The invention relates to a method and a device for producing an annular multiaxial laid fabric and to an annular object produced therewith. The object of the invention is therefore to create a method and a device for forming a multiaxial laid fabric for annular structures which has no twisting or displacement of the thread layers. Furthermore, it should no longer be necessary to close a butt join or overlap separately to form a closed ring of the multiaxial laid fabric. This object is achieved in that at least a lower thread layer (2a) and an upper thread layer in the form of an endless thread array or an endless single thread, or in the form of thread-array sections or single-thread sections, are laid around the entire circumference of two mutually spaced ring elements (3) with differing thread orientations, and the first and upper thread layers (2a, 2b) are then fixed to each other at points.

A method of manufacturing a fan blade for a gas turbine engine. The method includes providing a compression mould having an internal mould surface corresponding to an outer profile of a fan blade, providing opposing first and second laminates to form a shell corresponding to the mould surface, each laminate comprising a lay-up of plies of fibre reinforcement material, applying a core material comprising quasi-isotropic short fibre reinforced resin in the compression mould so that with the compression mould in a moulding configuration the core material is enclosed by the shell, the core material and the shell forming a pre-form for the fan blade, applying pressure to compress the pre-form so that it conforms to the mould surface, and applying heat to cure the pre-form.

Provided is a method of manufacturing a rotor blade of a wind turbine, the method including: placing fiber material on a shape forming surface; arranging phase change material being in a first state at at least one predetermined first region and/or arranging phase change material being in a second state at at least one predetermined second region; soaking the fiber material) with resin to be in thermal contact with the phase change material at the first region and/or second region; during a crosslinking reaction for crosslinking the resin: absorbing heat generated within the resin by the phase change material at the first region); and/or releasing heat from the phase change material toward the resin at the second region(.

Provided is a method of manufacturing a rotor blade of a wind turbine, the method including: placing fiber material on a shape forming surface; arranging phase change material being in a first state at at least one predetermined first region and/or arranging phase change material being in a second state at at least one predetermined second region; soaking the fiber material) with resin to be in thermal contact with the phase change material at the first region and/or second region; during a crosslinking reaction for crosslinking the resin: absorbing heat generated within the resin by the phase change material at the first region); and/or releasing heat from the phase change material toward the resin at the second region(.

A windmill blade includes a blade main body and a leading edge protector. The leading edge protector includes a conductive plate covering a leading edge, and a conductive mesh member connected to the conductive plate along a blade chord direction of the windmill blade. The conductive mesh member is provided with a plurality of holes. A skin or an adhesive at least partially enters the plurality of holes, so that the leading edge protector is fixed to the skin.

A cross-corrugated support structure includes a sheet having a first and a second set of corrugations. The first set of corrugations is defined by a series of alternating ridges and grooves that extend the length of the sheet in a first direction. The second set of corrugations is also defined by a series of ridges and grooves that extend the length of the sheet in a second direction that intersects with the first direction. The intersection of the first and second set of corrugations creates cross-corrugations throughout the sheet. To provide compressive and tensile strengths suitable for large-scale construction applications, the sheet may be made of a carbonaceous material such as carbon fiber or graphite treated to rigidly retain a shape including the first and second set of corrugations within the sheet. The sheet may be reinforced by securing support members or additional corrugated sheets to the sheet.

A cross-corrugated support structure includes a sheet having a first and a second set of corrugations. The first set of corrugations is defined by a series of alternating ridges and grooves that extend the length of the sheet in a first direction. The second set of corrugations is also defined by a series of ridges and grooves that extend the length of the sheet in a second direction that intersects with the first direction. The intersection of the first and second set of corrugations creates cross-corrugations throughout the sheet. To provide compressive and tensile strengths suitable for large-scale construction applications, the sheet may be made of a carbonaceous material such as carbon fiber or graphite treated to rigidly retain a shape including the first and second set of corrugations within the sheet. The sheet may be reinforced by securing support members or additional corrugated sheets to the sheet.

A resin barrier device for connection in a vacuum line, for use in resin infusion during composite manufacture, includes a housing having an inlet port for connection to a resin source and an outlet port for connection to a vacuum source. A flow path extends between the inlet and outlet ports. A gas-permeable membrane is disposed across the flow path to prevent resin from flowing to the vacuum pump. A gasket supports the membrane and is adapted to prevent resin leakage. A method of infusing a preform with a resin also is provided.

A resin barrier device for connection in a vacuum line, for use in resin infusion during composite manufacture, includes a housing having an inlet port for connection to a resin source and an outlet port for connection to a vacuum source. A flow path extends between the inlet and outlet ports. A gas-permeable membrane is disposed across the flow path to prevent resin from flowing to the vacuum pump. A gasket supports the membrane and is adapted to prevent resin leakage. A method of infusing a preform with a resin also is provided.

A method of manufacturing a composite fan blade with an outer part and a core includes laying up a plurality of continuous plies to achieve a stack, placing the core on a central portion of the stack of continuous plies to achieve an unfolded preform; folding the contin-uous plies about the core, such that the central portion of the stack folds about the core and the first portion is superimposed to the second portion, to achieve a folded preform; apply-ing pressure to the folded preform to achieve a consolidated curved folded preform; curing the consolidated curved folded preform to achieve the composite fan blade.