MINES Saint-Étienne

Research Topics

Current Ph. D theses under my (co)-supervision – Model Order Reduction :

27. XXXXX, A contribution to the design of a ‘Blended Wing Body’ fuselage with carbon/thermoplastic composites for regional electric propulsion aviation, industrial / governmental funding (EENUEE), co-directors Ass Prof. P. Baral and R. Ferrier, 2024-2027

Topological multi-scale and multi-objective optimisation applied to a composite BWB fuselage.

26. M. Ghestin, Apports de l’apprentissage machine pour l’accélération des calculs multi-échelles et multi-temporels – application à l’élaboration de structures composites par infusion, Hexcel Chair funding, co-directors Prof. N. Moulin, Ass. Prof. R. Ferrier, and Prof. J. Bruchon, 2020-2023

POD-ROM built from stationary coarse models to produce reduced models of transient tow-phase flows.

Ph. D theses defended under my (co)-supervision :

Process modelling

25. A. Geoffre, Upscaling impregnation flows in random fibrous media – Application to infusion-based manufacturing process of composite materials, Hexcel Chair funding, co-directors Prof. J. Bruchon and Prof. N. Moulin, 2019-2022

What type of two-phase flow representation, depending on the medium size compared with the charactertistic size of the RVE : (right) homogeneous equivalent medium (Darcy) can be used with proper stochastic permeabilities (stationary and transient, potentially dependent on the Ca regime), capillary pressure and saturation (porisity map), or (left) DNS required but may be converted to Darcy’s-like (if necessary) response from pressure drop vs velocity response. (centre) too strong discontinuities in the micro-structure require DNS with no possible equivalence.

24. B. Durif, Mise en forme de renforts secs non-tissés nouvelle génération pour applications structures primaires aéronautiques, industrial / governmental funding (Hexcel Reinf.), co-director Ass Prof. N. Moulin, 2019-2022

HiTape(R) forming simulation with Abaqus(R): single ply representation with embedded membrane FE into CSS8 solid-based shell elements for membrane-bending decoupling + non-linear bending relationship + anisotropic constitutive laws. Cohesive surfaces for the interface representation in ply stackings. Finite transformation framework.

23. M. Gibaud, Fonctionnalisation et durabilité de composites hybrides bio-sourcés élaborés par procédés directs,governmental funding, co-advisor Ass Prof. P.-J. Liotier, 2016-2019

22. L. Bouquerel, Contribution à l’étude de la mise en forme de renforts secs non-tissés nouvelle génération pour applications structures primaires aéronautiques, industrial/governmental funding (Hexcel Reinf.), co-director Prof. P. Boisse (LAMCOS) and co-advisor Ass Prof. N. Moulin, 2016-2019 Awarded best PhD student for SAMPE France 2018.

Modelling approach with specific hyperelastic behaviours for the fibrous layer response and adapted cohesive zones handling friction and adhesion for the interface.

21. K. Andriamananjara, Approche numérique des couplages Stokes-Darcy dans les préformes faiblement perméables subissant de grandes transformations – modélisation des procédés par infusion de résine de structures aéronautiques primaires, Hexcel Chair funding, co-director Prof. J. Bruchon and Ass Prof. N. Moulin, 2015-2018

Presure enrichment for capillary integration at the flow front and T-stiffener infusion simulation accounting for orthtropic capillarity in orthotropic fibrous preforms (magenta front) compared to without capillarity (green front).

20. L. Chevalier, Approche numérique des écoulements Stokes-Darcy et de la capillarité pour modéliser les  procédés par infusion de résine de structures primaires aéronautiques, Hexcel Chair funding, co-director Prof. J. Bruchon and Ass Prof. P.J. Liotier, 2015-2018

Capillary wicking in a cluster of tubes, and capillary pressure assessment from transient (capillary) flow in a 2D micro-structure.

