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Aerospace Structures II

Code 10373
Year 3
Semester S2
ECTS Credits 6
Workload PL(15H)/TP(45H)
Scientific area Aeronautics and Astronautics
Entry requirements It is important to have been approved in Solid Mechanics, Applied Mechanics and Aerospace Structures I.
Mode of delivery Presencial
Work placements Not Apllicable
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 a wing box made in laminated composites.
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).
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.
Main Bibliography 1. Gamboa. P.V., Apontamentos da unidade curricular - Estruturas Aeroespaciais II, ~390 acetatos, UBI, 2022.
2. T. Megson; “Aircraft Structures for Engineering Students”; 6th Edition; Butterworth-Heinemann; 2017.
3. Bruce K. Donaldson; “Analysis of Aircraft Structures: An Introduction”; McGraw-Hill; 1993.
4. David Peery; “Aircraft Structures, (2nd ed.)”; 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. Carlos A. G. Moura Branco; Mecânica dos Materiais (3ª ed.); Fund. Calouste Gulbenkian; 1998.
Teaching Methodologies and Assessment Criteria This course is structured in a mix of theoretical and practical topics. The material is transmitted orally with multimedia slideshow support, with additional information written on the board and with a large number example problems solved on the blackboard.
Language Portuguese. Tutorial support is available in English.
Last updated on: 2022-03-02

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