Vehicle Body Structure, And Method For Designing Vehicle Body Structure

Abstract: A vehicle body 1 includes: a center pillar 4 that is disposed along the vertical direction Z; and a side sill 5 that is connected to the center pillar 4 and is disposed along the longitudinal direction X. The side sill 5 has a closed cross-sectional shape including: an outer surface 153a that is disposed in an orientation along the vertical direction Z and faces outward in the vehicle width direction Y; a lower surface 154a that is disposed below the outer surface 153a and has a ground-facing orientation; and a lower flange 155 that protrudes downward from the lower surface 154a. The center pillar 4 includes an overlapping portion 22 that is disposed at the site of connection with the side sill 5 so as to cover the outer surface of the side sill 5. A lower end 224b of the overlapping portion 22 is disposed along the lower surface 154a of the side sill 5.

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