Reinforced stiffeners and method for making the same

A composite stiffener (20) is fabricated using preforms (22, 24, 26, 28) of laminated, unidirectional composite tape. The stif fener includes a void (37) that is reinforced by a filler (36) wrapped with a structural adhesive (46). The surfaces of the preforms surrounding the void include a layer of...

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Bibliographische Detailangaben
Hauptverfasser:	LEE KARL B, MORRIS JOHN D, HARRIS CHRISTOPHER G, DEOBALD LYLE R, IDEN MARK C, MARCOE JEFFREY L
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AEROPLANES AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING AIRCRAFT AVIATION COSMONAUTICS HELICOPTERS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A composite stiffener (20) is fabricated using preforms (22, 24, 26, 28) of laminated, unidirectional composite tape. The stif fener includes a void (37) that is reinforced by a filler (36) wrapped with a structural adhesive (46). The surfaces of the preforms surrounding the void include a layer of composite fabric (48) which is bonded to the filler by the adhesive, thereby increasing the toughness of stiffeners around the void and improving pull-off strength of the stiffener.