Vehicle Body Sillboard Force Transmission Element
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Solution Overview
Problem
In vehicle bodies, the B-pillar's reliance on a single load path during a side collision can lead to material failure at the upper flange connection of the bottom sillboard, resulting in adverse deformation behavior.
Innovation Solution
A second support profile and a force transmission element, such as a corrugated bulkhead, are integrated to provide an additional load path, reducing the load on the upper flange connection and allowing for torsional movement of the bottom sillboard, while maintaining high transverse rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the body pillar element is supported only on the upper flange connection of the bottom sillboard, then the structure is simple, but the upper flange connection is severely stressed and risks material failure
Solution Approach 1:
The support function is segmented into two separate support profiles: a first support profile supporting against the upper flange connection and a second support profile supporting against the sillboard outer wall between the flange connections. This segmentation distributes the collision forces across multiple support points, reducing the stress concentration on the upper flange connection while maintaining structural simplicity.
2Strength
If the bottom sillboard is made rigid to prevent deformation, then structural integrity is improved, but torsional movement is impaired and deformation behavior worsens
Solution Approach 1:
The force transmission element is designed with corrugated geometry, creating a structure that appears rigid externally but contains internal flexibility through the corrugations. This allows the element to transmit collision forces effectively while permitting controlled torsional movement of the bottom sillboard, achieving both structural integrity and acceptable deformation behavior.
Data Source
AI summary
A vehicle body includes a bottom sillboard, the inner and outer profile parts of which are joined together, as viewed in the vehicle transverse direction, at upper and lower flange connections, to which bottom sillboard a pillar base of a body pillar element is attached, which, in the event of a side collision is supported with a first support profile against the upper flange connection of the bottom sillboard, and with a second support profile against a sillboard outer wall between the two flange connections. According to the invention, a force transmission element is provided in the hollow space of the bottom sillboard. In the event of a side collision, the force transmission element provides an additional force path between the second support profile and a sillboard inner wall.