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

Claim 0:
1. 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;
a side wall part extending in the normal direction and defining one of the corners with the compressive wall part; and
a tension wall part which is away from the compressive wall part and extends in the longitudinal direction, and where a tensile stress occurs in the longitudinal direction when the frame receives the bending load, wherein
each of the compressive wall part and the tension wall part includes a longitudinal alignment layer having reinforcement fibers aligned in the longitudinal direction,
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,
a connection section where layers constituting the compressive wall part are connected to layers constituting the side wall part lies in the compressive wall part, and/or a connection section where layers constituting the tension wall part are connected to layers constituting the side wall part lies in the tension wall part, and
the connection section is away from the corresponding corners of the frame.