High strength, high stiffness, curved composite member
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United States of America Patent
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Dec 3, 1996
Issued Date -
N/A
app pub date -
Aug 18, 1995
filing date -
Jul 14, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a tubular composite member which has a plurality of plies and a generally elongate and selectively curved axis. The plies can include helically oriented fiber components, a matrix material, and thermoplastic tubes. An intermediate layer preferably has two tri-axially braided plies arranged at selective angles relative to the member's axis and as a function of the curvature of the member. Interior and exterior plies of circumferential windings can be part of the member such that the intermediate ply is contiguous and between the interior and exterior ply. In one practice, the member can be formed into a selective shape and then cured. Alternatively, the member is formed between a thermoplastic core and a thermoplastic sheath to facilitate a secondary process of heating and bending the member into a selective axially-curved shape.
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