Vehicle Pillar Assembly with Deformation-Activated Brace
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Solution Overview
Problem
There is a need to maintain the structural integrity of a vehicle frame without increasing its weight, which existing vehicle body structures have not adequately addressed.
Innovation Solution
A vehicle pillar assembly is designed with an inner and outer pillar panel, a roof side rail, and a brace, where the inner and outer panels form a closed box section with a vertically extending cavity, and the brace is positioned to contact the outer panel upon deformation, enhancing rigidity without increasing overall material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the material quantity of the pillar is increased to improve rigidity, then the pillar rigidity is improved, but the vehicle weight increases
Solution Approach 1:
The pillar is divided into inner and outer pillar panels that form a closed box section, with the brace segmented to contact only during deformation. This segmentation allows the structure to achieve high rigidity through geometric configuration rather than material quantity, resolving the contradiction between pillar rigidity and vehicle weight.
Solution Approach 2:
The brace is designed with a gap relative to the outer pillar panel, allowing it to be inactive during normal conditions and become active only during deformation events. This dynamic behavior enables the structure to provide enhanced rigidity when needed without the permanent weight penalty of a continuously engaged reinforcement structure.
2Strength
If a brace is added to enhance rigidity, then the structural strength is improved, but the device complexity increases
Solution Approach 1:
The brace is integrated with the inner pillar panel through rigid fixation, merging two components into a unified structural system. The brace includes a contact portion that integrates with the cavity formed by the inner and outer pillar panels, creating a coordinated deformation mechanism that enhances strength without proportionally increasing complexity.
Solution Approach 2:
The gap between the brace contact portion and outer pillar panel acts as an intermediary mechanism, allowing controlled interaction between components during deformation. This gap mediates the force transfer between the brace and outer panel, enabling the complex interaction to be managed through a simple geometric feature rather than complex mechanical connections.
Data Source
AI summary
An outer pillar panel is fixed to an inner pillar panel defining a vehicle pillar with a closed box cross section. A vertically extending cavity is defined between the inner and outer pillar panels. The outer pillar panel includes a first contact portion within the cavity. The roof side rail is rigidly fixed to the upper ends of the inner pillar panel and the outer pillar panel. The brace is fixed to the inner pillar panel within the cavity. The brace includes a second contact portion facing the first contact portion but is spaced apart therefrom by a predetermined gap with the inner and outer pillar panels in an undeformed state. The first contact portion contacts the second contact portion when an external force above a prescribed amount is applied to the vehicle body structure.