US 12,116,044 B2
Frame which is made of fiber reinforced composite
Chikara Kawamura, Hiroshima (JP); Yuki Kodama, Hiroshima (JP); Kenji Nishida, Hiroshima (JP); Tetsuya Sugiyama, Tokyo (JP); and Koichi Hattori, Tokyo (JP)
Assigned to MAZDA MOTOR CORPORATION, Hiroshima (JP); and NIPPON STEEL Chemical & Material Co., Ltd., Tokyo (JP)
Filed by MAZDA MOTOR CORPORATION, Hiroshima (JP); and NIPPON STEEL Chemical & Material Co., Ltd., Tokyo (JP)
Filed on Jan. 4, 2022, as Appl. No. 17/568,702.
Claims priority of application No. 2021-045404 (JP), filed on Mar. 19, 2021.
Prior Publication US 2022/0297768 A1, Sep. 22, 2022
Int. Cl. B62D 29/04 (2006.01)
CPC B62D 29/04 (2013.01) 10 Claims
OG exemplary drawing
 
1. A frame which is made of a fiber reinforced composite and has a predetermined length and an enclosed cross-section defining a plurality of corners, 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 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
the tension wall part has a damping loss coefficient which is larger than a damping loss coefficient of the compressive wall part by 0.005 or more,
the compressive wall part includes a first fiber reinforced composite, and
the tension wall part includes a second fiber reinforced composite having a higher vibration damping capability than the first fiber reinforced composite.