatigue Damage of A319 Aluminum Alloy

Nora Dahdah , Nathalie Limodin , Ahmed El Bartali , Jean-Francois Witz , Rian Seghir et al.

The 2nd International Congress on 3D Materials Science, Jun 2014, Annecy, France. pp.97-102, ⟨10.1007/978-3-319-48123-4_16⟩

Communication dans un congrès hal-01668786v1

Investigation of the work hardening stages of nickel single crystals from full-field strain measurements

X.G Wang , Abdelali Oudriss , Ahmed El Bartali , Jean-Francois Witz , Rian Seghir et al.

Plasticité 2014, Apr 2014, Lyon, France

Communication dans un congrès hal-01770051v1

Thermomechanical determination of the CRSS in a polycristal

Rian Seghir , X.G Wang , Ahmed El Bartali , Eric Charkaluk , Jean-Francois Witz et al.

Photomechanics2013, May 2013, montpellier, France

Communication dans un congrès hal-01771079v1
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Apport de la texture dans l'analyse des champs thermomécaniques polycristallins

Rian Seghir , Jean-Fançois Witz , Eric Charkaluk , Philippe Dufrenoy

10e colloque national en calcul des structures, May 2011, Giens, France. pp.Clé USB

Communication dans un congrès hal-00592819v1
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Eléments expérimentaux et numériques sur le couplage thermoplastique à l'échelle des grains d'un matériau métallique

Rian Seghir , Eric Charkaluk , Philippe Dufrenoy

CFM 2009 - 19ème Congrès Français de Mécanique, Aug 2009, Marseille, France

Communication dans un congrès hal-03391486v1