Vehicle Side Sill Rear Structure for Side Impact Resistance
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Solution Overview
Problem
Current vehicle frame structures are inadequate to withstand the enhanced side impact test conditions set by the Insurance Institute for Highway Safety (IIHS), leading to excessive deformation and failure to meet safety assessment criteria.
Innovation Solution
A side sill rear portion structure is enhanced with an outer panel, an outer reinforcement member, an inner panel, and an inner reinforcement member, where the reinforcement members are aligned to distribute impact loads effectively through vacant spaces, and a support element is integrated to improve load absorption and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the vehicle frame structure is strengthened to withstand enhanced side impact test conditions, then the ability to withstand side impacts is improved, but the device complexity increases
Solution Approach 1:
The side sill rear portion is divided into distinct functional components: outer panel, inner panel, outer reinforcement member, and inner reinforcement member. Each segment serves a specific structural purpose, allowing the complex strengthening requirement to be met through coordinated simple parts rather than a single complex structure.
Solution Approach 2:
The reinforcement members are positioned within the cavity formed by the outer and inner panels, creating a nested structure. The outer reinforcement member is coupled to the outer panel, while the inner reinforcement member is coupled to the inner panel, with both extending into the same spatial region to provide layered structural support.
2Strength
If reinforcement members are added to improve side impact resistance, then the strength is improved, but the weight increases
Solution Approach 1:
Reinforcement is applied locally at the side sill rear portion where side impacts occur, rather than strengthening the entire vehicle frame. The outer and inner reinforcement members are strategically positioned to provide maximum structural support at the impact zone while minimizing additional weight elsewhere in the vehicle.
Solution Approach 2:
The side sill rear portion employs a composite structure combining outer panel, inner panel, outer reinforcement member, and inner reinforcement member made from different materials optimized for their specific functions. This allows weight optimization by selecting materials with appropriate strength-to-weight ratios for each component.
Data Source
AI summary
An embodiment structure includes an outer panel of a side sill, an outer reinforcement member of a rear portion of the side sill coupled to an outer side of the outer panel of the side sill, an inner panel of the rear portion of the side sill coupled to an inner side of the outer panel of the side sill, and an inner reinforcement member of the rear portion of the side sill coupled to an outer side of the inner panel of the rear portion of the side sill and aligned with the outer reinforcement member of the rear portion of the side sill so that a portion of the inner reinforcement member of the rear portion of the side sill is connected to the outer reinforcement member of the rear portion of the side sill.