19. M. Pucci Élaboration de composites bio-sourcés par procédés d’élaboration directe. Effet des interfaces lors de l’imprégnation. co-advisor Ass Prof. P.J. Liotier, 2013-2016

Washburn experiment with water on natural and retified – thermal treatment – flax tows. Side view of the external wetting meniscus

18. M. Blais, 13th March 2016, Modélisation et suivi du procédé par infusion de résine sur une nouvelle génération de renforts pour applications structures primaires aéronautiques, industrial/governmental funding (Hexcel Reinf.), co-advisor Ass Prof. P.J. Liotier and Ass Prof. N. Moulin, 2012-2015

Resin pressure in fluid (distribution medium) and porous (preforms) regions during the infusion of a slice of auto-stiffened panel – comparison of isotropic vs orthropic case. Zebulon FE code.

16. H. Tossoukpé, 6th December 2013, High performance computing for grain-scale simulation of the sintering in doped and multi-materials, ANR funding, co-advisors Ass Prof. J. Bruchon and Prof. F. Valdivieso, 2010-2013

Sintering of non-doped and modo-doped grain stackings

Pressure disctribution during sintering of a reactive particle stack containg inert particles (I). HPC computing with CIMLIB FE code.

15. L. Abouorm, 27th September 2013 , VMS (Variational MultiScale) stabilization for Stokes-Darcy coupled flows in porous media undergoing finite deformations: application to infusion-based composite processing, co-advisors Ass. Prof. J. Bruchon and Dr Ing. N. Moulin.

Shell with a thin distribution medium, and RIGHT – flow front in fluid and porours region – final permeability 10-15 m2. Zebulon FE code.

14. A. Dereims, 8th July 2013 Industrialisation de simulations de procédés pour composites – couplages fluides / solides en grandes transformations, industrial/governmental funding (ESI Group), co-advisor Prof J.-M. Bergheau (ENISE/LTDS)

1/4 model of a T-stiffened panel – filling ratio over time and final porosity on the final deformed shape. PAM-RTM® FE code.

13. D. Pino-Muñoz, 26th October 2012, High-performance computing of the sintering at particle scale, co-advisors Ass. Prof J. Bruchon and Ass. Prof. F. Valdivieso. Awarded best 2012 Phd thesis for the Computational Structural Mechanics Association

Sintering by surface and volume diffusion at particle scale.

Regularisation strategies to grasp strong pressure gradients including Laplace’s law for a 2-particles set, and RIGHT – sintering of a grain stacking. HPC computing with CIMLIB FE code.

12. Y. Hou, 25th October 2012 In-plane air permeability characterization for LCM processing of composites, European project INFUCOMP, co-advisor Prof. C. Binetruy (ENSTIM Douai, now Ecole Centrale de Nantes-GeM).

Air-permeability characterisation.

Air-permeability bench and RIGHT – measurements comparisons with liquid permeability results obtained by Comas-Cardona et al.

11. M. Waris, 24th Septembre 2012 Mise en oeuvre, instrumentation, validation et modélisation d’un système d’injection RTM pour la fabrication de structures composites de hautes performances, LCM-SMART national project, initial supervisor Prof. A. Vautrin

Residual strain measured using optical fibre sensors (Bragg grating) during a composite thermo-mechanical manufacturing cycle – compaction, injection, curing; effect of the mold constitutive material on the residual strain level. Validated by residual curvatures on [0/90] plates.

10. O. Klinkova, June 2012 Modélisation de l’usinage de composites et effets sur la redistribution des contraintes internes dues à la cuisson, LCM-SMART national project, co-advisor Prof J.-M. Bergheau (ENISE/LTDS) 2008-2012. Awarded best PhD student for SAMPE France and SAMPE Europe in 2011; selected for SAMPE World conference.

Thermo-mechanical approach of composite manufacturing – curing and post-curing. LEFT – prediction of the residual stress in a 90°-angle composite part,

Effect of machining on internal stresses using an equivalent thermo-mechanical loading. Sysply® FE code.

