In an aspect, the present disclosure is directed to a composite structure. The composite structure includes a three-dimensional (3-D) grid structure and at least one monolithic skin layer at least partially enveloping and securing the grid structure. As such, the grid structure is configured to stabilize the composite structure under at least one of: static local buckling and dynamic global buckling.

An apparatus for manufacturing a composite article from a composite material. The apparatus comprising: a pulsed broadband radiation source comprising a flashlamp and a light guide adapted to guide light emitted by the pulsed broadband radiation source to a target area. The light guide comprises at least a portion ahead of the pulsed broadband radiation source, relative to the target area, comprising a light transmitting material.

A fiber arranging device includes first guides, a first moving mechanism, second guides, a second moving mechanism and a roller. The first guides guide a first feeding of first tapes in a first feeding direction. The first tapes are first fibers or prepregs. The first moving mechanism changes an interval between the first guides, for the first feeding of the first tapes with a first interval. The second guides guide a second feeding of second tapes in a second feeding direction. The second tapes are second fibers or prepregs. The second moving mechanism changes an interval between the second guides, for the second feeding of the second tapes with a second interval. The roller feeds the first tapes and the second tapes in a same feeding direction by disposing the first tapes and the second tapes alternately.

A method for forming a fiber-reinforced thermoplastic part may comprise the steps of locating a lightning strike protection layer on a mold surface of a mold tool, locating a thermoplastic layer over the mold tool, heating the thermoplastic layer to a pliable forming temperature, conforming the thermoplastic layer to a mold surface of the mold tool, and depositing a plurality of fiber strips over the thermoplastic layer.

A method of fabricating a fiber structure by multilayer three-dimensional weaving between a plurality of weft yarns and of warp yarns, the fiber structure having at least first and second portions that are adjacent in the warp direction, the first portion presenting, in a direction perpendicular to the warp and weft directions, a thickness greater than the thickness of the second portion, includes making the first portion using a step of three-dimensionally weaving warp and weft layers in which a fiber fabric is formed in the form of a Mock-Leno weave grid in a core of the first portion together with skins at a surface of the first portion, a weave of the skins being modified locally so as to deflect certain warp yarns from said skins and weave them with the fiber fabric in the form of the Mock-Leno weave grid.

A fiber application head comprising a compaction system including several independent compaction rollers and compaction cylinders and, for each fiber, cutting means and rerouting means. For each fiber, the head comprises a functional module including cutting means and rerouting means. Each functional module is mounted so as to be movable in translation along a compaction direction on a support element of the head. Each compaction roller is mounted on one or more adjacent functional modules. A compaction cylinder is associated with the functional module(s) associated with a compaction roller for the displacement in translation of the functional module(s). The compaction rollers are arranged in a single row.

A method for fabricating a composite part using a 3D printing machine. The method includes forming the part by depositing a plurality of part layers in a consecutive manner on top of each other where each layer is deposited by laying down rows of filaments made of a thermoplastic composite material. Reinforcing Z-pins are then inserted through the part layers to provide reinforcement of the part in the Z-direction. A plurality of additional part layers are deposited in a consecutive manner on top of each other on the part layers including the reinforcing Z-pins where each additional part layer is also deposited by laying down rows of filaments made of a thermoplastic composite material. Reinforcing Z-pins are also inserted through the additional part layers to provide reinforcement of the part in the Z-direction.

A method of a coating by additive manufacturing on a turbomachine casing includes depositing on an internal surface of the turbomachine casing a filament of an abradable material to create a three-dimensional scaffold of filaments. A filamentary material deposition system is positioned from the internal surface of the casing; a first layer of the coating is deposited over 360′; a rotation of the filamentary material deposition system is carried out by a first predetermined angle and the filamentary material deposition system is positioned from the deposited layer; a second layer of coating is deposited on the first coating layer, on a sector of the casing; a displacement is carried out corresponding to the first sector already covered, then for the following sectors until 360° is covered; and after having carried out a rotation of the filamentary material deposition system.

A method, apparatus, system, and computer program product for designing a composite hollow body. A computer system selects ply layers for the hollow composite body. The ply layers comprise courses having course edges. The computer system positions the course edges between the ply layers throughout the hollow composite body to create a staggering of the course edges between the ply layers for a design of the hollow composite body.

An automated fiber bundle placement apparatus is configured to lay a strip-like fiber bundle impregnated with a thermoplastic resin on a stacking surface on an upper side of a placement die by moving a placement head and by emitting a laser from an emitting device to deposit the fiber bundle on the stacking surface incompletely. The emitting device is configured to emit the laser toward the fiber bundle laid on the stacking surface to its surface that is a reverse side of its surface facing the stacking surface.