Attachment fitting for composite material structures
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United States of America Patent
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Apr 30, 2002
Grant Date -
N/A
app pub date -
Aug 19, 1999
filing date -
Aug 19, 1998
priority date (Note) -
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Abstract
A load bearing attachment fitting for a composite material structure. The fitting includes an elongate body having a plurality of undulations formed along its longitudinal sides. The undulations engage the fibers in the fiber-resin matrix so as to transmit loads from the fitting into the body of the structure. To form the connection between the fitting and the composite material structure, longitudinal strips of fiber-resin tape are laid over the fitting and an adjacent form which defines the body of the structure. Crosswise fibers are then wound over the longitudinal tape to force and hold the longitudinal fibers in conformity with the undulations along the fitting, so that the longitudinal fibers transmit loads from the fitting into the composite material structure. A fluidizable form may be used to form the body of the structure, and after curing the forms may be removed by washing this out through a threaded bore in the attachment fitting. The threaded bore then provides a mounting point for attaching the assembly to other structures in load bearing engagement.
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