| Code |
15095
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| Year |
3
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| Semester |
S2
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| ECTS Credits |
6
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| Workload |
PL(15H)/TP(45H)
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| Scientific area |
Aeronautics and Astronautics
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Entry requirements |
It is important to have been approved in Applied Statics, Solid Mechanics and Aerospace Structures I.
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Mode of delivery |
Presencial
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Work placements |
Not Apllicable
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Learning outcomes |
At the end of this curricular unit, students should acquire additional skills to those obtained in Aerospace Structures I, which will enable them to undertake a more detailed analysis of stresses and deformations in aerospace structures and components by using appropriate analytical and computational tools. The students should also be able to identify non-permanent critical loadings and to develop a structural aeronautical component.
At the end of the semester the student should:
- know how to analyse and size aerospace structures made of laminated composites;
- know how to apply the finite element method in different situations to calculate stresses in aeronautical components under different loads;
- understand the fatigue mechanisms and be able to predict damage in a component;
- understand aeroelastic phenomena in lifting surfaces and their impact on the design of the structure;
- know how to design, manufacture and test a wingbox or similar strucutre made in laminated composites.
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Syllabus |
1. Composite structures: characteristics and properties of aerospace composite materials; stress-strain analysis for an orthotropic laminate; types of failure; stresses in laminated aircraft components (wings and fuselages); manufacturing & testing of laminated composite structures
2. Computational methods for structural analysis: matrix methods (bars, beams, 2D and 3D trusses); introduction to the finite element method (beam, triangular and quadrilateral elements); examples and practical problems (static analysis); commercial FEM programs.
3. Introduction to Fracture Mechanics: ruin mechanisms and their importance to the design of aircraft structures; energy associated with fracture; crack propagation due to fatigue and creep; definition of stress intensity factor; environmental factors.
4. Topics on elementary aeroelasticity: fluid-structure interaction; definition of divergence, flutter and control reversal; critical speeds; techniques for active control of aeroelastic phenomena.
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Main Bibliography |
1. Gamboa, P.V., Notes of the curricular unit - Estruturas Aeroespaciais II, ~400 slides, UBI, 2024.
2. Megson, T., “Aircraft Structures for Engineering Students”, 6th edition; Butterworth-Heinemann; 2017.
3. Donaldson, B.K., “Analysis of Aircraft Structures: An Introduction”; McGraw-Hill; 1993.
4. Peery, D., “Aircraft Structures”, 2nd edition, McGraw-Hill; 1982.
5. Sun, C.T., “Mechanics of Aircraft Structures”; Wiley-Interscience; 1998.
6. Dowling, N.E.; “Mechanical Behavior of Materials: Engineering Methods for Deformation, Fracture and Fatigue – 2nd Edition”; Prentice Hall; New Jersey, USA; 1999.
7. Suresh, S., “Fatigue of Materials – 2nd Edition”; Cambridge University Press; Cambridge, U.K.; 1998.
8. Baker, A., Stuart, D., Kelly, D. (Editors); “Composite Materials for Aircraft Structures – 2nd Edition”; AIAA Education Series; 2004.
9. Moura Branco, C.A.G., “Mecânica dos Materiais”, 3ª edição, Fundação Calouste Gulbenkian; 1998.
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Teaching Methodologies and Assessment Criteria |
This curricular unit is developed within an essentially theoretical-practical structure. The content is delivered orally with the support of multimedia slide projections, supplementary information written on the board, and through solving a large number of exercises. Additionally, there is a practical project component where the acquired knowledge is applied. There is also a laboratory practice component to manufacture and test the structural component developed in the project.
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Language |
Portuguese. Tutorial support is available in English.
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