Gusset Deformation Facilitating Part for Vehicle Rear Impact Load Management
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Solution Overview
Problem
The existing vehicle body structure faces challenges in effectively managing and reducing the impact load transmitted from the gusset to the extension during rear collisions, leading to potential structural stress and deformation issues.
Innovation Solution
Incorporating a deformation facilitating part on the gusset, specifically a bend part on the outer wall bent toward the extension, and ribs that facilitate efficient load transmission and absorption, along with a sub beam and stiffener to enhance structural integrity and impact management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gusset is provided between the bumper beam and the extension to transmit impact load, then the impact load can be transmitted from the bumper beam to the extension, but the impact load transmitted to the extension becomes too large causing structural stress and potential failure
Solution Approach 1:
The gusset is divided into multiple sections with different rigidity characteristics. The first gusset section (closer to bumper beam) has higher rigidity for efficient load transmission, while the second gusset section (closer to extension) has lower rigidity to reduce peak loads. This segmentation allows the gusset to transmit impact loads effectively while protecting the extension from excessive stress concentrations.
Solution Approach 2:
Different portions of the gusset are designed with different structural properties. The gusset transitions from a stiffer configuration near the bumper beam to a more flexible configuration near the extension. This local variation in quality enables the gusset to perform dual functions: transmitting loads efficiently from the impact zone while simultaneously reducing the magnitude of loads reaching the extension.
2Stability of the object's composition
If the gusset is made rigid to ensure stable connection between bumper beam and extension, then connection stability is improved, but the impact load absorbed by the gusset increases causing more load to be transmitted to the extension
Solution Approach 1:
The gusset is designed with dynamic characteristics that allow it to adapt its rigidity based on loading conditions. The varying cross-sectional geometry enables the gusset to exhibit different stiffness levels at different locations, creating a dynamic load management system that balances connection stability with impact load absorption. The structure remains stable during normal operation but allows controlled deformation during impact events.
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 solution effectively reduces the impact load transmitted to the extension, absorbs and distributes the load efficiently, preventing structural peeling and enhancing the vehicle's ability to manage rear collisions by allowing controlled deformation and reinforcing critical components.
Implementation Method 1
a deformation facilitating part is provided on a middle part of the gusset... It is possible to deform the gusset from the deformation facilitating part by the impact load that is input to the gusset. Accordingly, the impact load is absorbed by the gusset
Data Source
AI summary
A vehicle body rear part structure includes a bumper beam, an extension, and a gusset. The bumper beam extends in a vehicle width direction in a rear part of a vehicle body. The extension is provided for attaching the bumper beam to the vehicle body. The gusset is provided between the bumper beam and the extension and at an inner position in a vehicle width direction of the extension. A deformation facilitating part is provided on a middle part of the gusset.