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

  • A review of characteristic lengths in the coupled criterion framework and advanced fracture models
    By : Molnar, Gergely, Doitrand, Aurelien, Estevez, Rafael, Gravouil, Anthony
    COMPTES RENDUS MECANIQUE - Published : 2025
  • Study of load distribution and ellipse truncation for angular contact pitch bearings-blade assembly subjected to external loads
    By : Duquesne, Remy, Nelias, Daniel, Morterolle, Sebastien, Ancey-Rocchi, Stella
    TRIBOLOGY INTERNATIONAL - Published : APR 2025
  • Influence of symmetry breaking on the multi-stable responses of a vibro-impact system: Experimental and numerical investigation
    By : Zuniga, Pau Becerra, Baguet, Sebastien, Prabel, Benoit, Grenat, Clement, Dufour, Regis
    MECHANICAL SYSTEMS AND SIGNAL PROCESSING - Published : MAR 1 2025
  • An ultra-sensitive diamagnetic levitation accelerometer with quasi-zero-stiffness structure
    By : Wang, Yang, Xu, Yuanping, Yang, Lu, Zhou, Jin, Mahfoud, Jarir, Jin, Chaowu
    MEASUREMENT - Published : MAR 15 2025
  • Development of decision support tools by model order reduction for active endovascular navigation
    By : Badrou, Arif, Duval, Arnaud, Szewczyk, Jerome, Blanc, Raphael, Tardif, Nicolas, Hamila, Nahiene, Gravouil, Anthony, Bel-Brunon, Aline
    ARTIFICIAL INTELLIGENCE IN MEDICINE - Published : MAR 2025
  • Analysis of stress intensity factor oscillations in 3D cracks using domain integrals and the extended finite element method
    By : Gonzalez-Albuixech, Vicente F., Giner, Eugenio, Gravouil, Anthony
    COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING - Published : MAR 1 2025
  • Chemo-Enzymatic Synthesis of Mixed Docosahexaenoic Acid Phosphatidylcholine Conjugates
    By : Lehoux, Jordan, Grosjean, Felix, Lobo, Alexandre, Lagarde, Michel, Bernoud-Hubac, Nathalie, Durand, Thierry, Crauste, Celine
    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY - Published : MAR 5 2025
  • Truncation effects on circular EHL contact film thickness
    By : Patrigeon, Tristan, Philippon, David, Devaux, Nicolas, Morales-Espejel, Guillermo E., Fillot, Nicolas
    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY - Published : FEB 2025
  • Quantifying the effect of material stiffness and wall thickness on the mechanical properties of ankle-foot orthoses manufactured by material extrusion
    By : Delbruel, Valentine, Banoune, Abder, Tardif, Nicolas, Duchet-Rumeau, Jannick, Elguedj, Thomas, Chevalier, Jerome
    PROGRESS IN ADDITIVE MANUFACTURING - Published : FEB 2025
  • Spatial Abilities and Endodontic Access Cavity Preparation: Implications for Dental Education
    By : Collet, Philippine, Tra, Robenson, Reitmann, Anna, Valette, Sebastien, Hoyek, Nady, Maurin, Jean-Christophe, Ducret, Maxime, Villat, Cyril, Santamaria, Julie, Richert, Raphael
    EUROPEAN JOURNAL OF DENTAL EDUCATION - Published : FEB 2025

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