Course detail

Elastohydrodynamics

FSI-9EHDAcad. year: 2020/2021

The overall aim of this course is to provide students with a general and useful introduction to the main concepts and principles of elastohydrodynamic (EHD) lubrication. It is the mechanism of lubrication that describes the separation by a lubricant film between two elastic non conforming machine elements loaded against each other, and in relative motion. The course covers introduction to EHD lubrication, the fundamentals required in understanding EHD lubrication and in-depth study of selected topics related to EHD lubrication.

Language of instruction

Czech

Number of ECTS credits

0

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

After completing the course the student manages the theoretical solution of essential problems associated with the EHD lubrication regime.

Prerequisites

General courses on mechanics, machine design, material sciences and hydromechanics.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Lectures, seminars, self-study.

Assesment methods and criteria linked to learning outcomes

The evaluation of students is based on the solution of four tasks in the field of contact problems, elastohydrodynamic lubrication, fluid film friction and wear.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The aim of the course is to introduce students to theoretical fundamentals of elastohydrodynamic lubrication regime.

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

Teaching has a form of consultation and discussion on a given theme at arranged times.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Stachowiak, G. W., A. W. Batchelor. Engineering Tribology. 4th edition. Boston: Butterworth-Heinemann, 2014. [cit. 2019-08-30] ISBN 0123970474. [Online] Dostupná z: https://app.knovel.com/hotlink/toc/id:kpETE00005/engineering-tribology/engineering-tribology
Gohar, R., H. Rahnejat. Fundamentals of Tribology. 1st edition. London: Imperial College Press, 2008. ISBN: 1-84816-184-0.
Gohar, R. Elastohydrodynamics. 2nd edition. London: Imperial College Press, 2001. ISBN 1-86094-170-2.

Recommended reading

Dowson, D. History of Tribology. 1st edition. London: Professional Engineering Publishing, 1998. ISBN 1-86058-070-X.
Hamrock, B. J. Fundamentals of Fluid Film Lubrication. 1st edition. New York: McGraw-Hill Inc., 1994. ISBN 0-07-025956-9.

Classification of course in study plans

  • Programme D-KPI-P Doctoral, 1. year of study, winter semester, recommended

Type of course unit

 

Lecture

20 hours, compulsory

Teacher / Lecturer

prof. Ing. Martin Hartl, Ph.D.

Syllabus

1. Material Properties. Lubricant Rheology.
2. Elastostatic Contacts.
3. Governing Equations of EHD Lubrication.
4. Simple Concepts of Non-conforming Contact Lubrication.
5. Numerical Methods for EHD Lubrication Problem Solution.
6. Friction and Non-linear Lubricant Behavior in EHD Contacts.
7. Stress and Fatigue in EHD Contacts.
8. Micro-EHD lubrication and mixed EHD lubrication.
9. Transient EHD lubrication.
10. Temperature and Abnormal Phenomena.