Julien Morthomas

+33(0)4 72 43 61 30

Position : Maître de Conférences

Address : 7 avenue Jean Capelle, Bâtiment Blaise Pascal, 5° étage 69621 Villeurbanne

Assistant Professor

Researches, Publications, Thesis/postdoctoral supervision, Communications, Teachings

RESEARCH

Study by molecular dynamics simulations of the mechanical and thermal behaviors at the micro and macroscopic scale of the different classes of materials: metals, polymers and ceramics.

PUBLICATIONS

HAL link / Google Scholar link

2023
25. Enhanced nucleation of bimodal molecular weight distribution polymers: A molecular dynamics study
Zengqiang Zhai, Julien Morthomas, Claudio Fusco, Michel Perez, and Olivier Lame
European Physics Letters, 2023, 144, 26002

24. Linear, Star, Comb and Ring Crystallizable Multiblock Copolymers Investigated by Molecular Dynamics Simulations
Morthomas Julien, Viola Veronica, Vallejo-Otero Victor and Baeza Guilhem
Macromolecules, 2023, 56, 13, 4800–4813
2022
23. Mechanistic Understanding of Stickers Aggregation in Supramolecular Polymers: Quantitative Insights from the Plateau Modulus of Triblock Copolymers
      Nébouy Matthias, Morthomas Julien, Fusco Claudio, Chazeau Laurent, Jabbari Farouji Sara, Baeza Guilhem
      Macromolecules, 2022, 21, 9558–9570

22. Cs diffusion mechanisms in UO2 investigated by SIMS, TEM and atomistic simulations
      Clémentine Panetier, Yves PIPON, Clotilde Gaillard, Denis Mangin, Jonathan Amodeo, Julien Morthomas, Thierry Wiss, Alessandro Benedetti, Roland Ducher, Roland
      Dubourg and Nathalie Moncoffre
      Journal of Chemical Physics, 2022, 156, 044705
2021
21. Microstructural effects on the dynamical relaxation of glasses and glass composites: a molecular dynamics study
      Guojiang Lyua, J-C Qiaoa, Yao Yao, Yun-Jiang Wanga, Julien Morthomas, Claudio Fusco and David Rodney
      Acta Materialia, Elsevier, 2021, 220, pp.117293

20. Flow-Induced Crystallization of a Multi-Block Copolymer under Large Amplitude Oscillatory Shear: Experiments and Modeling
      Matthias Nébouy, Laurent Chazeau, Julien Morthomas, Claudio Fusco, Philippe Dieudonné-George, and Guilhem Baeza.
      Journal of Rheology, 2021, 65, 405
2020
19. Coarse-Grained Molecular Dynamics Modeling of Segmented Block Copolymers: Impact of the Chain Architecture on Crystallization and Morphology
      Matthias Nébouy, Julien Morthomas, Claudio Fusco, Guilhem Pablo Baeza, and Laurent Chazeau
      Macromolecules, 2020, 53, 10, pp. 3847–3860.

18. Dynamic correspondence principle in the viscoelasticity of metallic glasses
      Guojiang Lyua, J-C Qiaoa, Yao Yao, Jean-Marc Pelletier, David Rodney, Julien Morthomas and Claudio Fusco
      Scripta Materialia, 2020, 174, pp. 39-43
2019
17. Disentangling and lamellar thickening of linear polymers during crystallization: simulation of bimodal and unimodal molecular weight distribution systems
      Zengqiang Zhai, Julien Morthomas, Claudio Fusco, Michel Perez and Olivier Lame
      ACS Nano, 2019, 13, 10, pp. 11310-11319

16. Inventer l'avenir - L'ingénierie se met au verts - CNRS Edition
      Les « grains de vide » des aérogels, matière à construire (chap. 2, Construire le bâtiment durable)
      B. Yrieix, B. Chal, E. Maire, L. Roiban, A. Malchere, J. Randrianalisoa, C. L. Martin, P. Chantrenne, J.Amodeo, W. Gonçalves, J. Morthomas and G. Foray
      CNRS Edition - Écologie, environnement, sciences de la Terre

