Laboratoire de Mécanique des Contacts et des Structures

A joint research unit UMR5259 of the INSA Lyon and the CNRS, the role of LaMCoS is to carry out research on understanding and controlling the behavior of mechanical structures and systems by studying their interfaces.

We innovate to improve understanding of fundamental phenomena to anticipate major societal challenges and respond to technological problems in the fields of Transport, Energy, Health, Biomedicine, Sport and Machine Tools.

An overview of the scientific results of the laboratory

  • Silent wheel: Identification and control
  • Multiscale topological optimisation (PhD by T.Djourachkovitch)
  • Nonlinear vibrations of M/NEMS resonant sensors
  • Thermal memory effect
  • Hybrid vibration control
  • Diagnostic and monitoring of rotating parts in vehicles
  • Validation of the hybrid modular model: Comparison of tooth pressure with an EF model for thin-walled gears (source: CIFRE Safran Helicopter Engine...
  • <a href='./files/apercu_deroulant/pdf/11_EN.pdf'>'Measurement' of pressure spike & lubricant rheology</a>
  • Study of losses in transmission belts
  • LaMCoS 's DataCenter
  • Understanding the early detection of bearing defects in non-stationary conditions
  • Example of a multiparametric digital twin for welding (PhD by Y. LU, AREVA-SAFRAN-LAMCOS Chair)
  • Stress at the root of a spiral bevel gear
  • <a href='./files/apercu_deroulant/pdf/12_EN.pdf'>Textured cylinder-liner surface</a>
  • Control of rotating machinery supported by Active Magnetic Bearings (AMB)
  • Mesoscopic analysis of the compaction of a 3D reinforcement Experimental-simulation comparisons
  • Contact spalling
  • Nonlinear dynamics of on-board structure equipped with elastomer mounts
  • Optimisation of the shape and position of the ribs of an aircraft wing loaded in bending at constant mass. Compliance reduced by 80%
  • Deformations of the vascular structure under the effect of inserted tools (M. Menut PhD)
  • <a href='./files/apercu_deroulant/pdf/13_EN.pdf'>Pressure distribution between an oil control ring and a textured liner</a>
  • Study of plasticization in a micro-pillar of pure silica
  • Load passage for a rough contact on a granular mass and illustration of the maximum shear stress
  • Visco-elastic contact
  • Package drop test: forces on the protected object and energy distribution
  • Tactile perception
  • Numerical prediction of flow through a spur gear (Marchesse et al. 2015)
  • Distributed piezoelectric sensors for boundary forces measurements
  • Equivalent stress field generated by a rolling contact on a heterogeneous viscoelastic mass
  • Surface measured with roughness meter (Amplitude ~1 µm, surface size ~ 600 µm x 480 µm)
  • 2dof electromagnetic generator for railway applications
  • Molecular Dynamics simulation of ZDDP effects on friction in nano-scale lubricated contacts
  • Plane stresses in a part subjected to an explicit dynamic impact (source: Jean Di Stasio's Michelin CIFRE PhD)
  • 3D discrete simulation of wear flow in dry contact
  • Explicit-implicit co-simulation (Zebulon / Europlexus)
  • Simulation of rolling contact on an elastic-plastic heterogeneous mass
  • Phonons in a nanocomposite with different elastic contrasts simulated by Finite Elements
  • Pressure perturbations due to an indent crossing a contact
  • Explosion tests carried out at the DGA TN Tourris site
  • Hybrid vibration control
  • Lipid structures of synovial fluid in healthy and arterial cases
  • Bio-tribology for the prevention, diagnosis and early treatment of pathologies
  • Monitoring of Rotating Machines in evolving and unstable environnement: Application to wind turbines
  • Rotating machine on active magnetic bearings
  • Finite element simulation of the ballooning of a Zircaloy-4 sheath under conditions simulating a LOCA. Several physics involved, including elasto-v...
  • Tribological study of a bolted interface subjected to vibration: micro-slip and micro-detachment measured by image correlation
  • Equipex Phare
  • <a href='./files/apercu_deroulant/pdf/10_EN.pdf'>Efficient multigrid FE solver</a>
  • Boundary layer in an EHL contact
  • Rotor demonstrator on PMA
  • Shear angles during thermoforming of thermoplastic prepregs Experimental-simulation comparisons
  • Advanced Chebyshev expansion for identification on continuous structures
  • Multiscale topological optimisation (PhD by T.Djourachkovitch)
  • Active control of embedded electronic cards
  • Velocity vectors in a carotid artery in healthy and pathological cases
  • Elasto-Visco-Plastic Buckling of Thick Shell [Jacquet et al. 2021]
  • Flange roller-end contact: numerical (FEM) vs experimental (interferometry) values of the lubricant film thickness (Trybogyr)
  • Adhesive contact
  • Original electrical application architecture with strong electro-magnetic-mechanical coupling (© Leroy-Somer)
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The last 10 publications of the laboratory

