A composite spring made of a wire of a longitudinal axis curved around a spring axis in a winding direction and a method of fabrication thereof, the spring, the wire comprising a core; and fibers layers wound around the core, and an angular positioning, relative to the spring axis, of each one of the fiber layers being selected, along a length of the core, depending on the winding direction of the wire about the spring axis, to adjust at least one of: high natural frequency of the spring, resistance to buckling and resistance to tensile and compressive stress components induced by a compressive load on the spring.

A method for reinforcing a substrate or textile of a core structure of a component with the following method steps: a continuous semi-finished product is fed, via a feed means, into a cartridge of a conveying means which comprises a plurality of cartridges; the continuous semi-finished product is cut to length using a cutting means in order to produce a cut, reinforcing semi-finished product which is received in the cartridge; the cartridge is conveyed to a machining means; the cut, reinforcing semi-finished product is sharpened using the machining means; the cartridge is conveyed to a textile or substrate to be reinforced of a core structure; and the sharpened semi-finished product is shot into the textile or substrate of a core structure by a stud-shooting means.

A method for reinforcing a substrate or textile of a core structure of a component with the following method steps: a continuous semi-finished product is fed, via a feed means, into a cartridge of a conveying means which comprises a plurality of cartridges; the continuous semi-finished product is cut to length using a cutting means in order to produce a cut, reinforcing semi-finished product which is received in the cartridge; the cartridge is conveyed to a machining means; the cut, reinforcing semi-finished product is sharpened using the machining means; the cartridge is conveyed to a textile or substrate to be reinforced of a core structure; and the sharpened semi-finished product is shot into the textile or substrate of a core structure by a stud-shooting means.

In a fiber structure woven as a single piece by three-dimensional weaving, first warp yarns interlink layers of weft yarns in a first portion of the fiber structure adjacent to a non-interlinked zone and also weft yarns of a second portion of the fiber structure beyond the non-interlinked zone, and second warp yarns interlink layers of weft yarns of the second portion of the fiber structure adjacent to the non-interlinked zone and also layers of weft yarns of the first portion of the fiber structure beyond the non-interlinked zone, such that the paths of the first and second warp yarns cross in at least one transition zone extending within the fiber structure from the end of the non-interlinked zone, the transition zone extending in the warp direction over a distance greater than the pitch between adjacent warp columns.

In a fiber structure woven as a single piece by three-dimensional weaving, first warp yarns interlink layers of weft yarns in a first portion of the fiber structure adjacent to a non-interlinked zone and also weft yarns of a second portion of the fiber structure beyond the non-interlinked zone, and second warp yarns interlink layers of weft yarns of the second portion of the fiber structure adjacent to the non-interlinked zone and also layers of weft yarns of the first portion of the fiber structure beyond the non-interlinked zone, such that the paths of the first and second warp yarns cross in at least one transition zone extending within the fiber structure from the end of the non-interlinked zone, the transition zone extending in the warp direction over a distance greater than the pitch between adjacent warp columns.

A method produces a seat cover for a vehicle seat made of a form-fit knit part. The form-fit knit part has continuous fibers and reinforcing fibers, and each of the reinforcing fibers is made of a core fiber and a cladding fiber coaxially sheathing the core fiber. The form-fit knit part is first produced using a knitting machine, and the seat cover is subsequently produced from the form-fit knit part using an ironing machine. The ironing machine has at least one lower mold in the shape of the vehicle seat, and the core fiber has a higher melting point than the cladding fiber.

A method produces a seat cover for a vehicle seat made of a form-fit knit part. The form-fit knit part has continuous fibers and reinforcing fibers, and each of the reinforcing fibers is made of a core fiber and a cladding fiber coaxially sheathing the core fiber. The form-fit knit part is first produced using a knitting machine, and the seat cover is subsequently produced from the form-fit knit part using an ironing machine. The ironing machine has at least one lower mold in the shape of the vehicle seat, and the core fiber has a higher melting point than the cladding fiber.

The invention relates to a blade of a fan of a turbomachine, comprising a structure made from composite material, including a fibrous reinforcement Obtained by means of the three-dimensional weaving of strands and a matrix in which the fibrous reinforcement is embedded. According to the invention, the fibrous reinforcement comprises a first portion forming the leading edge and a second portion forming all or part of the trailing edge, and the strands of the fibrous reinforcement comprise first strands having a predetermined elongation at break and second strands having an elongation at break higher than that of the first strands, the first portion comprising all or some of the first strands while the second portion comprises all or some of the second strands.

The invention relates to a blade of a fan of a turbomachine, comprising a structure made from composite material, including a fibrous reinforcement Obtained by means of the three-dimensional weaving of strands and a matrix in which the fibrous reinforcement is embedded. According to the invention, the fibrous reinforcement comprises a first portion forming the leading edge and a second portion forming all or part of the trailing edge, and the strands of the fibrous reinforcement comprise first strands having a predetermined elongation at break and second strands having an elongation at break higher than that of the first strands, the first portion comprising all or some of the first strands while the second portion comprises all or some of the second strands.

The invention relates to an inter-blade platform of a turbomachine fan, comprising: —a base comprising a first surface configured to delimit a flow path in the fan and a second surface on the opposite side from the first surface, —two flanks extending radially next to the second surface, each of the flanks having a sacrificial free end configured to bear against a fan disc.