BRACING BEAM, METHOD AND MULTILAYER ARTICLE FROM FIBROUS MATERIAL FOR PRODUCTION OF SAID BEAM Russian patent published in 2011 - IPC B64C1/10 B29C70/22 

FIELD: transport.

SUBSTANCE: invention relates to bracing beam and method of its production. Curved bracing beam, particularly, curved segment of aircraft fuselage compartment frame with outer section subjected to expanding and/or contracting forces and base section subjected to shearing and/or crosswise forces, comprises synthetic material reinforced by multilayer article from fibrous material with basic and peripheral zones. Multilayer article comprises layer propagating on over entire area of multiplayer article surface and has first direction of fibers and full-size layer propagating on over entire area of multiplayer article surface and has second direction of fibers. Additional layer with third direction of fibers is arranged in beam outer section, on multilayer article periphery. Basic zone of said article with layers with first and second directions of fibers allows smooth folding. Basic zone and peripheral zone of multilayer article are arranged at 90° to form bracing beam with L-like cross section. Beam basis section has layers with only first or second direction of fibers.

EFFECT: reduced weight and higher strength.

12 cl, 20 dwg