A composite structure manufacturing method comprising: a lamination step in which a plurality of fiber-reinforced resin sheets are laminated to form a plate-shaped laminate; a pressing deformation step in which a third roller or similar, which rolls along a plate surface of the laminate, is used to press the plate surface of the laminate, thereby forming a recessed section or a protruding section in a prescribed section of the laminate; a short direction deformation step in which, after the pressing deformation step, the laminate is deformed in the short direction to make the long direction cross-section into a prescribed shape; and a long direction deformation step in which, after the pressing deformation step, the laminate is deformed in the long direction to make the short direction cross-section into a prescribed shape.

A fiber-reinforced composite material includes a matrix resin, and reinforcing fibers, in which the matrix resin includes a polyaryl ketone resin and a resin having a nitrogen atom in a repeating structural unit. A surface of the fiber-reinforced composite material includes a portion in which a contact angle with water is 60° or less.

A unidirectional laminate comprising a fiber reinforced composite material having a main relaxation temperature (Tα) in a range between about 110° C. and 140° C. The composite comprises a plurality of unidirectional reinforcement fibers coated with a sizing composition and a matrix resin. The unidirectional laminate has a tensile modulus of at least 45 GPa at a fiber volume fraction greater than or equal to 50% and fatigue mechanical performance of at least 450 MPa at 1 MM cycles, measured according to ASTM E 739-91.

A method for improving the translation efficiency of fiber strength into composite strength is provided. A single unidirectional tape, single unidirectional fiber web or a stack of unidirectional web/unidirectional tape plies formed from partially oriented fibers/tapes is primed under mild conditions followed by subjecting the primed plies to an axial extension stress in the axial fiber direction of each fiber ply by passage through a compression apparatus. The axial extension stress extends the fibers, strengthening them, while also compacting the plies together and thereby forming a composite having improved strength. Production yield is improved by avoiding maximal fiber stretching and thereby avoiding typical manufacturing loss, and low weight composite armor having increased strength is achieved.

A tube body production method includes: a disposing step of disposing carbon fibers with respect to an outer circumferential surface of a mandrel so that the carbon fibers extend in the axial direction of the mandrel; and a molding step of impregnating the fiber body with a resin on the outer circumferential surface of the mandrel and then heating the resin to mold the resin, wherein the disposing step and the molding step are performed in a state where the axial direction of the mandrel coincides with an up-down direction.

A composite hat stringer for stiffening a panel includes a plurality of composite fabric plies arranged to form a cap, a pair of flanges and a pair of webs respectively connecting the cap with the pair of flanges. The cap includes at least one 0° composite tape ply interleafed in the composite fabric plies within the cap.

A laminate has stacked fiber-reinforced thermoplastic resin base materials that can be easily welded without affecting physical properties, and a welded article thereof. The laminate is obtained by stacking five or more layers of fiber-reinforced thermoplastic resin base materials, wherein the fiber-reinforced thermoplastic resin base materials are obtained by impregnating continuous reinforcing fibers having conductivity, which are aligned in parallel, with a thermos-plastic resin.

A layered body includes a first layer with a plurality of first composite sheets, and a second layer with a plurality of second composite sheets in a state of contacting the first layer. The first composite sheets are disposed along an arrangement direction shaped as a curved line so that an end in a first longitudinal direction of one first composite sheet and an end in the first longitudinal direction of an adjacent first composite sheet are close to each other without overlapping in the thickness direction, and so that the first longitudinal directions of the sheets intersect each other. The second composite sheets are disposed along the arrangement direction so that an end in a second longitudinal direction of one second composite sheet and an end in the second longitudinal direction of an adjacent second composite sheet are close to each other without overlapping in the thickness direction.

A fiber preform for use in an overmolding process is provide that includes a fiber bundle arranged in a predetermined pattern and attached to itself with thread stitches to form at least one preform layer. At least one intumescent material is associated with the at least one preform layer. A vehicle component having fire resistant characteristics is also provided that includes a housing having a first side and a second side. The housing has a shape that defines the vehicle component. An intumescent material is provided on at least one of the first side and the second side of the housing.

Certain configurations of composite panels are described that comprise at least one aesthetic edge. In some embodiments, the composite panel with the aesthetic edge comprises a sandwich panel coupled to a shell layer. The sandwich panel may comprise skin layers and a core layer.