• PLENARY AND KEYNOTE SPEAKERS

  • PLENARY SPEAKERS
    Jay FINEBERG  
    The Hebrew University, Jerusalem, Israel
    Jean-François JOANNY  
    Collège de France, France

    The aim of this presentation is to review the role of friction in cell and tissue mechanics at various scales: at the molecular scale of the proteins, at the cellular scale and at the more macroscopic scale of a tissue.

    Valérie MASSON-DELMOTTE
    Commissariat à l'énergie atomique et aux énergies alternatives (CEA), France
    Co-President of Workgroup I of Intergovernmental Panel on Climate Change (IPCC)

    "What is the state of knowledge on global climate change: observations, process-based understanding, projections?"
    Nicholas D. SPENCER  
    ETH Zürich, Switzerland

    Cartilage is an extraordinary material that allows our joints to move with low friction and wear, often for many decades. Imitating cartilage with polymer brushes and gels has a number of purposes: It can help us understand more about the lubrication mechanism of cartilage itself; it is a necessary step for the development of improved replacement materials for cartilage that is damaged; and finally, the soft, highly lubricious materials developed can have many potential applications in industry and medicine.

    KEYNOTE SPEAKERS
    Zhou FENG  
    Lanzhou Institute of Chemical Physics, China

    Inspired by the excellent surface hydration lubrication mechanism, typical layered biochemical feature and the adaptive load-bearing/stress dissipation route of natural articular cartilage, a series of novel layered cartilage lubrication materials have been designed by soft/hard combination strategy. These novel materials exhibit high load-bearing, low friction and excellent wear-resistance properties, as well as remarkable lubrication performance of cartilage. Those novel design, inspired by nature would provide new route for the development of high-performance water-based lubrication materials.

    Michael MOSELER  
    University of Freiburg, Germany

    The increasing demand for sustainable tribology has accelerated the development of environmentally friendly lubrication solutions such as water-related lubricants in combination with carbon or ceramic surfaces under boundary lubrication conditions. Atomistic simulations reveal superlubricity mechanisms for glycerol- lubricated tetrahedral amorphous carbon (ta-C) [1] and Si3N4 [2]. In our quantum molecular dynamics (MD) simulations glycerol concurrently chemisorb on both tribopartners and bridge the tribogap. Sliding-induced mechanical strain triggers complete fragmentation of the lubricant. In the case of ta-C surfaces, superlubric graphenoid passivation layer forms. For Si3N4 surfaces, glycerol’s oxygen reacts with Si to silica, while the carbon forms superlubric disordered graphene-nitrides. Both results are supported by experiments.

    Hong LIANG  
    Texas A&M University, United States

    Wear of materials remains to be one of the most costly failures of products. This is particularly so for systems in motion, such as total joint replacement, passenger cars, and manufacturing machines where mechanical impacts and environmental attack pose challenges to rubbing components. However, the current design of structural materials has been primarily focused on the hardness as the sole property. The increased hardness associates with brittle fracture that leads to severe loss of materials. In this presentation, discussion will be given on the nature of conflicts between hardness and toughness of materials. This leads to the advantages in composites and multi-phase materials. Further discussion will be about the microstructural design of quasicrystal alloys and their effects on mechanical properties and wear performance. It will be revealed that by microstructural design and adding toughness in certain phases, it is possible to predict the failure and to achieve ultimate resistance to wear.

    Luis SAN ANDRES  
    Texas A&M University, United States

    The lecture presents measurements of leakage and dynamic force coefficients for six distinct annular pressure seals operating with an air in oil mixture ranging from pure liquid to just air. The comprehensive test campaign reveals the salient characteristics of various annular pressure seal configurations, thus aiding to better design multiple-phase flow centrifugal pumps.

    PLATINUM SPONSOR SPEAKERS
    Sophie BIRÉ
    Vice-President R&D Fuels and Lubricants, TotalEnergies OneTech, France
    Bernie van LEEUWEN
    Director Research and Technology Development, SKF, The Netherlands
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