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The design of repairable advanced composite structuresThis paper addresses the repair of advanced composite structures by mechanical fasteners or by adhesive bonding. It is shown that many of today's composite designs are unreasonably difficult to repair. Conversely, the knowledge to design repairable structures is already available, if only it is applied during the initial design stage. Bolted or riveted repairs require only the avoidance of extremely orthotropic composite fiber patterns; those near the quasi-isotropic layup are the most suitable. Mildly orthotropic fiber patterns are appropriate for structures in which there is a dominant load direction. Thick composite structures are shown to require bolted or riveted repairs while thin structures favor adhesively bonded permanent repairs, although provisions can be easily made for temporary mechanical repairs. The reasons why integrally stiffened cocured composite designs are usually impractical to repair are explained and alternative repairable design concepts are presented.
Document ID
19860053597
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hart-Smith, L. J.
(Douglas Aircraft Co. Long Beach, CA, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1985
Subject Category
Structural Mechanics
Report/Patent Number
SAE PAPER 851830
Accession Number
86A38335
Funding Number(s)
CONTRACT_GRANT: NAS1-11234
CONTRACT_GRANT: F33615-80-C-5092
CONTRACT_GRANT: NAS1-13172
CONTRACT_GRANT: NAS1-16857
CONTRACT_GRANT: F33615-79-C-3212
Distribution Limits
Public
Copyright
Other

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