Vehicle Side Sill Interlocking Reinforcement for Shear Load Transfer
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Solution Overview
Problem
Conventional vehicle side sill structures face issues with load transmission inefficiency and shear deformation due to gaps between reinforcement members, leading to potential peeling and cross-sectional shape collapse during side impacts.
Innovation Solution
A vehicle side sill structure with a first reinforcement member having a concave part and a second reinforcement member that fits into this concave part, bonded to the inner and outer panels, respectively, to enhance load transmission and prevent peeling and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple reinforcement members are arranged in the longitudinal direction with gaps between them, then the structure is simpler and easier to manufacture, but the load transmission is insufficient and shear deformation occurs
Solution Approach 1:
The second reinforcement member is nested within the concave part of the first reinforcement member, creating an interlocking structure where the protrusion part of the second member fits into the concave part of the first member. This nesting arrangement enables continuous load transmission across the connection portion while maintaining structural simplicity and ease of manufacture.
2Device complexity
If reinforcement members are connected with gaps between them, then the device complexity is reduced, but the reinforcement members are prone to shear deformation
Solution Approach 1:
The connection portion features an asymmetric geometry where the first reinforcement member has a concave part and the second reinforcement member has a protrusion part that fits into it. This asymmetric interlocking design prevents relative shear movement between members while keeping the overall structure simple and avoiding complex connection mechanisms.
3Ease of manufacture
If a bonding flange is used to bond the inner and outer panels, then the manufacturing process is simplified, but the bonding flange may be peeled off or the cross-sectional shape may collapse under side impact load
Solution Approach 1:
The reinforcement members are strategically positioned at critical locations within the closed section, with the first reinforcement member bonded to the outer panel and the second reinforcement member bonded to the inner panel. This localized reinforcement at key stress points strengthens the bonding flange area and prevents peeling and collapse under side impact loads while maintaining the overall simplicity of the bonding process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure effectively suppresses peeling and deformation of the side sill, ensuring efficient load transmission to the vehicle body, thereby improving traffic safety and smoothness.
Implementation Method 1
The first reinforcement member includes a concave part concave to the outer side in the vehicle width direction, and the second reinforcement member is disposed so that at least a portion of the second reinforcement member enters the concave part
Data Source
AI summary
A side sill 3 includes an inner panel 12, an outer panel 13, and a reinforcement member 11 arranged in a closed section formed by bonding the inner panel 12 and the outer panel 13. The reinforcement member 11 includes a first reinforcement member 26 bonded to the outer panel 13 and a second reinforcement member 27 bonded to the inner panel 12. The first reinforcement member 26 includes a concave part 28. The second reinforcement member 27 is disposed so that at least a portion of the second reinforcement member enters the concave part 28.