| 摘要 |
PROBLEM TO BE SOLVED: To provide a fiber reinforced plastic (FRP) structural body of a stable quality without defective molding, while both sufficient strength and weight saving are realized in a complicated shape. SOLUTION: Core materials 1a, 1b and 1c separately consisting of several members as basic structures are provided. An inner reinforcing layers 3 consists of a plurality of reinforcing fiber cloths 2 formed in shapes of the spread core materials 1a, 1b and 1c respectively and bonded inside the core materials. An outside reinforcing layers 4 consists of a plurality of the reinforcing fiber cloths 2 formed in shapes to wrap the core materials 1a, 1b and 1c and bonded outside the core materials 1a, 1b and 1c. Bonding surfaces of the core materials are formed so as to be opposite to a tangent to the core material surface at an angle of between 20 degrees and 70 degrees. The reinforcing fiber cloths 2 are laminated so that the adjacent reinforcing cloths 2 near bonding parts of the core materials are alternately overlapped. Further, the overlapping parts are shifted in a staircase pattern so as to cover all of the bonding parts of the core materials, and bonded. |
