| 摘要 |
The present invention relates to a B pillar lower reinforcement material having a stiffness adjustable hole which has an elongated hole to adjust the stiffness of the B pillar lower reinforcement material in order to transform a B pillar without getting damaged during a side collision. The B pillar lower reinforcement material having a stiffness adjustable hole according to the present invention is connected to the bottom of the B pillar in order to reinforce the strength of the B pillar. The B pillar lower reinforcement material (30) includes: a side wall part (31) which is primarily bent toward the inside of a vehicle at both ends of the B pillar lower reinforcement material; and a flange part (32) which reinforces the stiffness of a side flange (12) of a B pillar outer reinforce (10) extended to the front and back of the vehicle from the B pillar outer reinforce by being secondarily bent to the front and back of the vehicle from the end of the side wall part (31). A stiffness adjustable hole (33) of a slit type for preventing the side wall part (31) from pressing the side wall part of the B pillar outer reinforce (10) during a side collision is formed at the side wall part (31). |
