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Aerospace Structures II

Aerospace Structures II

Code	15095
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 Applied Statics, Solid 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, manufacture and test a wingbox or similar strucutre 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); 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.
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.
Language	Portuguese. Tutorial support is available in English.