Course detail

Tribology

FSI-ZTRAcad. year: 2011/2012

The overall aim of the course is to provide students with theoretical and practical knowledge of friction, wear and lubrication processes that take place in mechanical engineering systems and play important role at machine design, production and maintenance. The course is focused on the following topics: Surface interaction and friction theory; Tribological properties of materials; Lubricant and their properties; Hydrodynamic, hydrostatic, elastohydrodynamic, mixed and boundary lubrication; Nano- and microtribology; Tribology application in mechanical design.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

prof. Ing. Martin Hartl, Ph.D.

Department

Institute of Machine and Industrial Design (ÚK)

Learning outcomes of the course unit

Theoretical and practical knowledge of friction, wear and lubrication processes on the macro- and microscopic scale. Their application in mechanical engineering design. Materials and lubricant selection from the point of minimization and elimination of losses resulting from friction and wear.

Prerequisites

Students are expected to have knowledge acquired by regular completion of the following courses: Machine Elements and Mechanisms I (5CK), Machine Elements and Mechanisms II (6C2), Machine Elements and Mechanisms III (6C3), Micro and Nanotechnology (ZMN).

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Course-unit credit is awarded on the following conditions: active participation in the seminars and good results of elaborated laboratory a computional exercises. Examination consists of a written test and an oral presentation of the case study solution.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The course covers fundamental principles of tribology, multidisciplinary science which focuses on interacting surfaces in relative motion. The main attention is paid to the machine lubrication.

Specification of controlled education, way of implementation and compensation for absences

Attendance at lectures is recommended, attendance at seminars is mandatory. The lessons are planned on the basis of a weekly schedule. The way of compensation for an absence is fully at the discretion of the teacher.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

STACHOWIAK, G. W. a A. W. BATCHELOR. Engineering tribology. Fourth edition. Oxford: Elsevier/Butterworth-Heinemann, 2014. [cit. 2019-08-30] ISBN 0123970474. [Online] Dostupná z: https://app.knovel.com/hotlink/toc/id:kpETE00005/engineering-tribology/engineering-tribology (EN)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme M2I-P Master's

    branch M-KSI , 1. year of study, winter semester, compulsory

Type of course unit

 

Lecture

10 hours, optionally

Teacher / Lecturer

prof. Ing. Martin Hartl, Ph.D.

Syllabus

1. Introduction to tribology, its significance and historical development. Tribological system and processes.
2. Topography of engineering surfaces, its description and measurement.
3. Contact mechanics of ideal and real surfaces. Hertz and Greenwood-Williamson theory of surface contacts.
4. Deformation and adhesion theory of friction. Experimental determination of friction coefficient.
5. Types of wear mechanisms. Wear measurement.
6. Regimes of fluid film lubrication. Lubricants and their composition and properties.
7. Hydrodynamic lubrication. Reynolods equation and its numerical solution.
8. Elastohydrodynamic lubrication. Determination of lubricant film thickness in rolling bearings, gears and traction drives.
9. Partial elastohydrodynamic lubrication (mixed lubrication). Experimental observation of lubricant film.
10. Boundary lubrication. Mechanisms of boundary film formation. Lubricant additives.
11. Micro- and nano- tribology. Friction, wear and lubrication in microelectromechanical systems.
12. Tribological system design.

Computer-assisted exercise

13 hours, compulsory

Teacher / Lecturer

prof. Ing. Martin Hartl, Ph.D.

Syllabus

1. Elastostatic contacts. Hertzian contact theory.
2. The Reynolds equation and its numerical solution.

labs and studios

13 hours, compulsory

Teacher / Lecturer

prof. Ing. Martin Hartl, Ph.D.

Syllabus

Case study focused on one of the following topics:
1. Topography of engineering surfaces, its description and measurement.
2. Viscosity measurements with capillary, 'Falling Ball' and rotational viscometers.
3. Measurement of friction coefficient.
4. Demonstration of pressure distribution across the film of oil in a Michell tilting pad slider
bearing.
5. Aerodynamic gas bearing demnostration.