Rear Side Body Structure with Bonded Reinforcing Member
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Solution Overview
Problem
Conventional vehicle body structures are inadequate in withstanding enhanced side crash conditions, experiencing excessive deformation and inefficient load distribution, particularly at the rear door and wheel arch areas, due to insufficient connectivity between the side sill outer panel and quarter panel.
Innovation Solution
A rear side body structure is designed with a side sill outer panel, a quarter inner panel, and reinforcing members that enhance longitudinal and transverse connectivity by forming a multi-way load path, distributing impact loads effectively and increasing the rigidity of the vehicle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the conventional vehicle body structure is used, then the manufacturing cost is low and the structure is simple, but the deformation of the vehicle body is excessive under enhanced side crash conditions
Solution Approach 1:
The vehicle body structure is segmented into multiple functional components: side sill outer panel, quarter inner panel, and reinforcing members positioned at specific locations. This segmentation allows each component to perform its specific function in the load path, improving crash resistance without requiring a complete structural redesign.
Solution Approach 2:
Reinforcing members are strategically positioned at the coupling portion between the side sill outer panel and quarter inner panel, where the most critical stress concentration occurs during side crashes. This local reinforcement approach improves crash resistance at the weakest point without increasing the complexity of the entire vehicle body structure.
2Strength
If the conventional vehicle body structure is used, then the manufacturing cost is low, but the load distribution is inefficient and deformation is excessive
Solution Approach 1:
The reinforcing members are pre-positioned at the coupling portion between panels during the manufacturing process, establishing the optimal load distribution path before the vehicle undergoes crash conditions. This preliminary structural preparation ensures efficient load transfer from the side sill outer panel through the quarter inner panel, improving load distribution efficiency without complicating the manufacturing process.
3Stability of the object's composition
If the connectivity between side sill outer panel and quarter panel is insufficient, then the manufacturing cost is low, but the deformation at rear door and wheel arch areas is excessive
Solution Approach 1:
Reinforcing members serve as intermediary elements that connect the side sill outer panel and the quarter inner panel at their coupling portion. These intermediaries transfer and distribute loads between the two panels, improving panel connectivity and reducing deformation at critical areas such as the rear door and wheel arch, without requiring a complete structural redesign.
Data Source
AI summary
The rear side body structure includes: a side sill outer panel forming a lower part of a side surface of a vehicle body, extending along a front-to-rear longitudinal direction of a vehicle, and including a bonding surface part on a rear end part thereof; a quarter inner panel connected to the side sill outer panel and forming a rear side surface of the vehicle body located at a rear of a rear door; and a first reinforcing member coupled to the side sill outer panel and to the quarter inner panel, and configured to cover a coupling portion between the side sill outer panel and the quarter inner panel, wherein the bonding surface part protrudes rearward and is bonded to a surface of the quarter inner panel.