Reinforced Structural Element Bonding for Vehicle Load Capacity
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Solution Overview
Problem
Existing reinforced structural elements in vehicles face challenges in achieving high mechanical load-bearing capacity due to limited attachment areas of reinforcement elements, irregular cavity shapes, and difficulties in sealing and reinforcing cavities effectively.
Innovation Solution
A system comprising a structural element with a first and second metal sheet, where the reinforcement element is glued over a large area, particularly at joints, with additional connection surfaces and adhesives having low expansion rates to enhance mechanical resilience and adaptability to the structural element's shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reinforcement element is bonded to the structural element using conventional methods, then the structural element gains some reinforcement, but the mechanical load-bearing capacity is limited due to restricted attachment area
Solution Approach 1:
The reinforcement element extends into the cavity space (third dimension) rather than only attaching to the outer surface. By bonding to both outer and inner surfaces of the metal sheets, the attachment area is effectively doubled, transforming a 2D surface problem into a 3D volumetric solution that utilizes the cavity space for enhanced mechanical capacity
Solution Approach 2:
The reinforcement element is nested within the cavity formed by the metal sheets, utilizing the existing structural space. This nested configuration allows the reinforcement element to be surrounded by the structural element while maintaining maximum bonding surface area through contact with both inner and outer surfaces
2Weight of moving object
If the structural element uses cavities for lightweight construction, then the weight is reduced, but the mechanical strength and stability deteriorate
Solution Approach 1:
The system combines the metal sheets forming the cavity structure with a reinforcement element bonded to both inner and outer surfaces, creating a composite structural system. This composite construction maintains the lightweight advantage of the cavitied metal sheets while adding the strength contribution of the reinforcement element attached at multiple surfaces
Solution Approach 2:
The reinforcement element utilizes the cavity depth (third dimension) to create a distributed bonding system across multiple surfaces. This dimensional approach allows the structure to maintain hollow lightweight geometry while achieving enhanced strength through multi-surface attachment of the reinforcement
3Quantity of substance
If adhesive with high expansion rate is used to bond the reinforcement element, then the adhesive fills gaps effectively, but the mechanical stability of the joint deteriorates
Solution Approach 1:
The adhesive's expansion parameter is controlled by selecting materials with low expansion rates. This parameter change ensures that the adhesive maintains dimensional stability and mechanical properties after curing, while still providing sufficient flow to wet and bond to both inner and outer surfaces of the metal sheets
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
This approach significantly increases the mechanical load-bearing capacity of the reinforced structural element by maximizing the connection surface area and maintaining mechanical stability, while also improving sealing and noise reduction.
Implementation Method 1
the first and second portions of the laminations are bonded to the reinforcing element by an adhesive in the region of the first and second joints
Data Source
Figure 1a~1b
Figure 2~3
Figure 4a~4b
AI summary
A system for a reinforced structural element of a motor vehicle comprises a structural element, a reinforcing element, and an adhesive. The structural element has a first sheet and a second sheet, each forming three areas between two joining points. The reinforcing element is bonded to two pairs of opposing areas of the sheets.