Abstract: A method for manufacturing an aerospace and/or aeronautical composite tubular part, the composite tubular part includes a tubular body and at least one flange. The method includes the following steps: providing at least one composite tubular body portion; forming at least one flange component from a second thermosetting material; a first heat treatment to partially polymerize the flange component or components; assembling the flange component or components on the composite tubular body; a second heat treatment of the composite assembly so as to polymerize both the at least one tubular body portion and the flange component or components. A composite tubular part is also provided.

Abstract: Structure intended to stiffen a component made of thermosetting composite material by being fitted to at least one of its surfaces, including: at least one longitudinal body, with first and second longitudinal edge faces on opposite sides, and first and second lateral faces on opposite sides; at least one base including at least one mounting base, each base having a plate and first and second tongues which delimit, with the plate, a housing for at least one body, the first and second tongues extending from a main face of the plate and being pressed respectively against the first and second lateral faces of the body. Each mounting base has a plate which is secured to the first longitudinal edge face of a body and which is intended to be pressed against the surface of the component to be stiffened. Each body and each base are made of thermosetting composite material.

Abstract: A stiffened part formed from at least two members of thermoset composite material including at least one body of a first structure and optionally a second structure. A manufacturing method includes: forming a fibre preform and impregnating each body of the first structure with thermosetting resin or forming a pre-impregnated fibre preform to obtain a body formed from uncured thermosetting composite material supported by a mandrel; optionally partially or fully polymerising at least one body supported by a mandrel; optionally, providing the second structure formed from uncured, partially uncured or fully uncured thermosetting composite material; optionally, depositing a layer of uncured thermosetting adhesive on an area where a fully cured member makes contact with another member of the part; joining the members, each member being juxtaposed with; or stacked upon, at least one other member; fully curing the assembly by heat treatment; removing the mandrel from each fully cured body.

Abstract: A method for assembling two parts, referred to as first and second parts, the first part being produced from composite material with fibrous reinforcement embedded in a thermosetting or thermoplastic matrix, the method comprising the steps of: obtaining the first part comprising, on all or part of an outer surface, a first amorphous thermoplastic film; positioning the first part and the second part such that the first amorphous thermoplastic film is placed opposite the second part; introducing a thermosetting resin between the first amorphous thermoplastic film and the second part; at least partially polymerising the thermosetting resin. When the two parts comprise an amorphous thermoplastic film, the parts are positioned such that the respective amorphous thermoplastic films are placed opposite each other, and the thermosetting resin is introduced between the amorphous thermoplastic films.

Abstract: A partially polymerised thermohardenable connection part and to methods for producing and assembling such a connection part. The connection part for connecting two mechanical parts is thermohardenable and is partially polymerised in such a way as to be rigid at room temperature and able to be subjected to a subsequent polymerisation, the connection part being thus both sufficiently rigid to be able to be manipulated and brought into contact with at least one of the two mechanical parts which it is to interconnect and able to be subjected to a subsequent additional polymerisation in order to achieve its final polymerised state, the material of the connection part being rendered sufficiently soft during the additional polymerisation that it can adapt to the form of at least one of the mechanical parts to which the connection part must be connected.

Abstract: A method for assembling two parts, referred to as first and second parts, the first part being produced from composite material with fibrous reinforcement embedded in a thermosetting or thermoplastic matrix, the method comprising the steps of: obtaining the first part comprising, on all or part of an outer surface, a first amorphous thermoplastic film; positioning the first part and the second part such that the first amorphous thermoplastic film is placed opposite the second part; introducing a thermosetting resin between the first amorphous thermoplastic film and the second part; at least partially polymerising the thermosetting resin. When the two parts comprise an amorphous thermoplastic film, the parts are positioned such that the respective amorphous thermoplastic films are placed opposite each other, and the thermosetting resin is introduced between the amorphous thermoplastic films.

Abstract: A part made of a fiber-reinforced composite material includes a structure made from a set of fibers supported in a thermosetting resin and a peel ply across all or part of the outer surface of the structure. The part has a gradient of polymerization at the interface between the structure and the peel ply. Also, methods for making such a part and methods for bonding such parts.

Abstract: A process for fabricating a partially polymerized prepreg material. Fibers are impregnated with thermosetting resin. The resin is partially polymerized to a degree of polymerization between 10% and 60%. The thermosetting composite parts are produced by drape forming of the prepreg material. The material laid-up in the form of tapes and heated at a temperature above the glass transition temperature of the prepreg state. The laid-up material is pressed and cooled to return the laid-up material to a temperature below the glass transition temperature of the prepreg state in question.

Abstract: A part made of a fiber-reinforced composite material includes a structure made from a set of fibers supported in a thermosetting resin and a peel ply across all or part of the outer surface of the structure. The part has a gradient of polymerization at the interface between the structure and the peel ply. Also, methods for making such a part and methods for bonding such parts.

Abstract: In order to make a structure of a composite material including elongated hollow shapes, such as hollow shapes associated with stiffeners of a stiffened panel, the invention comprises making cores including a bladder made of an elastomer material. The invention relates to a method for making such extractable cores in order to obtain cores having a very important length, and allowing the use of said cores for the industrial production of composite parts. The bladder is a cylindrical bladder that is conformed in a core mould, wherein the core itself does not have to be cylindrical, before being filled with a granular material and submitted to a negative pressure in order to impart a stable shape to the core by compaction of the granular material.

