A MULTIDISCIPLINARY PLATFORM FOR FUTURE TRIBOLOGICAL MODELLING

未来摩擦学建模的多学科平台

• 批准号: EP/N025954/1
• 负责人: Daniele Dini
• 金额: $ 153.58万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN025954%2F1
• 关键词: MULTIDISCIPLINARY; PLATFORM; FUTURE; TRIBOLOGICAL; MODELLING

Almost all engineering systems and many biological ones contain components that are loaded and rub against one another, such as gears and bearings in machines and hip and knee joints in humans. This rubbing results both in friction, that wastes energy, and in wear and other forms of surface damage that lead to machine (and human) downtime, and the need for expensive repair and replacement. This whole field of research is called Tribology and is pivotal both in the quest for sustainability, including reducing CO2 emissions, and in improving the quality of our lives.In Tribology the effects of rubbing, such as frictional dissipation and wear, are perceived as macroscale phenomena and are traditionally studied by macroscale experiments and analysis. However they actually originate at the atomic and molecular scale, where the severe local stresses produced by rubbing cause restructuring of surface layers, while the molecules of lubricant in rubbing contacts interact with and protect surfaces. Thus to understand and so improve tribological systems we need an approach that spans the molecular, meso- and macro-scales. This will yield both information as to the origins of friction and surface damage - and unwanted phenomena are best tackled at their roots - as well as the ability to design macro-scale components such as lubricants, bearings, gears, engines and replacement joints that operate reliably and efficiently for as long as required.To meet this need, the proposed research will develop and apply advanced techniques to model rubbing contacts at all the necessary scales - atomic/molecular simulations of surfaces and lubricants, meso-scale modelling looking at structural evolution of surfaces due to rubbing, and macro-scale simulations of actual rubbing components such as bearings and engines. These simulations will be validated by experiments that also span the same range of scales, including direct observation of molecules in rubbing contacts. The most critical and innovative stage of this project, however, will be to link all these models together in to a single computer-based package. The result will be a set of modelling programs that can be used in many different ways; for example to explore the origins of tribological phenomena; to optimise lubricant surface and materials design; to predict performance of machines based on a combination of design and underlying atomic/molecular processes.Such an approach will give us tools both to understand in full tribological phenomena such as friction and wear and to enable effective "virtual testing", where new and novel designs, lubricants and surfaces can be combined and their effectiveness tested prior to recourse to time-consuming and expensive experimental development.

几乎所有的工程系统和许多生物系统都包含相互加载和相互摩擦的部件，例如机器中的齿轮和轴承，以及人类的髋关节和膝关节。这种摩擦既会造成摩擦，浪费能量，又会导致磨损和其他形式的表面损坏，导致机器(和人)停机，并需要昂贵的维修和更换。这一整个研究领域被称为摩擦学，在寻求可持续性(包括减少二氧化碳排放)和改善我们的生活质量方面都是关键。在摩擦学中，摩擦的影响，如摩擦耗散和磨损，被认为是宏观现象，传统上通过宏观实验和分析来研究。然而，它们实际上起源于原子和分子尺度，摩擦产生的严重局部应力导致表层重组，而摩擦接触中的润滑剂分子与表面相互作用并保护表面。因此，为了理解并改进摩擦学系统，我们需要一种跨越分子、细观和宏观尺度的方法。这将产生关于摩擦和表面损坏的来源的信息--最好从根本上解决不想要的现象--以及设计能够可靠和有效地运行所需时间的宏观部件，如润滑剂、轴承、齿轮、发动机和更换关节的能力。为了满足这一需求，拟议的研究将开发和应用先进的技术来在所有必要的尺度上模拟摩擦接触-表面和润滑剂的原子/分子模拟，观察摩擦表面结构演变的介观模拟，以及实际摩擦部件的宏观模拟，如轴承和发动机。这些模拟将通过同样范围内的实验来验证，包括直接观察摩擦接触中的分子。然而，该项目最关键和最具创新性的阶段将是将所有这些模型连接到一个基于计算机的一揽子计划中。其结果将是一套可用于多种不同方式的建模程序；例如，探索摩擦学现象的起源；优化润滑剂表面和材料设计；基于设计和潜在的原子/分子过程的组合来预测机器的性能。这种方法将为我们提供工具，既可以全面了解摩擦和磨损等摩擦学现象，也可以实现有效的“虚拟测试”，即在求助于耗时且昂贵的实验开发之前，可以将新的和新颖的设计、润滑剂和表面结合在一起，并测试其有效性。

项目成果

OVINE KNEE KINEMATICS AND CONTACT PRESSURES OF A NOVEL FIBRE MATRIX-REINFORCED HYDROGEL TOTAL MENISCUS REPLACEMENT

新型纤维基质增强水凝胶全半月板置换术的羊膝关节运动学和接触压力

• DOI: 10.1302/1358-992x.2023.9.014
• 发表时间: 2023
• 期刊: Orthopaedic Proceedings
• 作者: Bartolo M

How does roughness kill adhesion?

粗糙度如何消除粘附力？

• DOI: 10.1016/j.jmps.2023.105465
• 发表时间: 2023
• 期刊: Journal of the Mechanics and Physics of Solids
• 影响因子: 5.3
• 作者: Afferrante L

Series Active Variable Geometry Suspension application to comfort enhancement

• DOI: 10.1016/j.conengprac.2016.11.011
• 发表时间: 2017-02
• 期刊: Control Engineering Practice
• 影响因子: 4.9
• 作者: C. Arana;S. Evangelou;D. Dini

Polymer brushes for friction control: Contributions of molecular simulations.

• DOI: 10.1116/6.0002310
• 发表时间: 2023-01
• 期刊: Biointerphases
• 影响因子: 2.1
• 作者: Mohamed A Abdelbar;J. Ewen;D. Dini;S. Angioletti-Uberti

Advanced modelling of lubricated interfaces in general curvilinear grids

一般曲线网格中润滑界面的高级建模

• DOI: 10.1016/j.triboint.2023.108727
• 发表时间: 2023
• 期刊: Tribology International
• 影响因子: 6.2
• 作者: Ardah S