FIELD: textiles, paper.
SUBSTANCE: group of inventions discloses a three-dimensional woven preform, a fibre-reinforced composite material comprising this preform, and a method of their manufacturing. The woven preform comprises one or more layers of fabric with the warp located in a predetermined direction. A part of the fabric with the warp located in the predetermined direction is pushed into the mould to form a protrusion. The preform comprises a protrusion and a connecting protrusion on the housing. The housing and the vertical protrusion are integrally woven, thus forming a continuous fibre across the whole preform. One part of the fabric with the warp located in the predetermined direction comprises stretchable carbon fibres in the warp direction and the other comprises conventional carbon fibres. The fabric with the warp located in the predetermined direction may be woven on a weaving loom provided with a differential tension mechanism. The fabric with the warp located in the predetermined direction may be a single- or a multilayer fabric. The preform or the composite material may be a part of the aircraft port-hole frame.
EFFECT: forming the three dimensional preform having a reduced weight and/or improved operational characteristics as well as complete weaving of different parts of the structure.
40 cl, 6 dwg
