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Aeronautical Structures
Scholar Year: 2020/2021 - 2S
| Code: |
EM22222 |
|
Acronym: |
EA |
| Scientific Fields: |
Mecânica dos Meios Sólidos |
Courses
| Acronym |
N. of students |
Study plan |
Curricular year |
ECTS |
Contact time |
Total Time |
| EM |
17 |
|
2º |
6,0 |
75 |
162,0 |
Teaching language
Portuguese
Intended learning outcomes (Knowledges, skills and competencies to be developed by the students)
Study the stress and strain states at a point.
Know energy theorems and how to apply them to the calculation of external connections and deformations of structures.
Know the phenomenon of structural instability. Calculate the critical load of columns and thin plates.
Know the various structural components of an aircraft and the imposed loads.
Calculate tensions and deformations in thin-walled beams.
Apply the acquired knowledge to the analysis of structural components of aircraft.
At the end of the course the student should:
- be able to identify the main structural elements of an aircraft;
- to understand the theoretical foundations necessary for the definition of the general equilibrium equations, identifying their different terms;
- to be able to calculate tensions and deformations in aeronautical components subject to different modes of loading, through the use of analytical techniques.
Syllabus
1 - Stress and strain
2 - Energy methods
3 - Classical theory of plates
4 - Structural instability: Columns and thin plates
5 - Structural components of an aircraft and imposed loads
6 - Thin-walled beams: bending, shear and torsion
7 - Stress analysis of aircraft components
Demonstration of the syllabus coherence with the UC intended learning outcomes
1 - Stress and strain
Study the stress and strain states at a point. Know the transformation of plane stress and plane strain (coordinates transformation). Represents the Mohr´s circle for plane stress and plane strain. Evaluate the principal stresses, principal strains, principal directions, maximum shear stress and maximum shear strain.
2 - Energy methods
Know the principal energy theorems and apply them to the calculation of the reaction forces and deformations of statically determinate and statically indeterminate structures.
3 - Classic plate theory
Analyze and calculate the stresses and deformations in thin plates using energetic methods (Rayleigh-Ritz).
4 - Structural instability: Columns and thin plate. Evaluate the critical load of columns and thin plates, with different support conditions.
5 - Structural components of an aircraft and imposed loads
Know the main structural components of an aircraft, as well as the imposed loads.
6 - Thin-walled beams: bending, shear and torsion
Analyze and calculate the stresses and deformations in thin wall, open section and closed section beams. Use structural idealization models.
7 - Stress analysis of aircraft components
Apply the acquired knowledge to the analysis of structural components of aircraft.
Teaching methodologies
Theoretical-Practical classes: Theoretical exposure of the subjects followed by problems solving;
Practical-laboratory classes: Realization of practical works using experimental analysis; Problems solving.
Demonstration of the teaching methodologies coherence with the curricular unit's intended learning outcomes
The Theoretical-Practical classes are composed by an expositive part, where the fundamental concepts of the different subjects are presented, followed by problems solving. The students are stimulated to participate in the resolution of the problems.
In the Practical-Laboratory classes the students in group, perform under the teacher supervision, practical work with specific guidelines and final report presentation, or solve exercises to consolidate the subjects taught.
Assessment methodologies and evidences
Distributed assessment without final exam:
a) Written component
Performance 1 test (Te), 1 problems sheet (Fp) and 1 monograph (Mo)
b) Laboratory component
Carrying out 4 practical works (L1, L2, L3 and L4)
The final grade (NF) is given by:
NF = 0,5*Te + 0,15*Fp + 0,2*(L1+L2+L3+L4)/4 + 0,15*Mo
Conditions for approval in the course:
NF >= 9,5 values and Te >= 8 values;
If Te < 8 values => NF = Te.
At the normal assessment period and at the appeal assessment period, the students can recover the test.
Comments:
Test focuses on chapters 1, 2, 3 and 4 of the course program.
Problems sheet focuses on chapters 5, 6 and 7 of the course program.
Practical works, problems sheet and monograph are carried out in groups (2 students).
Assement and Attendance registers
| Description |
Type |
Time (hours) |
End Date |
| Attendance (estimated) |
Classes |
70,5 |
|
|
Work |
6 |
|
|
Work |
6 |
|
|
Work |
6 |
|
|
Work |
16 |
|
|
Exercise |
15 |
|
|
Study |
35 |
|
| |
Total: |
154,5 |
Primary Bibliography
T.H.G. Megson;Aircraft Structures for engineering students, Butterworth-Heinemann, 2007. ISBN: 978-0-75066-7395 |
F.P. Beer, E.R. Johnston, J.T. DeWolf;Resistência dos Materiais, McGraw-Hill, 2006. ISBN: 85-86804-83-5 |
D.J. Peery, J.J. Azar;Aircraft Structures, McGraw-Hill Book Company, 1982. ISBN: 0-07-049196-8 |
Secondary Bibliography
A. Valido;Aeronautical Structures (folhas da UC), 2020 |
A. Valido, J. Duarte Silva;Introdução à Extensometria Eléctrica de Resistência (folhas), 1997 |
Observations
Dates of assessment tests
Te - 2020-05-07
L1 - 2020-03-17
L2 - 2020-04-21
L3 - 2020-05-12
L4 - 2020-06-16
Mo - de 2020-04-30 a 2020-06-08
Fp - de 2020-05-18 a 2020-06-25
The test is done without consultation, and a form is distributed.
Plagiarism of any evaluation component (test or lab work) will be reported superior for disciplinary action.
Reports of practical work are delivered in the PL class immediately following their completion.
Justification of the ECTS:
Registered Assessment Components and Occupation = 162 h
Average value = 162/27 => 6 ECTS
Note: 1 ECTS corresponds to 27 hours of work
Attendance hours:
Aníbal Valido: Tuesday: from 3:00 p.m. to 4:30 p.m. ; Thursday from 3:00 p.m. to 4:30 p.m.
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