Car Body Panel Structure for Stress Relief at Welded Connections
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Solution Overview
Problem
The existing car body panel structures are prone to stress concentration and damage due to welding-bonded parts under load input, leading to potential cracking and peeling, especially when subjected to external forces and uneven road surfaces.
Innovation Solution
A car body panel structure with a stress relieving part disposed between connecting sides for bonding with frame components, which disperses stress and prevents concentration, thereby enhancing rigidity and durability by altering the panel shape and simplifying manufacturing through a pressing operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding-bonded parts are used to connect car body panel and frame components, then connection strength is improved, but stress concentration and cracking occur under load
Solution Approach 1:
The connecting side is divided into multiple segments with reinforcing components (ridges) arranged along the connecting side. These ridges segment the stress distribution, preventing stress concentration at any single welding spot and reducing the likelihood of cracking and peeling under load.
Solution Approach 2:
Reinforcing components (ridges) are locally added to specific positions along the connecting side where stress concentration is most likely to occur. This local reinforcement strengthens the welding-bonded parts without adding unnecessary weight or complexity to the entire car body panel structure.
2Reliability
If reinforcing components are added to suspension tower, then cracking of welding-bonded parts is suppressed, but stress concentration on car body panel remains under thrust load
Solution Approach 1:
The solution merges the reinforcement function into the car body panel itself by adding ridges directly to the connecting side of the panel. This integrates the reinforcing function into the panel structure, allowing it to withstand thrust loads and torque without transferring excessive stress to the welding-bonded parts.
3Reliability
If complex reinforcing structures are added to car body panel, then stress concentration is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The reinforcing components are designed as ridges with curved or arc-shaped cross-sections that extend along the connecting side. These curved ridges effectively distribute stress while maintaining a relatively simple structure that can be integrated into the car body panel manufacturing process without excessive complexity.
Solution Approach 2:
The ridges serve multiple functions: they reinforce the connecting side, distribute stress concentration, and can be integrated into the existing car body panel forming process. This multi-functionality reduces the need for additional separate reinforcing components, thereby controlling manufacturing complexity.
Data Source
AI summary
The disclosure provides a car body panel structure. The car body panel structure includes a stress relieving part disposed on the car body panel and located between multiple connecting sides for connecting the car body panel and the frame component.