Method for stiffening plates intended for the creation of ship walls and comprising laminated composite materials, and resulting plate

Method for stiffening plates (1) intended for the creation of ship walls and comprising laminated composite materials, the laminated composite materials being constituted of stacks of layers of fibres impregnated with resin,

• wherein,
• at least one elongate profile member (3a, 3b, 3c) made of laminated composite material is pre-manufactured having a transverse cross-section of a predetermined shape over the length thereof, with the pre-manufactured profile member (3a, 3b, 3c) and obtained being rigid due to the polymerization of the resin that impregnated the layers of fibres that the profile member comprises, and,
• and wherein a panel (2) is used having two main surfaces and comprising at least on the surface of at least one of its two main surfaces a laminated composite material, with the resin that impregnated the layers of fibres that the panel comprises being polymerized, and
• said at least one pre-manufactured profile member (3a, 3b, 3c) is assembled and attached together onto one of the main surfaces of said panel (2), with the main surface of the panel receiving the profile member comprising laminated composite material, and
• wherein the pre-manufactured profile member (3a, 3b, 3c) has a transverse cross-section of a determined shape that comprises three continuous portions:
• two flanges (7, 7′) and a web (6), the two flanges (7, 7′) and the web (6) being substantially straight in the transverse cross-section of the profile member, the two flanges (7, 7′) being connected together by the web, the web (6) being connected to the flanges (7, 7′) along its two opposite lateral edges, and
• wherein the two flanges (7, 7′) and the web (6) are longitudinally extended over three separate planes, with the plane over which extends the web (6) crossing the two separate planes over which extend the flanges (7, 7′), with the two planes over which extend the two flanges (7, 7′) being parallel to each other and crossing the plane over which the web (6) extends with an angle of about 90°, each flange (7, 7′) having two main surfaces, a main inner surface on the side of the web (6) and a main outer free surface opposite the preceding one, one of the two flanges (7, 7′) of the pre-manufactured profile member being applied by its main outer free surface on the panel.