Curved stiffener for a turbomachine cowl composed of a resin-impregnated fibrous reinforcement, including a stack of a plurality of layers of fibers stacked along the thickness direction and extending on the entire width of the fibrous reinforcement, each layer of fibers having a plurality of fibers parallel to each other extending along a direction inclined relative to the length direction, the fibers of two consecutive layers of fibers along the thickness direction have directions inclined relative to each other, and the layers of fibers are sewn together by sewing threads extending along the length direction, the fibrous reinforcement includes a layer of reinforcing fibers having a plurality of fibers parallel to each other extending along the length direction, the layer of reinforcing fibers extending at least on the central part, over a width smaller than the width of the fibrous reinforcement.

A method for integrating a fitting (110) fitted between two wings of a composite profile (100) comprising the steps of: i) obtaining a preform of a fitting impregnated with a thermosetting resin, comprising two flanges (111) and a rib (114); ii) pre-curing the laminate preform of the fitting to obtain a partial polymerization of the preform; iii) laying up a laminate preform of the profile so that fibers impregnated with a thermosetting resin included in two of the wings of the laminate preform of the profile are laid up over the two flanges of the preform of the partially polymerized fitting; and iv) completely polymerizing an assembly comprising the laminate preform of the profile and the laminate preform of the partially polymerized fitting while maintaining into contact the flanges of the laminate preform of the fitting with the wings of the laminate preform of the profile.

The invention also pertains to a tooling for implementing the method and a wing spar obtained by this method.

A fiber composite component having a first and a second fiber composite element each bent along a transverse axis opf the fiber composite component to have, respectively, in succession, a first and second base flange, a first and second web section, a first and second top flange and a first and second stiffening web. Respectively, the first and second base flanges are parallel to the first and second top flanges, the first and second web sections are angled with respect to each of the first and second base flanges and the first and second top flanges, the first and second stiffening webs are at right angles with respect to the first and second top flanges, and the first stiffening web and the second stiffening web are congruent with respect to one another, and are connected to one another, along a longitudinal axis of the fiber composite component.

A system and method for forming a composite filler. The method comprises applying a pressure to a first portion of a composite material blank with a pair of forming dies of a composite filler forming apparatus, the pair of forming dies having a pair of convex radii, each forming die of the pair of forming dies having a respective convex radius of the pair of convex radii. The method also repeats the applying step to a subsequent portion of the composite material blank to incrementally form the composite material blank into a desired cross-section along its length.

Control and stabilizing cables and tendons for high altitude aircraft and airships having lightweight, high strength and low CTE are disclosed, along with a method and machine for fabrication of same. The cable is comprised of a fiber prepreg tow encased in a polymer sleeve with one bobbin at each end to facilitate connections. Consolidating the fiber prepreg tow along the length of the cable using high temperature shrink tubing, such as polyvinylidene fluoride (PVDF), allows for eliminating the twisting of the fiber prepreg tow, thus reducing the number of wraps around the bobbins. Eliminating the twists in the fiber prepreg tow also reduces the length of fiber needed, and therefore the overall change in length of the control cable with temperature variations is reduced. Additional cable strength can be achieved by adding and holding significant tension on the fiber prepreg tow by applying weight during the curing process.

A method for manufacturing an insulating bar made from a thermoplastic plastics material whereof the base body has a corrugated structure comprises shaping the insulating bar as a blank having a substantially planar structure of the base body without raised portions and recesses but with the connection strips, cooling the blank to a temperature corresponding to the maximum long-term service temperature of the plastics material or lower, heating the base body to a forming temperature which, for crystalline plastics materials, is approximately 30 C. below the crystallite melting point of the plastics material or higher, and for amorphous plastics materials, is approximately 30 C. above the softening point or higher, forming the base body by a tool to produce the alternating raised portions and recesses, while retaining the geometry of the connection strips, and cooling the insulating bar to a temperature corresponding to the maximum long-term service temperature or lower.

Method of making a spar cap includes: providing a plurality of composite strips, each strip being of constant cross section defined by first and second sides and edges, the first and second sides comprising first and second abutment surfaces, the strip being of uniform thickness between the abutment surfaces, a first edge region of the strip comprising a first edge being of relatively reduced thickness, the first side of the strip comprising an edge surface, and the strip having a peel ply layer at least partially covering the first abutment surface and the edge surface; removing the peel ply layers; stacking the strips such that the first abutment surface abuts an abutment surface of an adjacent strip to define an interface region, such that a clearance region is defined; supplying resin to the respective clearance regions and causing the resin to infiltrate into the interface regions; and curing the resin.

A method of molding composite materials including shaping a laminate having fiber sheets laminated over one another, by bending the laminate in an X-direction and a Y-direction, in a three-dimensional orthogonal coordinate system. The method further includes mounting the laminate that has been shaped, onto a mold material deformed in a Z-direction, impregnating a resin material into the laminate while adjusting an amount of the resin material filled in, and molding the composite materials that have cured such that the composite materials are shaped to have a first inclined surface inclined at a first inclination angle with respect to a reference plane in the Z-direction. The mold material has a first inclination molding surface that molds the first inclined surface, and a second inclination molding surface that molds a surface of the composite materials into a second inclined surface having a second inclination angle smaller than the first inclination angle.

An exemplary inventive molding device includes two mold components characterized by matching rounded-star shapes. Each mold component includes eight congruent rounded-tip projections and eight congruent apertured sections separated from each other by the projections and describing a ring shape. The projections correspond to the equiangular points of a star. Each section has a medial hole and is interposed between and connects two projections. The mold components are joined so that their respective projections and holes are even with each other and fasteners are installed through the holes. Appropriate introduction and curing of a castable material inside the joined mold components produces a flexible device suitable for use as part of a biomimicking soft robot.

A forming method according to the present disclosure includes a laminating step for forming an intermediate formed article by supplying and laminating a fibrous sheet onto forming surfaces of a forming die for forming the intermediate formed article; and a bending process step for performing a bending process on the intermediate formed article, which is laminated on the forming surfaces and has a shape that corresponds to the forming die, to yield a formed article. The forming surfaces have shapes that correspond to the intermediate formed article to be formed. The second forming surface is bent with respect to the first forming surface among the forming surfaces, and the angle formed by the first forming surface and the second forming surface is greater than the bending angle of the cross-section of the formed article to be formed and less than 180 degrees.