A method of manufacturing a composite laminate may include laying up bands of composite material in layers to form a composite layup. At least one layer may have at least one gap between an adjacent pair of bands. The gap may extend continuously along a lengthwise direction of the band. The gap in two or more of the layers may be fluidly interconnected and may form at least one breather path that opens to an exterior of the composite layup.

A method to produce a unidirectional reinforcement for fiber reinforced composites by a resin transfer or vacuum infusion molding process include: laying continuous rovings unidirectionally side by side in one layer for forming a unidirectional web, applying thermoplastic or thermoset binder on the web, activating the binder for bonding the rovings together to form a unidirectional reinforcement, and forming flow passages for resin in a direction transverse to the direction of the unidirectional rovings by laying thin discrete flow passage having, under compression, an aspect ratio of equal or less than 2 on the continuous unidirectional rovings.

Wind turbine blade has a longitudinal direction and includes a shell structure made of a fiber-reinforced polymer material including a polymer matrix and reinforcement material comprising a plurality of carbon fiber layers embedded in the polymer matrix. At least a portion of the shell structure is formed of a laminate 6 comprising at least one metal filament layer 15, 18 comprising metal filaments and being sandwiched between two carbon fiber layers 16, 16; 17, 18 comprising carbon fibers only. The carbon fiber layers are arranged contiguously with the metal filament layer.

A system for manufacturing a composite article may include a resin-wetting control layer configured to be placed in contact with a composite ply of a composite preform. The resin-wetting control layer may be configured complementary to a ply surface of the composite ply.

The present disclosure relates to a spar cap (10) for a wind turbine blade (1000) comprising: a plurality of spar cap layers (20) and a first interlayer (30) arranged between the first spar cap layer (20a) and the second spar cap layer (20b) and comprising: a number of first interlayer areas (31), including a first primary interlayer area (31a), comprising a first number of interlayer sheets (33) comprising a first plurality of fibres (35); and a number of second interlayer areas (32), including a second primary interlayer area (32a), comprising a second number of interlayer sheets (34) comprising a second plurality of fibres (36), wherein the first number of interlayer sheets (33) is of a different characteristic than the second number of interlayer sheets (34).

A laminate preform is disclosed, having a top side and a back side extending between respective edge portions, the laminate preform comprising a plurality of layers of fiber tows extending in a length direction of the laminate pre-form, the fiber tows being at least partly fixed by resin. The laminate pre-form is in between a first and a second prepreg or semi-preg layer including fibers extending in an oblique direction with respect to the length direction, and at least one distribution channel is provided at the back side extending in the length direction. Also disclosed is a method for manufacturing such a laminate pre-form.

The disclosure relates to a fibre reinforced plastic composite material, including a vacuum assisted resin transfer moulded fibre reinforced plastic laminate prepared by use of a resin flow enhancing member, including a cavity with a first opening and a second opening as well as an resin flow adjusting arrangement for changing a resin flow cross section in a resin flow direction from the first opening to the second opening in the resin flow enhancing member by applying vacuum to the second opening. The resin flow adjusting arrangement includes a plurality of vacuum expandable filler elements that includes gas-filled closed cell cavities and flexible walls. The disclosure further relates to a vacuum assisted resin transfer moulding process for injecting resin from a resin flow enhancing member into a fibre stack.

Systems, methods, and apparatus are disclosed for controlling a flow of a material through a vehicle component. In some embodiments, the apparatus may include a plurality of baffle layers, each baffle layer of the plurality of baffle layers having a contour, wherein at least one space between at least some of the plurality of baffle layers defines at least one flow path. The apparatus may also include a first plurality of spacers positioned in the at least one flow path, the first plurality of spacers having one or more hydrodynamic properties determined based on a first plurality of dimensions, the one or more hydrodynamic properties determining, at least in part, a second flow property of the at least one flow path.

A precured fibrous composite strip for a load-carrying structure for a wind turbine blade has a first longitudinal end and a second longitudinal end, a first side and a second side with a width defined as the distance between the first side and the second side, and an upper surface and a lower surface with a thickness defined as the distance between the upper surface and the lower surface. The strip includes a taper region with a taper length at the first longitudinal end. The taper region tapers in thickness towards the first longitudinal end. The taper region includes a first taper section proximal to the first longitudinal end and having a first average taper angle, a third taper section distal to the first longitudinal end and having a third average taper angle, and a second taper section between the first taper section and the third taper section.

The present invention relates to a method of manufacturing a blade shell member for a wind turbine blade. The method comprising providing a blade mould for the blade shell member and arranging a number of fibre-reinforced layers on a blade moulding surface of the blade mould. A first primer layer is applied on top of the fibre-reinforced layers, at a pre-determined spar cap region. Furthermore, a pre-manufactured spar cap having an upper surface, a lower surface, a first side surface, a second side surface, a first end surface and a second end surface is arranged in the pre-manufactured spar cap on the spar cap region, such that the lower surface of the pre-manufactured spar cap contacts the first primer layer arranged on the spar cap region. A second primer layer is also applied to the upper surface of the pre-manufactured spar cap before the step of infusing the blade moulding cavity with resin and curing it. The present invention further relates to a method of manufacturing a wind turbine blade, comprising the steps of manufacturing a pressure side shell half and a suction side shell half over substantially the entire length of the wind turbine blade and subsequently closing and joining the shell halves for obtaining a closed shell.