Flat Glass Connector Cut-Out Layout for Pull-Off Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing flexible electrical connectors for vehicle glazings suffer from low pull resistance due to asymmetric tensile stress on the adhesion area, leading to peeling and detachment of the connector during mounting or vehicle lifetime.
Innovation Solution
A flat electrical connector design with dedicated cut-outs that generate symmetric tensile stress on the adhesion area when subjected to a pull-off tensile force, ensuring higher resistance to pulling forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional flat connector design is used, then the connector can be easily manufactured and installed, but the adhesion area generates asymmetric tensile stress under pulling force, leading to peeling and low pull resistance
Solution Approach 1:
The patent applies asymmetry by introducing a cut-out in the adhesion area that is positioned asymmetrically relative to the connector centerline. This asymmetric geometry creates a counterbalancing moment that compensates for the asymmetric stress distribution, transforming the stress pattern from peeling (asymmetric) to symmetric tensile stress, thereby improving pull resistance
Solution Approach 2:
The adhesion area is segmented by introducing a cut-out that divides it into distinct regions. This segmentation allows the stress to be distributed across multiple zones rather than concentrated in one area, preventing peeling and enhancing overall adhesion strength under pulling forces
2Strength
If the connector adhesion area is increased to improve pull resistance, then more material is required and manufacturing complexity increases, but asymmetric stress still causes peeling
Solution Approach 1:
The cut-out creates local variations in the adhesion area geometry, concentrating adhesion material in specific high-stress regions while reducing or eliminating material in low-stress areas. This local optimization ensures adequate adhesion strength with reduced overall material quantity
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 connector design effectively eliminates peeling effects and enhances the adhesion strength, providing high resistance to pull-off tensile forces and ensuring a secure connection over time.
Implementation Method 1
an adhesion material (conductive glue or solder alloy) to connect mechanically and electrically the connector to the conductive structure provided on the glass substrate
Implementation Method 2
a solder alloy) to connect mechanically and electrically the connector to the conductive structure provided on the glass substrate glass
Data Source
AI summary
A flat plate connector including a glass substrate, a conductive silver printing, an adhesion material for electrical connection, an insulated film, a conductive metal strip, and an additional adhesion tape. The flat connector having a dedicated cut-out, where the flat connector before mechanical and electrical bounding with the adhesion material can be fixed with a tape which, depending on its type, can also enhance pull-off resistance and ageing tests. The area is then defined as the surface where the connector adheres to the glass, including the different adhesion materials. The dedicated cut is made in the flat connector to generate a symmetric tensile stress on this adhesion area when the connector is submitted to a pull-off tensile force, the symmetry axis being defined by this pull force axis.