Co-Cured Conductive Composite Interface for Low-Resistance Shielding
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Solution Overview
Problem
Current methods for creating electrically conductive composite systems face challenges in achieving low resistance electrical contact at interfaces between components, particularly due to non-conductive resins and vulnerability of gaskets, which affects shielding performance and corrosion resistance.
Innovation Solution
The approach involves co-curing a highly conductive, metal-braided or metal-knitted gasket directly into the composite surface, eliminating the need for adhesives and enhancing bonding strength, while also providing superior corrosion resistance and reducing gasket tear-off issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal-braided gasket is co-cured into the composite surface, then electrical conductivity and bonding strength are improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the gasket and composite structure into a single co-cured unit, integrating two previously separate components (gasket and composite laminate) into one manufacturing process. This merging eliminates the need for separate gasket installation steps while ensuring optimal electrical contact and structural bonding.
Solution Approach 2:
The gasket is positioned and prepared in advance within the composite layup before curing begins. This preliminary positioning ensures proper alignment and contact between the gasket and interface surfaces, allowing the electrical conductivity and bonding to be established during the initial curing process rather than requiring post-assembly adjustments.
2Strength
If resin is used in the composite system, then structural integrity is improved, but electrical conductivity at interfaces deteriorates
Solution Approach 1:
The patent applies different material properties to different regions: the bulk composite uses resin for structural integrity, while the gasket region uses metal-braided material with high electrical conductivity. This local differentiation allows the resin to provide overall structural strength while the metal gasket maintains electrical conductivity at critical interface surfaces.
Solution Approach 2:
The invention creates a composite structure combining resin-based composite laminates with metal-braided gasket material. This multi-material composite approach leverages the advantages of each material: resin provides structural integrity and corrosion resistance, while metal-braided gasket provides electrical conductivity and mechanical compliance at interfaces.
3Ease of manufacture
If traditional gasketing methods are used, then assembly is simplified, but gasket vulnerability to tearing increases
Solution Approach 1:
By co-curing the gasket with the composite structure, the patent eliminates separate gasket installation and secures the gasket permanently within the composite laminate. This merging prevents gasket tearing that would occur during separate handling and assembly operations, while the integrated structure maintains manufacturing efficiency through a single curing process.
4Reliability
If metal layers are exposed at interfaces, then electrical contact is improved, but corrosion resistance deteriorates
Solution Approach 1:
The patent uses metal-braided gasket material that provides electrical conductivity through its metal composition, while the surrounding resin-based composite laminate provides corrosion protection. This composite construction allows exposed metal surfaces to maintain electrical contact functionality while being protected from environmental corrosion by the encapsulating composite structure.
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 method creates a robust, highly conductive interface surface with reduced electromagnetic shielding leakage and improved corrosion protection, streamlining manufacturing by integrating the gasket into the composite layup process.
Implementation Method 1
co-curing a highly conductive, metal-braided (or metal-knitted) gasket directly into a composite surface
Implementation Method 2
highly electrically conductive and corrosion-resistant surface for a multi-component composite
Data Source
AI summary
A conductive composite structure has a conductive interface surface that enhances conductivity and provides corrosion protection by co-curing a metal-mesh gasket adjacent to a metal wire mesh layer in a multi-layer laminate structure. By co-curing metal-mesh gasket and metal wire mesh layers, gasket tear off and non-conductive resin face issues are eliminated. The conductive interface surface may be ablated to expose at least a portion of the metal-mesh gasket and create potential wire-to-wire contact points when complementary interface surfaces are brought together to create a highly conductive contact interface that eliminates or reduces electromagnetic shielding leakage within the conductive interface region.