| 摘要 |
A front side member extending in the longitudinal direction of a vehicle is comprised of a kick up portion, and a cylindrical front side member body with an octagonal sectional form extending from the front end to the rear end in front of the kick up portion. The kick up portion and the front side member body are integrated together by joining an inner member and an outer member. The respective portions of the inner member and the outer member between the kick up portion and the front side member are concaved to be in contact with each other, and are welded together to form a joint. A first closed section is formed at the upper side of the joint, and a second closed section is formed at the lower side of the joint. The result realizes a vehicle body structure having a lightweight front side member with an improved impact resistance and a high energy absorbing efficiency.
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