Preloaded Spring Reinforcement for Vehicle Body Panel Stiffening
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Solution Overview
Problem
Vehicle body panels, particularly those with complex curves and shapes, face deformation issues due to external pressures, and existing stiffening solutions like heat-cured materials and liquid applied materials often lead to delamination, corrosion, and VOC emissions.
Innovation Solution
A method and system using a preloaded elongated spring with anchors to provide outward force on body panels, utilizing materials like PET, HDPE, and metals, which are environmentally friendly and do not interfere with other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If thinner metal is used to lighten body panels, then fuel efficiency is improved, but the panel becomes easily deformed under pressure
Solution Approach 1:
The body panel is divided into multiple sections with varying thicknesses. Critical areas that require higher stiffness are reinforced with additional material, while non-critical areas maintain thinner gauge to reduce overall weight. This segmented approach optimizes the weight-strength tradeoff by applying material only where structurally necessary.
Solution Approach 2:
Different regions of the body panel are assigned different material properties and thicknesses based on their functional requirements. High-stress areas receive thicker or reinforced material, while low-stress areas use thinner material. This local differentiation allows the panel to achieve adequate strength throughout without uniformly increasing weight across the entire panel.
2Stability of the object's composition
If heat cured materials are applied to increase stiffness, then panel stability is improved, but the materials exhibit blistering, distortion, wrinkles, and delamination
Solution Approach 1:
Instead of applying heavy, complex heat-cured coating systems that are prone to defects, the invention uses a simpler, lighter material that replicates the essential stiffening function. This alternative material achieves the required panel stability without the blistering, distortion, and delamination issues associated with traditional heat-cured coatings.
Solution Approach 2:
The invention changes the material parameters by selecting a different class of stiffening material with superior adhesion properties and resistance to thermal and mechanical stress. This parameter change eliminates the blistering and delamination problems while maintaining or improving panel stiffness through improved material-performance relationships.
3Strength
If liquid applied materials are used for stiffening, then panel reinforcement is achieved, but delamination and VOC emissions occur
Solution Approach 1:
The invention addresses the harmful effects of liquid applied materials by using a material system that eliminates or significantly reduces VOC emissions while maintaining effective panel reinforcement. The new material converts the harmful liquid application process into a more environmentally benign solution that achieves the same structural benefit without the associated pollution and delamination issues.
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 counters 'oil canning' deformation and provides reliable stiffening without delamination or corrosion issues, improving panel stability and reducing VOC emissions.
Implementation Method 1
an elongated spring having a first end disposed at a first spring anchor and a second end disposed at a second spring anchor. The spring is preloaded when assembled to form an apex between the first end and the second end. The apex is disposed adjacent to the body panel to provide an outward force on the body panel.
Data Source
AI summary
A vehicle structure includes a body panel, a first spring anchor, a second spring anchor; and an elongated spring having a first end disposed at a first spring anchor and a second end disposed at a second spring anchor. The spring is preloaded when assembled to form an apex between the first end and the second end. The apex is disposed adjacent to the body panel to provide an outward force on the body panel.