Abstract
A postbuckled carbon fibre structure requires special design considerations to avoid delamination failures. A practical design for a postbuckled wing box is presented. The design features incorporated have been proven in the author’s testing programme. This is leading to the testing of a full-scale wing box for an aerobatic light aircraft. Various means of improving the strength of skin/stiffener junctions are described, including the use of Kevlar stitching at this critical area.
A co-curing technique is used to form all the joints made directly to the skin surfaces. Tooling suitable for low volume production has been developed to form these joints. Final assembly of the structure is by adhesive bonding. Different configurations of joint are evaluated. A type of slotted joint is developed which uses features incorporated into the co-cured mouldings. This type ofjoint allows the structure to be assembled without the use of expensive clamping jigs.
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References
Brooks, W. G., The design and construction of a post buckled carbon fibre wing box structure, ICAS Conference Proceedings, College of Aeronautics, Cranfield Institute of Technology.
Belgrano, G., The design, manufacture and testing of stiffened aircraft compression panels using advanced materials, M.Sc. structural design thesis, Cranfield Institute of Technology, 1984.
Anderson, M. et al., PASCO panel analysis and sizing code, capability and analytical foundations, NACA Technical Memorandum 30181, January 1980.
Copes, R. and Pipes, R., Design of the spar to wingskin joint, Centre for Composite Materials, University of Delaware; Lenoe et al., Fibrous Composites in Structural Design, New York, Plenum Press, 1978.
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© 1987 Elsevier Applied Science Publishers Ltd
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Brooks, W.G. (1987). The Construction of a Postbuckled Carbon Fibre Wing Box. In: Marshall, I.H. (eds) Composite Structures 4. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3455-9_13
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DOI: https://doi.org/10.1007/978-94-009-3455-9_13
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8047-7
Online ISBN: 978-94-009-3455-9
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