Vehicle Side Sill Partition Member Ridge Design
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Solution Overview
Problem
Current vehicle body side part structures fail to adequately improve the rigidity and load transmission performance of partition members during a side collision, as existing designs do not effectively distribute and resist the loads imposed on the side sill and pillars.
Innovation Solution
A vehicle body side part structure featuring a pillar extending along the vehicle body side surface, a side sill connected to the pillar, and a partition member within the side sill, which includes a side sill outer reinforcement and an inner member forming a closed sectional space. The partition member has a partition wall with a ridge extending from the side sill outer reinforcement to the inner member, connected to a joint flange, and a widening portion at the end of the ridge to enhance rigidity and load transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a partition member is provided in a side sill to transmit load from the lower outer corner portion, then the load transmission performance is improved, but the rigidity of the partition member is insufficient
Solution Approach 1:
The partition member is divided into multiple functional components: a partition wall for dividing the closed sectional space, a ridge extending from the side sill outer reinforcement to the inner member, and a joint flange for connection. This segmentation allows each component to perform its specific function optimally, with the ridge providing structural reinforcement and the joint flange ensuring rigid connection to the side sill inner member.
Solution Approach 2:
The ridge is strategically positioned to extend from the side sill outer reinforcement to the inner member, concentrating structural strength at the critical load transmission path. The widening portion at the end of the ridge close to the joint flange provides localized reinforcement where the load is most intensely applied, improving the rigidity precisely where needed during side collision.
2Strength
If the ridge shape is modified to improve load transmission performance, then the rigidity increases, but the manufacturing complexity increases
Solution Approach 1:
The ridge and the joint flange are merged into a single integrated component structure. The ridge extends continuously from the side sill outer reinforcement to connect with the joint flange, forming a unified load transmission path. This merging simplifies manufacturing compared to assembling separate ridge and flange components, while still providing the necessary structural reinforcement through the widening portion at the connection point.
Data Source
AI summary
A vehicle body side part structure for a vehicle includes a side sill connected to the lower part of a pillar, and a partition member provided within the side sill. The partition member includes a partition wall for dividing a closed sectional space of the side sill in the vehicle front-rear direction, and joint flange joined to the inner surface of a side sill inner member. The partition wall includes a ridge extending from a side of the side sill outer reinforcement to a side of the side sill inner member and connected to the joint flange. A widening portion is formed at an end of on the ridge close to the joint flange. This configuration makes it possible to improve the load transmission performance at the time of a side collision of the vehicle.