Side Sill Reinforcement Layout to Prevent Peeling in Side Collisions
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Solution Overview
Problem
Conventional side sill structures in vehicles struggle to efficiently absorb and transmit side collision loads due to deformation and peeling, which compromises the safety and smoothness of traffic.
Innovation Solution
A side sill structure with a wavy-shaped first reinforcing member and a second reinforcing member arranged below the first member, which abut against each other to prevent peeling and deformation during a side collision, enhancing load transmission to the vehicle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a wavy-shaped reinforcing member is arranged in the closed cross section of the side sill, then the absorption performance for load (1) is improved, but the absorption performance for load (2) cannot be improved and the side sill may peel or deform
Solution Approach 1:
The reinforcing member is divided into two separate components: a first reinforcing member with a wavy cross-sectional shape and a second reinforcing member with a substantially U-shaped cross section. This segmentation allows each component to perform its specialized function - the wavy first member absorbs load (1) while the U-shaped second member prevents peeling and deformation from load (2), resolving the contradiction between improving one type of load absorption without compromising the other.
Solution Approach 2:
The patent combines two different reinforcing member designs into a single integrated structure within the closed cross section. The first reinforcing member (wavy shape) and second reinforcing member (U-shaped) work together to simultaneously address both load types, achieving both improved absorption performance for load (1) and improved absorption performance for load (2) that the conventional single reinforcing member could not achieve.
2Strength
If the cross-sectional shape of the side sill is deformed or the side sill is peeled off, then it becomes difficult to efficiently absorb the side collision load and transmit the load to the vehicle body side
Solution Approach 1:
The second reinforcing member with the substantially U-shaped cross section is pre-installed in the closed cross section to provide preventive support against peeling and deformation. This beforehand cushioning structure ensures that when load (2) is applied, the side sill is already protected from peeling and cross-sectional deformation, maintaining both load absorption efficiency and cross-sectional shape stability.
Solution Approach 2:
The patent uses a composite reinforcing structure combining two different geometric shapes (wavy and U-shaped) within the same closed cross section. This composite approach creates a synergistic effect where the wavy first reinforcing member provides flexibility for load (1) absorption while the rigid U-shaped second reinforcing member provides structural stability to prevent peeling and deformation from load (2), thus maintaining both strength and stability simultaneously.
Data Source
AI summary
A side sill structure for a vehicle is provided. A side sill includes an inner panel, an outer panel, and a reinforcing member. The reinforcing member is arranged in a closed cross section formed by joining the inner panel and the outer panel. The reinforcing member includes a first reinforcing member arranged on an upper side in the side sill and a second reinforcing member arranged below the first reinforcing member.