15. Crystallization and molecular topology of linear semi-crystalline polymers: simulation of uni- and bimodal molecular weight distribution systems
      Zengqiang Zhai, Julien Morthomas, Claudio Fusco, Michel Perez and Olivier Lame
      Macromolecules, 2019, 52, 11, pp. 4196-4208

14. A novel method to predict the thermal conductivity of nanoporous materials from atomistic simulations
      Julien Morthomas, William Gonçalves, Michel Perez, Geneviève Foray, Christophe L. Martin and Patrice Chantrenne
    Journal of Non-Crystalline Solids, Elsevier, 2019, 516, pp 89-98

13. Ordering of carbon in highly supersaturated alpha-Fe
      Osamu Waseda, Julien Morthomas, Fabienne Ribeiro, Patrice Chantrenne, Chad Sinclair and Michel Perez
      Modelling and Simulation in Materials Science and Engineering, 2019, 27 (3), 015005
2018
12. Nanocompression of secondary particles of silica aerogel
      William Gonçalves, Jonathan Amodeo, Julien Morthomas, Patrice Chantrenne, Michel Perez, Geneviève Foray and Christophe L. Martin
      Scripta Materialia, 2018, 157, pp. 157-161

11. Polymer chain generation for coarse-grained models using radical-like polymerization
      Morgane Mahaud, Zengqiang Zhai, Michel Perez, Olivier Lame, Claudio Fusco, Laurent Chazeau, Ali Makke, Grégory Marque and Julien Morthomas
      Communications in Computational Physics, 2018, 24 (3), pp. 885-898

     10. Elasticity and strength of silica aerogels: A molecular dynamics study on large volumes
         William Gonçalves, Julien Morthomas, Patrice Chantrenne, Michel Perez, Geneviève Foray and Christophe L. Martin
           Acta Materialia, Elsevier, 2018, 145, pp.165 - 174.

2017
9. Crystallization of finite-extensible nonlinear elastic Lennard-Jones coarse-grained polymers
     Julien Morthomas, Claudio Fusco, Zengqiang Zhai, Olivier Lame and Michel Perez
     Physical Review E , American Physical Society (APS), 2017, 96 (5).

8. Stability of nanocrystalline Ni-based alloys: coupling Monte Carlo and molecular dynamics simulations
     O. Waseda, J. Morthomas, G. Goldenstein, G. Silva, A. Neiva, C. Chantrenne, M Perez, C. Becquart and R. Veiga
     Modelling and Simulation in Materials Science and Engineering, IOP Publishing, 2017, 25 (7).

7. Formation of carbon Cottrell atmospheres and their effect on the stress field around an edge dislocation
     Osamu Waseda, Roberto Ga Veiga, Julien Morthomas, Patrice Chantrenne, Charlotte S Becquart, Fabienne Ribeiro, Andrei Jelea, Helio Goldenstein and Michel Perez
     Scripta Materialia, Elsevier, 2017, 129, pp.16--19.
2016
6. Molecular dynamics simulations of amorphous silica surface properties with truncated Coulomb interactions
William Gonçalves, Julien Morthomas, Patrice Chantrenne, Michel Perez, Geneviève Foray and Christophe L. Martin
Journal of Non-Crystalline Solids, Elsevier, 2016, 447, pp.1 - 8.
2015
5. In situ investigation of MgO nanocube deformation at room temperature
Inas Issa, Jonathan Amodeo, Julien Réthoré, Lucile Joly-Pottuz, Claude Esnouf, Julien Morthomas, Michel Perez, Jérome Chevalier and Karine Masenelli-Varlot
Acta Materialia, Elsevier, 2015, 86, pp.295-304.
2014
4. A novel method for calculating the energy barriers for carbon diffusion in ferrite under heterogeneous stress
Deyana S Tchitchekova, Julien Morthomas, Fabienne Ribeiro, Roland Ducher and Michel Perez
Journal of Chemical Physics, American Institute of Physics, 2014, 141 (3), pp.034118.
2010

     3. Hydrodynamic attraction of immobile particles due to interfacial forces
          Julien Morthomas and Alois Würger
          Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2010, 81, pp.051405.

