Mechanical Engineering

The classes will be focused on both basic knoweledge and its application to industrial and social issues. • Introduction and link with the basic knowledge: from the classical contact models to tribology of actual contacts. • Fundamentals of Tribology in social and industrial issues: friction and wear, dry and lubricated contacts, solid and fluid lubrication, condition and surface properties. • The concept of the tribological triplet (mechanism, first bodies in contact, third body) for the analysis and resolution of a contact problem. • Rheological model of a contact: mass balance and energy balance. • Introduction to hydrostatic, hydrodynamic, elastohydrodynamic lubrication and Stribeck curve; application to the gears and bearings. • Critical analysis of a contact problem: different temporal and spatial scales, diversity and competition of physical phenomena. • Resolution of tribological problems by numerical and experimental tribology; advantages, disadvantages and limitations of the numerical and experimental methods. • Numerical Tribology: Example of the development of numerical models for the simulation of contacts; Algorithms and contact laws; Analysis of the convergence of results: local analysis at the contact and structural analysis. FEM models, discrete models (DEM) and molecular dynamics (MD) • Experimental Tribology: Methods and systems of measurement in tribology; Instrumentation of a contact; Examples of analysis and post-mortem interpretation of the contact surfaces. • Biotribology • During the classes, examples of possible strategies of contact problems resolution will be provided: modification of the mechanical system, modification of surfaces or materials in contact, introduction of fluid or solid third body, changing boundary conditions (temperature, vibration or magnetic fields, ...).

No specific requirements. A good knowledge of mechanics is suggested.

Slides presented during the classes, available on the website of the Course. Engineering Tribology, Third Edition 3rd Edition, Gwidon Stachowiak, Andrew W Batchelor.

The lessons include the presentation of methodological approaches, experimental and numerical, in parallel to industrial problems and their resolution.

Attendance strongly recommended.

Oral discussion on the issues presented during the classes, with the possibility to present an individual project of interest. To pass the exam the student must obtain a mark not less than 18/30. The student must demonstrate that he/she has acquired sufficient knowledge of the topics covered by the course program and that he/she is able to apply them to analyze and propose solutions to tribological problems. To achieve a score of 30/30 cum laude, the student must instead demonstrate that he/she has acquired excellent knowledge of all the topics covered during the course, being able to propose analysis approaches and methods of consistent resolution of the problems related to the course.

The lessons include the presentation of methodological approaches, experimental and numerical, in parallel to industrial problems and their resolution. Visits to the tribology laboratories are scheduled during the course.

The classes will be focused on both basic knoweledge and its application to industrial and social issues. • Introduction and link with the basic knowledge: from the classical contact models to tribology of actual contacts. • Fundamentals of Tribology in social and industrial issues: friction and wear, dry and lubricated contacts, solid and fluid lubrication, condition and surface properties. • The concept of the tribological triplet (mechanism, first bodies in contact, third body) for the analysis and resolution of a contact problem. • Rheological model of a contact: mass balance and energy balance. • Introduction to hydrostatic, hydrodynamic, elastohydrodynamic lubrication and Stribeck curve; application to the gears and bearings. • Critical analysis of a contact problem: different temporal and spatial scales, diversity and competition of physical phenomena. • Resolution of tribological problems by numerical and experimental tribology; advantages, disadvantages and limitations of the numerical and experimental methods. • Numerical Tribology: Example of the development of numerical models for the simulation of contacts; Algorithms and contact laws; Analysis of the convergence of results: local analysis at the contact and structural analysis. FEM models, discrete models (DEM) and molecular dynamics (MD) • Experimental Tribology: Methods and systems of measurement in tribology; Instrumentation of a contact; Examples of analysis and post-mortem interpretation of the contact surfaces. • Biotribology • During the classes, examples of possible strategies of contact problems resolution will be provided: modification of the mechanical system, modification of surfaces or materials in contact, introduction of fluid or solid third body, changing boundary conditions (temperature, vibration or magnetic fields, ...).

No specific requirements. A good knowledge of mechanics is suggested.

Slides presented during the classes, available on the website of the Course. Engineering Tribology, Third Edition 3rd Edition, Gwidon Stachowiak, Andrew W Batchelor.

The lessons include the presentation of methodological approaches, experimental and numerical, in parallel to industrial problems and their resolution.

Attendance strongly recommended.

Oral discussion on the issues presented during the classes, with the possibility to present an individual project of interest. To pass the exam the student must obtain a mark not less than 18/30. The student must demonstrate that he/she has acquired sufficient knowledge of the topics covered by the course program and that he/she is able to apply them to analyze and propose solutions to tribological problems. To achieve a score of 30/30 cum laude, the student must instead demonstrate that he/she has acquired excellent knowledge of all the topics covered during the course, being able to propose analysis approaches and methods of consistent resolution of the problems related to the course.

The lessons include the presentation of methodological approaches, experimental and numerical, in parallel to industrial problems and their resolution. Visits to the tribology laboratories are scheduled during the course.