Structural member for car and car body fabricated using the member

• Main Authors: Doi, Hiroyuki, Motoyoshi, Takashi, Takachi, Tsutomu, Kawase, Masanobu, Yamada, Nobuyasu
• Format: Patent
• Language: English
• Published: 21.06.2005

b/a≦t/L≦A structural member usable for a car capable of demonstrating excellent flexural strength and absorbed energy performance and, moreover, capable of realizing weight reduction and is a structural member for a car being formed with a high-tensile steel pipe having a material property of not less than 1,400 MPa in tensile strength and not less than 5% in elongation. The structural member has a closed section structure which is provided as the configuration of the cross section perpendicular to the direction of the longitudinal axis. The cross-sectional configuration satisfies the following expression when a is defined as the maximum length of said cross-sectional configuration in the longitudinal direction, when b is defined as the maximum length thereof in the direction perpendicular to said direction, when L is defined as the circumferential length thereof, and when t is defined as the wall thickness of the steel pipe, 0.65≦0.75, 0.014≦0.020 and preferably, the structural member is disposed so that the longitudinal direction of the cross-sectional configuration of the structural member coincides with the direction of the collision of a car body when the structural member is attached to the car body.