Patent ID: 11891122
Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 10:
11. A frame which is made of a fiber reinforced composite, has an enclosed cross-section defining a plurality of corners, and has a predetermined length, the frame comprising:
a compressive wall part where a compressive stress occurs in a longitudinal direction of the frame when the frame receives a bending load in a normal direction perpendicularly intersecting the longitudinal direction; and
a side wall part extending in the normal direction and defining one of the corners with the compressive wall part, wherein
the compressive wall part includes a longitudinal alignment layer having reinforcement fibers aligned in the longitudinal direction, and
the side wall part has a surface section composed of a differential alignment layer having reinforcement fibers aligned in a direction different from the longitudinal direction, and wherein
the compressive wall part further includes a normal directional alignment layer having reinforcement fibers aligned in the normal direction, and
the longitudinal alignment layer is located closer to a surface of the compressive wall part than the normal directional alignment layer.