Coursecode: wb5303
Coursename: Tribology

DUT creditpoints: 2
ECTS creditpoints: 3
Subfaculty of Mechanical Engineering and Marine Technology
Lecturer(s): Beek, dr.ir.A.van

Tel.: 015-2786984
Catalog data:
friction, wear, bearings, contacts, lubrication, pressurised, pressure, film, roughness

Courseyear: 4
Semester: 4/0/0/0/0
Hours p/w: 4
Other hours: 0
Assessment: Written
Assessm.period(s): 1, 3
(see academic calendar)
Prerequisites: wb1220
Follow up: wb5400
Detailed description of topics:
Definition of Tribology and subdivision of the working field. The load carrying capacity of contacts between moving parts, with minimal friction and wear.
Dynamic contacts: roughness and real contact area, elastic and plastic deformation of micro contacts, index of plasticity, adhesive behaviour, elasticity, friction affected by plough and adhesive components, flits temperature, friction in rolling contacts, mechanism of wear.
Materials: metals, plastics, composites, surface treatment, systematic material selection.
Films: Self acting and pressurised films. Reynolds equation, wedge-effects, buffer-effect and stretch-effects. Non-dimensional presentation of characteristics like load carrying capacity, friction and flow. Design tools-charts. Classical problem with rigid surfaces. Stability. Stationary loaded and dynamically loaded films. Inverse theory. Models for thin foil and seals. Elasto hydrodynamic films. Gas en liquid films with pressure source.
Course material:
  • Dr.ir. A. van Beek, Thin film theory, Delft University Press, 1999
  • Dr.ir. A. van Beek, Dynamic contacts, Delft University Press, 1999
References from literature:
Elsevier, Tribology series, 33, 1997, ISBN 0.444.82366.2
Remarks (specific information about assessment, entry requirements, etc.):
Goals:
Design rules to optimize lifetime and performance, minimisation of friction, heat generation and wear.
Computer use:
for analytical or numerical solution of differential equations
Laboratory project(s):
Design content:
design optimisation
Percentage of design: 100%