Vehicle Side Sill Structure With Split Reinforcements for Crash Loads
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Solution Overview
Problem
The existing side sill structures in vehicles face issues with peeling and deformation during side collisions due to inadequate load distribution and complex reinforcing member structures, which can lead to increased manufacturing costs.
Innovation Solution
A side sill structure with a first and second reinforcing member arranged side by side, facing each other, and joined to the inner and outer panels, respectively, to enhance load transmission efficiency and prevent peeling and deformation during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single complex reinforcing member is used, then the structure can provide some strength, but the manufacturing cost increases and the structure may not adequately cope with various side collision loads
Solution Approach 1:
The single complex reinforcing member is divided into multiple simple reinforcing members (first reinforcing member joined to inner panel, second reinforcing member joined to outer panel). This segmentation simplifies the structure of each individual member while maintaining or improving overall strength against side collision loads.
2Ease of manufacture
If foam adhesive is used to join the reinforcing member to panels, then assembly is simplified, but the adhesive may peel off when twisted loads are applied during side collisions
Solution Approach 1:
The single reinforcing member is segmented into multiple members positioned at different locations within the closed section. This distribution of reinforcement reduces the twisting moment on each individual member and its adhesive joint, preventing peeling while maintaining assembly simplicity.
3Strength
If a single reinforcing member with complex structure is used, then some load distribution is achieved, but the manufacturing cost increases
Solution Approach 1:
The complex single reinforcing member is replaced by multiple simple reinforcing members that can be manufactured separately and joined to the panels. This segmentation reduces manufacturing complexity and cost while maintaining load distribution capability through the distributed arrangement of members.
4Device complexity
If the reinforcing member is positioned centrally, then the structure is simple, but it cannot effectively handle various side collision loads from different directions
Solution Approach 1:
Instead of a single central symmetric reinforcement, the solution uses multiple reinforcing members positioned asymmetrically at different locations within the closed section. This asymmetric distribution provides adaptability to handle side collision loads from various directions while maintaining reasonable structural simplicity.
Data Source
AI summary
A side sill of a vehicle includes an inner panel, an outer panel, and a reinforcing member arranged within a closed section formed by joining the inner panel and the outer panel. The reinforcing member includes a first reinforcing member joined to the inner panel and a second reinforcing member joined to the outer panel. The first reinforcing member and the second reinforcing member are arranged side by side so as to face each other in a vehicle width direction.