Abstract: Aircraft fuselage made out with composite material and manufacturing processes. The structure of the fuselage (11) comprises a skin (13), a plurality of frames (17) positioned transversely to the longitudinal axis (9) of the fuselage (11) and a plurality of longitudinal stiffening elements (14, 15) that can be either stringers (14) or beams (15), being the ratio between the distance (X) between frames (17) and the distance (Y) between longitudinal stiffening elements (14, 15) is less than one. If the stiffening elements are stringers (14) the manufacturing process is based on assembling the fuselage section (11) joining the skin (13) with the stringers (14) to the frames (17). If the stiffening elements are beams (15) the manufacturing process is based on joining the skin to an internal structure made up with frames (17) and beams (15).

Abstract: Reinforcement structure (1) for an opening (10) in the primary structure of an aircraft, said structure comprising a skin (2), frame members (3) which are transverse with respect to the flying direction of the aircraft, and stringers (4) which are longitudinal with respect to the flying direction of the aircraft, said reinforcing structure (1) comprising: a perimetral reinforcing element (5) situated along the edge of the opening (10) and reproducing the geometrical form thereof; at least one pair of transverse reinforcing elements (6) arranged on both transverse sides of the opening (10); at least one pair of longitudinal reinforcing elements (7) arranged on both longitudinal sides of the opening (10).

Abstract: Internal structure for aircraft comprising a skin (1) of composite material, some stringers (2) of composite material integrated into the interior of the aforementioned skin (1) and some frames (3) of composite material, comprising the skin (1) with some zones (4) in which its thickness (20) is greater than the thickness (10) this skin (1) has in the rest of its section, with the stringers (2) integrated into these zones (4) of the skin (1), achieving with this arrangement the isolation of the interface line (5) of the stringer (2) joint with the skin (1) from the skin (1) with thickness (10).

Abstract: Aircraft fuselage frame in composite material with stabilising ribs which, in at least a first sector (31), comprises a frame (9) with an omega-shaped cross-section (11) formed by a top element (23), two webs (25, 25?), two feet (27, 27?) which includes at least one internal rib (41) formed by a top element (43) joined to the top element (23) of the frame (9), a web (45), two flanges (49, 49?) joined to the webs (25, 25?) of the frame (9) and a foot (47) aligned with the feet (27, 27?) of the frame (9). The invention also relates to a manufacturing procedure for the first sector (31) of the frame with stabilised web (10) comprising steps for: a) providing a frame (9) and at least one internal rib (41) with the configurations indicated; b) joining at least said internal rib (41) to the frame (9).

Abstract: The present invention relates to a curved rear pressure bulkhead (1) made of a composite material, comprising three layers: an outer layer (2) and an inner layer (3) symmetrical with one another, which are made of a fiber laminate, and the intermediate layer or core (4) made of a lightweight material. With such a sandwich-type shape, the resulting bulkhead (1) is able to withstand the bending loads coming from the strain. and pressurization of the fuselage without having to increase its stiffness by means of using some type of stiffener. The bulkhead (1) comprises a ring (6) that is attached to the ends of the sandwich. shape. This ring (6) is split into several parts (8) to facilitate the assembly of the bulkhead (1) made of composite material to the fuselage skin (5).

Abstract: The invention relates to an integrated multispar torsion box structure of composite material for aircraft, comprising a lower skin (12), an upper skin (11), several spars (9), each of which comprises in turn a chord (13) and a web (14), several stringers (10) in the lower skin (12) and several stringers (10) in the upper skin (11), characterized in that the mentioned integrated torsion box structure is achieved by means of joining unitary U-shaped structural elements (15), unitary U-shaped structural elements (16) with a flap and unitary C-shaped structural elements (17) with a flap. The invention also relates to a method for manufacturing an integrated multispar torsion box structure of composite material for aircraft.

Abstract: Load introduction zone in the rear end of an aircraft comprising receiving elements (3, 4) of the loads of the horizontal and vertical tail stabilizers connected to structural elements (2, 8, 9) wherein: a) said structural elements are the cladding (8), two contiguous load-bearing frames (2) with a ? or omega cross-section and, at least, a third frame (9); b) the receiving element of the horizontal tail stabilizer load is a first fitting (3) structured as a torque box, transversely arranged between said load-bearing frames (2) and connected to them, and the receiving elements of the vertical tail stabilizer loads are some second fittings (4) coupled to these frames (2, 9); c) said frames (2, 9) and said first and second fittings (3, 4) are entirely made of composite material.

Abstract: The invention relates to an integrated structure of a composite material multispar torsion box (1) for aircraft, comprising a lower skin (12), an upper skin (11), several spars (9) defining cells (14), the first cell (19) being the closest to the input of load in the box (1), said structure comprising unit elements in the first cell, which unit elements provide the torsion box (1) with the necessary torsional rigidity to prevent the deformations occurring as a result of local loads.

Abstract: The invention relates to an integrated multispar torsion box structure of composite material for aircraft, comprising a lower skin (12), an upper skin (11), several spars (9), each of which comprises in turn a chord (13) and a web (14), several stringers (10) in the lower skin (12) and several stringers (10) in the upper skin (11), characterized in that the mentioned integrated torsion box structure is achieved by means of joining unitary U-shaped structural elements (15), unitary U-shaped structural elements (16) with a flap and unitary C-shaped structural elements (17) with a flap. The invention also relates to a method for manufacturing an integrated multispar torsion box structure of composite material for aircraft.

Abstract: The present invention relates to a curved rear pressure bulkhead (1) made of a composite material, comprising three layers: an outer layer (2) and an inner layer (3) symmetrical with one another, which are made of a fiber laminate, and the intermediate layer or core (4) made of a lightweight material. With such a sandwich-type shape, the resulting bulkhead (1) is able to withstand the bending loads coming from the strain and pressurization of the fuselage without having to increase its stiffness by means of using some type of stiffener. The bulkhead (1) comprises a ring (6) that is attached to the ends of the sandwich shape. This ring (6) is split into several parts (8) to facilitate the assembly of the bulkhead (1) made of composite material to the fuselage skin (5).