Tribology

Scholar Year: 2019/2020 - 1S

Courses

Head Teacher Responsability Filipe José Didelet Pereira Head

Weekly workload Hours/week T TP P PL L TC EL OT TPL THE S Type of classes 2 2 Lectures Type Teacher Classes Hours Theorethical and Practical classes Totals 1 2,00 Filipe Didelet   3,00 Prática Laboratorial Totals 1 2,00

Teaching language

Portuguese

Intended learning outcomes (Knowledges, skills and competencies to be developed by the students)

To convey profound knowledge about tribological variables, lubricant properties, hydrodynamic lubrication and lubricant analysis.

Syllabus

1. General Concepts, Tribology, Lubrication and Wear
2. Understanding Friction
3. Physical Properties of Lubricants
3.1 Dynamic Viscosity
3.2 Kinematic Viscosity
3.3 Temperature-Viscosity Ratio
3.4 Viscosity index
3.5 Viscosity - Pressure Ratio
3.6 Viscosity Ratio - Cutting Voltage
3.7 Determination of Viscosity
3.8 Mixture Viscosity
3.9 Classifications for Viscosity in Oils
Classification S A E
Classification I S O
3.10 Temperatures Characteristics of Lubricants
Point of Fluidity and Precipitation
Flash Point and Combustion
Evaporation and Volatility
Stability and Oxidation
Thermal stability
Superficial tension
3.11Compatibility and Solubility of Additives
3.12 Compatibility with elastomers and filter materials
4. Hydrodynamic Lubrication
4.1 Reynolds equation
Bearing Parameters
Pressure Distribution
Load Capacities
Frictional force
Coefficient of friction
Flow
4.2 Flat bearings
Infinite Flat Bearings
Geometry
Pressure Distribution
Load Capacities
Frictional force
Coefficient of friction
Flow

4.3 Radial Bearings
Geometry
Pressure Distribution
Load Capacities
Frictional force
Coefficient of friction
Flow
5. Impurities and Contaminants of Lubricants
Water Content
Sulfur Content
Chlorine Content
Solubility of Gases in Oil

6. Filtering
7. Greases
8. Synthetic Lubricants
9. Fuels
9.1 Main fossil fuels
9.2 Fuels for internal combustion engines
9.3 Gasoline and diesel properties, applicable standards
9.4 Alternative fuels
10 Degradation and material failure due to wear

Demonstration of the syllabus coherence with the UC intended learning outcomes

Matters explained referring concrete cases, being complemented by exercises of application.
Observation of concrete situations from elements supplied by producing or recycling companies.
Application of the concepts acquired in case studies.

Teaching methodologies

Assessment Type Distribution assessment without final exam Assessment Components

Assessment methodologies and evidences

1 test
OR
FINAL EXAM
THE NOTE OF THE TEST OR FINAL EXAM SHOULD BE UPPER 9.5 VALUES
THE WORKING NOTE SHALL BE UP TO 9.5 VALUES

Attendance system

Methodology and evaluation tests
NF = 0.5xTrab + 0.5x Test Score
Comments
2016/2017: FUNCTIONING IN TUTORIAL REGIME