Mechanics of Aircraft Materials
Dr Ly Hung Anh
Case Study
Department of Aerospace Engineering – Faculty of Transportation Engineering
Trang 3Airbus training document
Trang 4Three advantages of composite material : 1 Light weight
2 Corrosion resistance
3 A large impact on strength
Composites in the Aircraft Industry:
http://www.appropedia.org/Composites_in_the_Aircraft_Industry
Trang 5The weight of aircraft components made of composite materials are reduced by approximately 20%
(Composites in the Aircraft Industry:
http://www.appropedia.org/Composites_in_the_Aircraft_Industry)
Trang 6Composite materials :
1 Core materials: Polystyrene, polyurethane (urethane) or polyvinyl chloride (PVC)
2 Reinforcement materials: fiberglass, Kevlar, and carbon fiber (graphite).
3 Resins: Vinyl Ester, Epoxy.
Basics of Composite Construction:
http://www.exp-aircraft.com/library/alexande/composit.html
Trang 9Aluminium alloy versus Steel :
1 Aluminium alloys typically have an elastic modulus of about 70 GPa, which is about one-third of the elastic modulus of most kinds of steel and steel alloys Therefore, for a given load, a component or unit made of an aluminium alloy will experience a greater elastic deformation than a steel part of the identical size and shape.
2 In general, stiffer and lighter designs can be achieved with aluminium alloys than is feasible with steels.
3 An important structural limitation of aluminium alloys is their lower fatigue strength compared to steel.
Aluminium alloy : The most important cast aluminium alloy system is Al-Si,where the high levels of silicon (4.0% to 13%) contribute to give good castingcharacteristics Aluminium alloys are widely used in engineering structuresand components where light weight or corrosion resistance is required.
Trang 12http://www.technovelgy.com/ct/Science-Fiction-News.asp?NewsNum=2493
Trang 13Composite in Boeing 787
http://www.1001crash.com/index-page-composite-lg-2.html