Abstract: Provided is a method of manufacturing a vehicle skeleton member, the skeleton member including one or more groove-shaped portions extending in a predetermined direction, the method including an extrusion step and a press-working step. In the extrusion step, a sheet-shaped member including one or more first sheet-shaped portions each having a band-like shape, which extend in the predetermined direction, and second sheet-shaped portions each having a band-like shape, which extend in the predetermined direction along end portions of the first sheet-shaped portion in a width direction of the first sheet-shaped member and each have a sheet thickness smaller than a sheet thickness of the first sheet-shaped portion, is manufactured by using an extrusion molding method.

Abstract: A composite structure having a laminated structure made of fiber reinforced plastic and metallic material comprises a base member(s) made of metallic material; and a reinforcement member(s) made of fiber reinforced plastic, the reinforcement member(s) comprising: a first reinforcement part(s) made of fiber reinforced plastic including reinforcement fibers which are aligned in a uni-direction, and a second reinforcement part(s) made of fiber reinforced plastic including at least reinforcement fibers which are aligned in a crossing direction relative to the uni-direction in which the reinforcement fibers of the first reinforcement part(s) are aligned, and interposed between the base member(s) and the first reinforcement part(s), the reinforcement member(s) further comprising a thermosetting resin included in a bonding site with the base member(s).

Abstract: A composite structure having a laminated structure made of fiber reinforced plastic and metallic material comprises a base member(s) made of metallic material; and a reinforcement member(s) made of fiber reinforced plastic, the reinforcement member(s) comprising: a first reinforcement part(s) made of fiber reinforced plastic including reinforcement fibers which are aligned in a uni-direction, and a second reinforcement part(s) made of fiber reinforced plastic including at least reinforcement fibers which are aligned in a crossing direction relative to the uni-direction in which the reinforcement fibers of the first reinforcement part(s) are aligned, and interposed between the base member(s) and the first reinforcement part(s), the reinforcement member(s) further comprising a thermosetting resin included in a bonding site with the base member(s).