Courses

Tribology

General

Course Contents

Structure and decisive parameters of tribological systems.
Composition and geometrical characteristics of the technical surfaces.
Mechanical, chemical and thermal processes during sliding of contacting solid surfaces.
Types, mechanisms, parameters and laws of solid friction.
Frictional behaviour of the main technical materials (metals and alloys, ceramics, polymers, solid lubricants).
Transition phenomena in friction contacts.
Sliding and rolling friction, free rolling and traction rolling.
Types, mechanisms, parameters and laws of wear.
Behaviour of the main technical materials under wear conditions.
Hydrostatic, hydrodynamic, elastohydrodynamic, aerostatic and aerodynamic lubrication, marginal and partial lubrication.
The Reynolds equation.
Journal and roller bearings.
Solid lubrication.
Classification, properties and application of lubricants.

Educational Goals

– Understanding the physical processes and laws governing friction and wear in technical contacts, aiming to improving their durability, performance and effectiveness.
– Learning the behaviour of the main technical materials under friction and wear (metals and alloys, ceramics, polymers) in order to select the appropriate materials according to the operating conditions.
– Understanding the function and learning the theory of solid, fluid (hydrostatic, hydrodynamic, elastohydrodynamic) and gas lubrication.
– Getting familiar with the design, operation and application of the various types of bearings.
– Getting acquainted with the various types of lubricants in order to be able to select the appropriate lubricant for each application.

General Skills

Research, analysis and synthesis of data and information
Decision making
Autonomous work
Promoting free, creative and inductive thinking

Teaching Methods

Lectures
Exercises
Projected presentations
E-mail communication
Online synchronous and asynchronous teaching platform (moodle)

Students Evaluation

Assessment Language: Greek
Written final examination

Recommended Bibliography

https://moodle.teithe.gr/ pluginfile.php/17241/mod_resource/content/0/ΤΡΙΒΟΛΟΓΙΑ
• Ι.Μ. Hutchins, p. Shipway, Tribology, Friction and Wear of Engineering Materials, 2nd Ed., 2017, Butterworth-Heinemann, ISBN: 9780081009109
• B. Bhushan, Principles and Applications of Tribology, 2nd Ed., 2013, John Wiley & Sons, ISBN: 978-1-119-94454-6
• P.I. Blau, Friction Science and Technology: From Concepts to Applications, 2nd Ed., 2008, CRC Press, ISBN 9781420054040
• Wilfried Dresel, Theo Mang, Lubricants and Lubrication, 2017, Wiley-VCH, ISBN:9783527326709