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B-pillar Load Transfer Mechanism in Side Collision

Article of Honda R&D Technical Review Vol.34 No.1


Based on side collision testing that the Insurance Institute for Highway Safety in the United States has been conducting, a technology was created that can reduce the amount of B-pillar deformation and also generate a high load. In a side collision, it is necessary for the greater part of the load received from the barrier to be supported by the bending of the B-pillar. This was addressed by creating a new load path in the B-pillar. The new load path is able to support the lateral load input from the barrier as an axial load in a downward direction in the vehicle body. This increases the load from the initial time of collision and reduces bending deformation. A load transfer mechanism in the B-pillar cross-section was added for the axial load and this was realized by a load path to the side sill. The structure of the load transfer mechanism was decided through theoretical calculation and simulation. A prototype was fabricated with a load transfer mechanism in a mass-produced B-pillar. Drop tests with the prototype proved that the load generated on the B-pillar was doubled so that the amount of deformation could be reduced to one-fifth.


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Author (organization or company)

Atsushi HASEGAWA(Innovative Research Excellence)、Hitomi YAMADA(Innovative Research Excellence)、Ryotaro TAKEUCHI(Innovative Research Excellence)、Takayuki FUJII(Honda Motor Co., Ltd.)、Yumi SAITO(BENTELER Automotive K.K.)