The present application discloses a method of making a preform for use in manufacturing a component made of a composite material. The method includes stitching fibers onto a film to form a fiber bed in a two-dimensional shape, removing the film from the fiber bed, and adjusting the fiber bed into a three-dimensional shape to form the preform.

Grid structure, such as a lattice or grid-stiffened structure and a process of manufacturing such a grid structure. Fiber material is laid up on a base tool to form intersecting ribs defining a grid with a plurality of cavities. In the same step fiber material is laid to form one or more; local substructures. Blocks are placed, at the positions of the cavities. The fiber material of the ribs and. the local substructures is impregnated with a resin. Optionally, one or more layers of fiber material are placed on the base tool and/or over the ribs and the blocks to form an outer skin. The ribs, the local substructure and optionally the outer skin jointly consolidated to form, the grid, structure.

A rim for a bicycle wheel includes a radially inner portion disposed along an inner circumference of the rim. The rim also includes a first sidewall, a second sidewall spaced apart from the first sidewall, and a radially outer tire engaging portion disposed along an outer circumference of the rim. The first sidewall, the second sidewall, the radially outer tire engaging portion, the radially inner portion, or any combination thereof includes a composite laminate. The composite laminate includes a layer of a composite material. The composite material includes a matrix of a polymer-based material and natural fibers of a reinforcing material. A volume of a respective one of the natural fibers of the layer of the composite material is greater before lamination of the composite laminate compared to the volume of the respective one natural fiber after the lamination of the composite laminate.

A reinforcing body and a method for its manufacturing. The reinforcing body has at least one reinforcing bar. Each reinforcing bar has a core with a peripheral surface at which a rib structure with at least one rib and at least one depression is provided. The core is formed by at least one first fiber strand embedded in a core matrix. For creating the at least one rib at least one second fiber strand is embedded into a rib matrix, wherein the at least one second fiber strand and the rib matrix are separated by at least one depression in a direction parallel to a longitudinal center axis of the reinforcing bar, such that the at least one second fiber strand is separated into fiber strand sections. The at least one first and the at least one second fiber strand have fibers of different materials.

A multi-part compression mold for forming a complex part having a desired fiber alignment, and methods therefor, are disclosed. The multi-part mold comprises at least three sections. Specific arrangements of fiber-bundle-based preforms are introduced to more than one of the mold sections of the multi-part mold, and subjected to compression molding. The arrangements of preforms, in conjunction with the multi-part mold, result in a complex part having fibers that substantially align with anticipated principle stress vectors that arise in the complex part, when in use.

An object is to provide an incised prepreg having desired formability stably, wherein the incised prepreg contains unidirectionally oriented reinforcing fibers and matrix resin and has an incised region containing a plurality of incisions made to divide reinforcing fibers, wherein the incised region includes a plurality of incision rows, each containing a plurality of incisions having nearly equal fiber-directionally projected lengths and aligned at substantially constant intervals in the fiber direction and wherein the distance L1, measured at right angles to the fiber direction, between two incision rows located on either side of an arbitrarily selected incision row and the fiber-directionally projected length L2 of the latter incision row satisfy the following relation: −1.0<L1/L2<0.5.

Embodiments disclosed herein are directed to systems and methods for producing high quality 3-dimensional prints using various materials. Aspects of the present disclosure may provide particular advantages when used with high temperature thermoplastics (such as polyetherimide (PEI) polymers), such as when using continuous fibers impregnated with a high temperature thermoplastic, or when co-depositing a continuous fiber with a formation material containing a high temperature thermoplastic.

A composite part is provided and includes a component, a first set of first composite plies with finite lengths and a second set of second composite plies with finite lengths. A respective end of each of the first composite plies is wrapped around the component in a clockwise wrapping direction and includes first fibers. A respective end of each of the second composite plies is wrapped around the component in a counter-clockwise wrapping direction and includes second fibers.

A method is provided for forming connections from reinforcing fibers between faces of a wall for a pressure container. The reinforcing fibers are gripped by tufting needles and are pushed through the faces, and loops are formed through which support elements are introduced. A corresponding method produces a pressure container.

The invention relates to a method for manufacturing a part made from composite material, having a body and one or more continuous fibre bundles in its interior, characterised in that it comprises the stages of: a) obtaining a body that includes one or more tubular cavities in its interior that extend between a first end, disposed on the outer surface of the body and which comprises an inlet orifice, and a second end, opposite to the first end; b) introducing resin in the liquid state and a continuous fibre bundle in the interior of at least one tubular cavity through its inlet orifice; and c) curing the resin until it solidifies, adhering to the body and fixing the continuous fibre bundle. The invention also relates to a system for manufacturing a part made from composite material and to the part made from composite material obtained.