  • Vibration attenuation of dual periodic pipelines using interconnected vibration absorbers
    By : Iqbal, Mohd, Jaya, Mahesh Murugan, Savadkoohi, Alireza Ture, Baguet, Sebastien
    ENGINEERING STRUCTURES - Published : JAN 1 2025
  • Numerical and experimental investigations on the dynamic behavior of a rotor-AMBs system considering shrink-fit assembly
    By : Zhou, Yang, Xu, Yuanping, Zhou, Jin, Zhang, Yue, Mahfoud, Jarir
    MECHANICAL SYSTEMS AND SIGNAL PROCESSING - Published : JAN 1 2025
  • Stochastic optimization of a mass-in-mass cell with piecewise hybrid nonlinear-linear restoring force
    By : Zanin, C. da Silveira, Missoum, S., Savadkoohi, A. Ture, Baguet, S., Gourdon, E., Dufour, R.
    JOURNAL OF SOUND AND VIBRATION - Published : JAN 20 2025
  • A solid-beam approach for mesoscopic analysis of textile reinforcements forming simulation
    By : Lacroix, Baptiste, Colmars, Julien, Platzer, Auriane, Naouar, Naim, Vidal-Salle, Emmanuelle, Boisse, Philippe
    MATERIAL FORMING, ESAFORM 2024 - Published : 2024
  • Draping of biaxial non-crimp fabric on hemispherical shape
    By : Zheng Ruochen, Naouar, Naim, Schaefer, Bastian, Platzer, Auriane, Colmars, Julien, Kaerger, Luise, Boisse, Philippe
    MATERIAL FORMING, ESAFORM 2024 - Published : 2024
  • Investigation of the friction behavior of uni- and bidirectional non-crimp fabrics
    By : Schafer, Bastian, Naouar, Naim, Karger, Luise
    MATERIAL FORMING, ESAFORM 2024 - Published : 2024
  • Energy Exchanges in a Nonlinear Meta-Cell
    By : Zanin, Camila da Silveira, Savadkoohi, Alireza Ture, Baguet, Sebastien, Dufour, Regis
    PERSPECTIVES IN DYNAMICAL SYSTEMS I-APPLICATIONS, DSTA 2021 - Published : 2024
  • Tooth friction in spur gear transmission. From local to mean tooth friction loss
    By : Diab, Yasser, Touret, Thomas, Ville, Fabrice, Changenet, Christophe
    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY - Published : DEC 2024
  • Experimental analysis of the forming behavior of uni- and bidirectional non-crimp fabrics for different geometries
    By : Schaefer, Bastian, Zheng, Ruochen, Colmars, Julien, Platzer, Auriane, Naouar, Naim, Boisse, Philippe, Kaerger, Luise
    COMPOSITES PART B-ENGINEERING - Published : DEC 2024
  • Extended crack propagation in nitrided and carburised steels subject to rolling contact fatigue
    By : Lecouffe, A., Kleber, X., Ville, F., Cavoret, J., Zamponi, L., Ruellan, A.
    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY - Published : DEC 2024

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