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

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

  • Numerical and experimental characterization of high-temperature heat transfer in a ceramic foam with dual-scale porosity
    By : Low, Z. K., Blal, N., Baillis, D.
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER - Published : MAY 1 2024
  • In-situ ultrasonic viscometry of lubricants under temperature and shear
    By : Peretti, G., Bouscharain, N., Dorr, N., Ville, F., Dwyer-Joyce, R. S.
    TRIBOLOGY INTERNATIONAL - Published : MAR 2024
  • Influence of a transmission oil degradation on physico-chemical properties and tribological performance
    By : Duran, Busra, Cavoret, Jerome, Philippon, David, Ville, Fabrice, Ruellan, Arnaud, Berens, Frank
    TRIBOLOGY INTERNATIONAL - Published : MAR 2024
  • Analysis of enhanced heat transfer performance of the functional cage
    By : Wei, Chunhui, Wu, Wei, Wang, Yunduo, Nelias, Daniel, Yuan, Shihua
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER - Published : FEB 2024
  • A new constitutive model for salt rock under cyclic loadings based on state variables
    By : Tang, Luxuan, Fan, Jinyang, Li, Zongze, Chen, Jie, Liu, Wei
    GEOENERGY SCIENCE AND ENGINEERING - Published : FEB 2024
  • Laun's rule for predicting the first normal stress coefficient in complex fluids: A comprehensive investigation using fractional calculus
    By : Das, Mohua, Rathinaraj, Joshua David John, Palade, Liviu Iulian, McKinley, Gareth H.
    PHYSICS OF FLUIDS - Published : JAN 2024
  • Optimization of energy efficiency and NVH behaviour of a helical gear unit
    By : Ben Younes, Emna, Rigaud, Emmanuel, Perret-Liaudet, Joel, Bruyere, Jerome, Changenet, Christophe
    MECHANICS & INDUSTRY - Published : JAN 22 2024
  • Computational Model of Effective Thermal Conductivity of Green Insulating Fibrous Media
    By : Sankara, Hamidou, Baillis, Dominique, Coulibaly, Ousmane, Coquard, Remi, Naouar, Naim, Saghrouni, Zahia
    MATERIALS - Published : JAN 2024
  • Energy Transfer in Mixed Lanthanides Complexes: Toward High-Performance Pressure Sensors Based on the Luminescence Intensity Ratio
    By : Zhou, Yujiao, Ledoux, Gilles, Bois, Laurence, Pilet, Guillaume, Colombo, Margherita, Jeanneau, Erwann, Lafarge, Lionel, Journet, Catherine, Descartes, Sylvie, Philippon, David
    ADVANCED OPTICAL MATERIALS - Published : JAN 4 2024
  • Power Loss Analysis of an Oil-Jet Lubricated Angular Contact Ball Bearing: Theoretical and Experimental Investigations
    By : Darul, Lionel, Touret, Thomas, Changenet, Christophe, Ville, Fabrice
    LUBRICANTS - Published : JAN 2024