2009
2. Thermophoresis at a charged surface: the role of hydrodynamic slip
Julien Morthomas and Alois Würger
Journal of Physics: Condensed Matter, IOP Publishing, 2009, 21 (3), pp.035103.
2008
1. Thermoelectric effect of charged colloids in the Hückel limit
Julien Morthomas and Alois Würger
European Physical Journal E: Soft matter and biological physics, EDP Sciences: EPJ, 2008, 27, pp.425.
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THESIS/POSDOCTORAL SUPERVISION (or participation)

- Salse Matthieu (09/2022 - ...) - Thesis - ... (Collaboration)
- Wang Junxiong (09/2020 - ...) - Thesis - Molecular dynamics simulation of semicrystalline polymers: from molecular topology to mechanical properties (Co-director)
- Liang Meng (10/2018 - 12/2022) - Thesis - Modeling the mechanical behaviour of bulk metallic glasses under deformation at local scale: molecular origin of structural relaxations and the role of the composition on plasticity (Co-supervisor)
- Guojiang Lyu (10/2016 - 06/2020) - Thesis - Mechanical behaviour of bulk metallic glasses with heterogeneities: a molecular dynamics study (Collaboration, 2 papers)
- Wassim Kassem (10/2018 - 10/2019) - Postdoctoral research - Water surface effects on the mechanical properties of silica aerogels: a molecular dynamics study (Supervisor)
- Matthias Nebouy - (10/2017 - 12/2020) - Thesis - Experience/simulation dual approach of the dynamic properties of thermoplastic elastomers (Collaboration, 1 paper)
- Clémentine Panetier (09/2016 - 11/2019 ) - Thesis - Study of the behavior of Cs and Ba fission products and their interactions with Mo in stoichiometric and superstoichiometric UO2 - (Collaboration)
- Zengqiang Zhaï (10/2015 - 09/2019) - Thesis - Nanostructured semi-crystalline polymers : from molecular dynamics (Co-supervisor, 4 papers)
- Morgane Mahaud (09/2013 - 06/2017) - Thesis - Molecular dynamics study of the mechanical behavior and rupture of irradiated elastomers (Co-director, 1 paper)
- Osamu Waseda (09/2013 - 12/2016) - Thesis - Atomic scale investigation of aging in metals (Co-director, 3 papers)
- William Gonçalves (09/2013 - 11/2016) - Thesis - Study of the mechanical properties of silica aerogels: modeling in molecular dynamics (Co-encadrant, 3 papers)
- Inas Issa (09/2012 - 01/2016) - Thesis - In situ TEM nanocompression and mechanical analysis of ceramic nanoparticles (Collaboration, 1 paper)
- Jonathan Amodeo (09/2013 - 09/2015) - Postdoctoral research - In situ investigation of MgO nanocube deformation at room temperature (Supervisor, 1 paper)
- Deyana Tchitchekova (01/2012 - 09/2013) - Postdoctoral research - A novel method for calculating the energy barriers for carbon diffusion in ferrite under heterogeneous stress (Co-supervisor, 1 paper)

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TEACHINGS

- Materials Departement - second undergraduate cycle of INSA Lyon
      + Lecture on Numeric Techniques for Ingineer - Python (50h of tutorial) - 3rd year
      + Material pratical (48h) - 3rd year
      + Numeriacl Material (40h tutorial, 48h projects ) - 4th year
   + Data processing and Artificial Intelligence (4h of lectures, 4h of tutorial and 8h of project) - 5th year
      + In charge of end of study projects 5th year

- Initial Engineering Training Departement (FIMI)
      + Supervisor of P2I-7 : Numerical Modeling for the Engineer- 2nd year (P2I = Multidisciplinary Initiation to Engineering Course)
           - lecture on Particles dynamics (20h tutorial)
           - small-Projects (12h) eand Projects (70h) - Supervisor- 2nd year
   + Software Systems and Tools (13h of tutorial) - 1st year
      + Mathematical and numerical tools for engineers (28h tutorial) - 1st year