Commercial Aircraft Composite Technology by Ulf Paul Breuer

By Ulf Paul Breuer

This ebook relies on lectures held on the college of mechanical engineering on the Technical collage of Kaiserslautern. the focal point is at the crucial subject matter of societies total airplane standards to precise fabric standards and highlights an important merits and demanding situations of carbon fiber strengthened plastics (CFRP) in comparison to traditional fabrics. because it is prime to choose the best fabric on the correct position early at the major actions and milestones of the advance and certification technique and the systematic of defining transparent requisites are mentioned. the method of fabric qualification - verifying fabric necessities is defined intimately. All cutting-edge composite production applied sciences are defined, together with alterations and complemented via examples, and their development strength for destiny purposes is mentioned. Tangible case reviews of excessive carry and wing constructions emphasize the explicit merits and demanding situations of composite expertise. ultimately, most up-to-date R&D effects are mentioned, delivering attainable destiny strategies for key demanding situations corresponding to cost effective excessive functionality fabrics, electric functionality integration and morphing structures.

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However, other important parts, relevant for aircraft control and flight safety, had already been introduced by Airbus in 1982 for the A310-200, Fig. 19. Spoiler, rudder and elevators were composite structures. For A320 (1987), not only spoiler, rudder, elevator and fin were composite, but also main Fig. 17 Wright Patterson trainer aircraft “Vultee BT 15” with GFRP wings [12] 18 1 Introduction Fig. 3 m) Spoiler Rudder Elevator Fin MLG & NLG Doors Wing Shroud Box Wing T/E panels Flap Track Fairings Pylon Fairings Nacelle Cowlings Floor Panels Aileron Flaps Horizontal Stabilizer Spoiler Rudder Elevator Fin MLG & NLG Doors Wing Shroud Box Wing T/E panels Flap Track Fairings Pylon Fairings Nacelle Cowlings Floor Panels Aileron Flaps Horizontal Stabilizer Rear Pressure Bulkhead Keel Beam Fig.

Damage Tolerance Requirements: The “No Crack Growth” Concept of CFRP The applicable rules for relevant load cases, safety factors etc. defined by the authorities can only reflect the latest best available technology (“state of the art”). , it is necessary to assess any kind of certification risk already before the “authorisation to offer” and to discuss possible mitigation technologies with the authorities. It is also necessary to agree with the authorities on special analysis and tests to be carried to demonstrate that all risks have been properly assessed and can be mitigated by adequate design solutions or additional precautions.

It is therefore very important to freeze the material decision for components well before a new aircraft is offered to the market. This chapter starts with a discussion of the development process of new aircraft and the definition of the basic milestones. Fundamental aircraft requirements of operators, authorities and airframe manufacturers influencing the material decision are highlighted, and the requirement cascade is introduced. The functional analysis method as part of the design process is explained followed by the description of the general procedure of the structure stressing and certification process.

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