| Code |
18163
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| Year |
1
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| Semester |
S2
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| ECTS Credits |
6
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| Workload |
T(30H)/TP(30H)
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| Scientific area |
Engenharia Mecânica
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Entry requirements |
N.A.
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Learning outcomes |
Introduction and development of the fundamental concepts for design of lubrication systems.
1) Know the history and economic implications of the problems associated with tribology
2) Know the different types of lubricants and the way to improve their properties
3) Know how to characterize the state of surfaces and the different types of wear
4) Characterize the difference between the different types of lubrication and the form of implementation
5) Be able to use physical-mathematical models to model different lubrication regimes
6) Know the tribological effects on electrical systems
7) Be aware of the latest advances of tribology.
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Syllabus |
1. Introduction. Historical perspective. Nature of surfaces. Friction and wear. Lubrication Regimes: Hydrodynamics, Hydrostatic, Hydrodynamic, Mixed and Contact.
2. Geometry and texture of surfaces. Surface profile. Classic roughness parameters. Measurement devices.
3. Lubricants. Solid lubricants. Lubricating oils and pasta. Viscosity coefficient. Vegetable, mineral and synthetic oils. Normalization.
4. Lubrication Theory. Stokes equations. Petrov law for the coefficient of friction. Sommerfeld number. Adimensional film parameter. Applications.
5. Bearings. Description and classification. Friction, lubricating and rolling film. Selection and calculation of bearings. 6. Experimental Demonstration Works: Rugosimeter and Michel Patin.
7. Electrical effects in tribology 8. Nano-Tribology and Green Tribology.
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Main Bibliography |
1. Fundamentals of Engineering Tribology with Applications, 2016, Harish Hirani, Cambridge University Press.
2. Engineering Tribology, 2014, 4th Edition, Gwidon W. Stachowiak, Andrew W. Batchelor, Butterworth-Heinemann - Elsevier.
3. Tribology In Electrical Environments, 2006, H. Prashad, Elsevier Science
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Teaching Methodologies and Assessment Criteria |
UC develops in theoretical and theoretical-practical classes. In theoretical classes the different topics of the subject with film support are exposed. In theoretical-practical classes are presented exercises and examples of application and laboratory demonstrations are made.
The evaluation is performed through 1 test in 2 modules (T+TP), and also by elaborating an article on a tribology topic.
Test: 10Val.
5Val. (T) + 5Val. (TP)
On the TP module of the test, it is included one question related to laboratory demonstrations.
+ 10Val. for an individual Paper 10 pages (max), using ASME Journal of Tribology template. If the template is not rigorously respected, the
paper assessment will be negative (<5 Val.)
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Language |
Portuguese. Tutorial support is available in English.
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