Abstract: A process for fabricating a partially polymerized prepreg material. Fibers are impregnated with thermosetting resin. The resin is partially polymerized to a degree of polymerization between 10% and 60%. The thermosetting composite parts are produced by placement of fibers of the prepreg material. The material is laid-up in the form of rovings and heated at a temperature above the glass transition temperature of the prepreg state. The laid-up material is pressed and cooled to return to a temperature below the glass transition temperature of the prepreg state. The temperatures and the pressure are determined so that the part obtained has a void content of less than 4% by volume.

Abstract: A process for fabricating a partially polymerized prepreg material. Fibers are impregnated with thermosetting resin. The resin is partially polymerized to a degree of polymerization between 10% and 60%. The thermosetting composite parts are produced by drape forming of the prepreg material. The material laid-up in the form of tapes and heated at a temperature above the glass transition temperature of the prepreg state. The laid-up material is pressed and cooled to return the laid-up material to a temperature below the glass transition temperature of the prepreg state in question.

Abstract: A structural part dissipates energy delivered during an impact that compresses the part along an axis Z, including a web having two opposite surfaces. The part includes: a through-window extending between the opposite surfaces of the web, dividing the web into a first portion and a second portion respectively, arranged in series along the Z axis; and an energy-dissipation device, including a cutting element arranged within the window and able to cut at least one of the portions of the web into strips as a result of a compressive force exerted on the part along the Z axis, and an element for clearing away the strips thus formed.

Abstract: Disclosed is a structural part (13) capable of dissipating energy delivered during an impact that compresses the part along an axis Z, including a web (131) having two opposite surfaces (133), characterized in that the part includes: a through-window (134) extending between the opposite surfaces of the web, dividing the web into two main portions, referred to as “first portion” (135) and “second portion” (136) respectively, arranged in series along the Z axis; and a device, referred to as an energy-dissipation device, including a cutting element (112, 122) arranged within the window and able to cut at least one of the portions of the web into strips (139) as a result of a compressive force exerted on the part along the Z axis, and an element (113, 123) for clearing away the strips thus formed.

Abstract: A process for the production of a core that can be used for the manufacturing of a part that is made of composite material, whereby the core consists of at least one powdered and/or granular product (16), includes introducing the at least one powdered and/or granular product (16) by vibrating it in an outer envelope (14) placed in a device (18) having a cavity that is delimited by a wall (20) whose geometry is adapted to that of the core to be produced and flattening the outer envelope (14) against the wall (20), characterized in that vibrations are emitted slightly above the fill level during filling.

Abstract: A tubular part with a complex geometrical shape, the tubular part is made of a composite material including, on the one hand, a core part made of a very high-temperature resin obtained by a 3-D direct-creation method using a very high-temperature thermoplastic resin and, on the other hand, a coating of resin-impregnated fibres. The part includes, for example, at least one internal separation of the tube into several conduits that do not communicate with one another. The part is suitable for conveying air flows in opposite or separate directions. One of the conduits can be a dedicated cable raceway.

Abstract: A part (1) includes a structural portion made of an electrically insulating or low-conductive composite material (2) and includes, on a surface (11) of the structural portion likely to be subjected to lightning impacts (10), a metallization layer (30) covered with an electrically insulating protection paint (4). The metallization layer includes a layer of a first electrically conductive metal material (31), referred to as HVT material, and includes at least one second electrically conductive metal material (32), referred to as LVT material, having a vaporization temperature ?l substantially lower than the vaporization temperature ?h of the first electrically conductive HVT metal material. A lightning impact results in the vaporization of the LVT material and the removal of the paint on a surface larger than that in which the HVT material is vaporized, and therefore exposes or lifts a portion of the metallization around the lightning impact point, thereby promoting the anchoring of the lightning arc base.

Abstract: A method for making parts (6) having a complex geometrical shape, the geometrical shape including e.g. various bends, branching, deflectors, sections or thickness, that includes the steps of: forming a core part (1) having a geometry substantially similar to that of the target shape, except for the outer thickness, using a three-dimensional creation method; wrapping at least a portion of the core part with fibres previously or subsequently impregnated with resin until the final dimensions of the target shape are reached; and curing the resin.

Abstract: The invention relates to a part (11) made of a composite formed from a thermosetting resin, which includes lightning protection element including, on an upper surface (12) of the part (11) liable to be exposed to lightning strikes, a continuous layer of a metal foil (1) having perforations (2) with a degree of perforation between 0.005% and 20%.

Abstract: A process for the production of a core that can be used for the manufacturing of a part that is made of composite material, whereby the core consists of at least one powdered and/or granular product (16), includes introducing the at least one powdered and/or granular product (16) by vibrating it in an outer envelope (14) placed in a device (18) having a cavity that is delimited by a wall (20) whose geometry is adapted to that of the core to be produced and flattening the outer envelope (14) against the wall (20), characterized in that vibrations are emitted slightly above the fill level during filling.