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Computational Solid Mechanics team

CSM team

 

Responsible:

Katia Mocellin

 


Researchers:

François Bay
Pierre-Olivier Bouchard
Lionel Fourment
Elisabeth Massoni
Daniel Pino Munoz
Yannick Tillier
Nathalie Brulat Bouchard ( Associate researcher - Faculty of Dentistry)


 

 

Research domains:

Numerical methods, Solid mechanics, Optimization and inverse analysis, Damage and Fracture, Biomechanics


Applications:

Metal forming, Living and biocompatible material, induction heating and electromagnetic forming

 

photos homepage équipe CSM CEMEF
Vidéo 1 Crack Vidéo 2 SPS Vidéo 3 Stage2-damage Vidéo 4 Usinage Seq

CSM team main objectives:

CSM Team aims at developing numerical methods, mechanical models and methodologies for solid mechanics problems. The dedicated approach consists in considering the whole process development of a part or a component to predict and optimize in life properties integrating the thermomechanical history of the material.


 

Projects:

  • Projet ANR OPTIMUM – Optimisation of linear friction Welding of multimaterial joining for aeronautical applications ( February 2015- February 2019: : UTC, Centre des Matériaux MINES ParisTech, ACB, Airbus Group Innovation) – Computational and experimental study of dissimilar materials joining. CSM Team is in charge of the computational part of the project.

  • PROJET ECOS-SUD – (Universidad Católica de Chile » in collaboration with « Universidad Nacional de Rosario » Argentina ) (2017-2020) Development of non-conventional testing on plane samples to study the influence of loading paths on formability. CSM Team is in charge of developing material behavior and damage models.

 

Equipments and software of MSR team:

  • Forge® + Matelec, Cimlib®

  • Magnetic forming device
    Machine de formage magnétique
    Magnetic pulse forming system for metal processing comprising a 20 kJ/9kV generator, a device for plane magnetic pulse forming and a 'pancake'-like forming coil.
    The main goal is to perform validation tests for numerical computational tools developed at Cemef, as well as characterization of material behavior at high strain rates.

  • Biaxial tension machine
    Machine de traction bi-axiale
    The biaxial tension test was designed and developed in CEMEF. It is coupled with a Digital Image Correlation system and is based on the use of a confocal laser microscopy system (laboratoire Hubert Curien, pôle Optique et Vision de Saint-Etienne).

  • "Pince Rhéobiol"
    Pince Rhéobiol

    This portable characterization device was developed to allow biological tissue characterization just after sampling.

Research areas:

  • To model and to characterize material

  • From damage to fracture

  • Numerical methods development (CPU time reduction, finite elements formulation, steady state processes)

  • Inverse Analysis and optimization

  • Modeling of complex processes (multiphysics coupling)

  • Biomechanics

 

Key-words:

Finite elements, non linear mechanical problems, CPU time reduction, mesh adaptation, solid material behavior, biomechanics, damage

 

Academic relations:

  • MIT – Prof. D Parks
  • Centre des Matériaux - MINES ParisTech
  • Mateis – INSA Lyon
  • SIGMA – Prof E. Duc
  • CHU Nice

 

Industrial relations:

  • Aubert et Duval
  • Faurecia
  • Renault
  • Transvalor


Key-fact of the team:


Numerical methods for CPU time reduction in an industrial software

 

Reducing computational time is still an important issue for simulation of forming processes ; to complete a computation till the end of the process keeping a sufficient accuracy within a reasonable CPU time or within the framework of inverse analysis and optimization where several computational are needed to design a forming sequence or identify some behavior law parameters. Several numerical methods were then developed based on the particularities of some processes like Arbitraty Lagrangian or eulerian Formulation or multi mesh approach. The key point of these works is to keep the compatibility with the Forge® software, particularly use of non-structured mesh based on linear tetrahedral elements, large deformation of material, frequent remeshing associated to mechanical fields transport and parallel computation.

CSM key-facts

Publications  2012 – 2017 :

Publications in journals

List of  internationals conferences

 

 

Interactions with the CEMEF following teams:

  • MSM (Damage and fracturee)
  • TMP (Powder compaction)
  • CFL (electromagnetic stirring)
  • PSP (microelectronics))

 

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