9. G. Pacquaut, 9th December 2010 Modélisation numérique des frontières mobiles dans le cas du  transport / diffusion au cours de procédés d’élaboration directe, co-advisor Ass. Prof J. Bruchon

Coupling fluid, porous, and solid mechanics to model infusion-bases processes : thickness variations and filling (blue=air, red=resin). Zebulon FE code.

8. P. Wang, January 2010 : Etude numérique et expérimentale des procédés d’élaboration de matériaux composites par iunfusion de résine, co-advisors Prof. A. Vautrin and Ass. Prof J. Molimard. Industrial collaboration with Hexcel and ESI Group.

Flow front position during resin-infusion based processes : comparison of experimental positions detected with thermo-couple sensors, with numerical simulations results using permeability data depending, or not, on local porosity. PAM-RTM® FE code.

6. P. Celle, December 2006 : Couplages fluide/milieu poreux en grandes déformations pour la simulation des procédés d’élaboration par infusion, co-advisor Prof J.-M. Bergheau (ENISE/LTDS)

Infudison-based processes modelling.

Mechanistic framework for coupling fluid, solid, and porous mechanics in non-isothermal conditions, and RIGHT – initial conditions and pressure-velocity distributions after vacuum pulling and resin infusion. PAM-RTM® software

3. O.Elbouazzaoui,  January 2004 : Modélisation thermo-mécanique et physique du process de fabrication de NC2 par infusion related to a regional project NC2 with Hexcel, supervision 90 %, with Prof. A.Vautrin.

Transient transverse permeability measurement facility using optical fibre sensors and corresponding results – along with stationary measurement results- for stitched biaxial NC2® materials.


7. L. Bouten, March 2009 : Identification des propriétés mécaniques des tissus constitutifs du mollet pour l’étude mécanique de la contention, industrial collaboration  with BV-Sport

Section of a human leg with lipidous tissues reconstructed from MRI images, and corresponding pressure distribution obrained by FE models. Zebulon FE code.

5. G. Fleury, December 2006 : Etude, conception, et realisation en technologie MEMS d’un commutateur mécaniquement bistable, CEA funding, co-advisor Prof. R. Fortunier.

Bi-stable MEMs commutator for bio-medical applications

4. I. Gaied, December 2004 : Modélisation et prévision des distributions de pressions générées par les articles de contention sur les membres humains inférieurs, industrial collaboration with Sigvaris.

Stocking pressure generated by for compression garments.

measurements, and RIGHT predictions (Laplace’s law and Abaqus simulations) using bi-axial non-linear cosntitutive laws identified for the garment soft Diaphane 2®

Mechanics of Materials and Instabilities

17. D. Al Akhrass, 27th January 2014, Robust numerical strategies to compute the response of energetic facilities undergoing severe loadings, industrial/governmental funding (EDF R&D), co-advisor Ass Prof. J. Bruchon, 2010-2013

Distribution with three-fileds mixed P2/P1/P1 elements of (a) the hydrostatic pressure at Gauss points and of (b) the Lagrangian multiplier p at nodes, for a scour in an inlet valve body

2. L.Léotoing, November 2001 : Modélisation du flambage global, local et interactif dans les structures sandwich en compression, supervision 80 % with Prof. A.Vautrin, ENSMSE.

Effect of the initial imperfection on the stability response of an elasto-plastic sandwich beam designed against interactive buckling, i.e. optimized configuration defined using analytically-based design-diagram. Abaqus FE code.

1. L.Dufort, January 2000 : Étude expérimentale et théorique du gauchissement des sections dans les poutres composites, supervision 30 % (Prof. M. Grédiac, LARAMA, Clermont-Ferrand, France).

Wrapping in composite and sandwich beams under 3-point bending. LEFT – shear strain distribution for a composite beam (a) analytical field fro higher-order theory and (b) contacless measurements, and RIGHT – displacement fields (a) longitudinal and (b) transverse, for a sandwich beam