Machine Elements
Keywords |
Classification |
Keyword |
OFICIAL |
Applied Mechanics |
OFICIAL |
Applied Mechanics |
Instance: 2010/2011 - 1S
Cycles of Study/Courses
Acronym |
No. of Students |
Study Plan |
Curricular Years |
Credits UCN |
Credits ECTS |
Contact hours |
Total Time |
MIEM |
185 |
Syllabus since 2006/2007 |
4 |
- |
6 |
56 |
160 |
Teaching language
Portuguese
Objectives
This course aims to give students an insight into machine design, through the analysis of dimensioning problems and through some machine elements frequently used. Students are expected to know the content and apply skills from other courses (Solid Mechanics, Structural Mechanics, Materials…) and complement them with themes taught in this course.
Program
1 - Gears:
1.1 - Classification; criteria based upon axles and teeth; the case of parallel axes: spur and helical gears.
1.2 - The MAAG system for cutting gears; basic rack profile; involute.
1.3 - Metrology: base tangent length Wk; measurement over balls on external gears.
1.4 - Mating gears; contact ratio.
1.5 - Addendum modification; sliding; interference; imposed center distance.
2 - Fatigue design:
2.1 - Uniaxial and biaxial loading.
2.2 - Mean stress; Goodman and Soderberg.
2.3 - Stress concentration. The improvement of fatigue behaviour. The effect of residual stress fields.
3 - Tribology:
3.1 - Friction and wear.
3.2 - Lubrication laws; Reynolds equation.
3.3 - Lubricants' properties.
3.4 - Introduction to hydrodynamic and hydrostatic lubrication.
3.6 - Dry bearings.
3.7 - Introduction to the lubrication of mechanical drives: Cheng's theory.
4 - Structural connections:
4.1 - Mechanical fastening.
4.2 - Welded connections.
Mandatory literature
Henriot, Georges;
Engrenages. ISBN: 2-10-003903-2
MAAG Gear Company, Ltd.;
MAAG gear book
Ferreira, Luís Andrade;
Tribologia. ISBN: 972-95794-5-8
Bernard J. Hamrock; Fundamentals of Fluid Film Lubrication, McGraw-Hill, 1994. ISBN: 0 07 025956 9
Branco, Carlos Augusto Gomes de Moura;
Fadiga de estruturas soldadas. ISBN: 972-31-0139-4
Complementary Bibliography
Branco, C. M., Ferreira, J. M., Costa, J. D., Ribeiro, A. S.; Projecto de Órgãos de Máquinas, Fundação Calouste Gulbenkian
Teaching methods and learning activities
Theoretical classes (2 hours per week)
Theoretical-practical classes (2 hours per week)
Invited experts will be giving presentations
keywords
Technological sciences > Engineering > Mechanical engineering
Evaluation Type
Evaluation with final exam
Assessment Components
Description |
Type |
Time (hours) |
Weight (%) |
End date |
Attendance (estimated) |
Participação presencial |
56,00 |
|
|
Examination |
Exame |
2,00 |
|
|
|
Total: |
- |
0,00 |
|
Amount of time allocated to each course unit
Description |
Type |
Time (hours) |
End date |
Study |
Estudo autónomo |
104 |
|
|
Total: |
104,00 |
|
Eligibility for exams
According to General Evaluation Rules of FEUP
Calculation formula of final grade
According to General Evaluation Rules of FEUP
Examinations or Special Assignments
Not applicable
Special assessment (TE, DA, ...)
According to General Evaluation Rules of FEUP
Classification improvement
According to General Evaluation Rules of FEUP