Reactive Multilayer Joining for Large Bonding Areas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional reactive composite joining methods face challenges when attempting to join components over large surface areas, as maintaining uniform and simultaneous heating becomes difficult, leading to potential poor bonding and increased requirements for pressure application.
Innovation Solution
The method involves using a plurality of substantially contiguous reactive composite material sheets connected by bridging materials that can convey an ignition reaction, along with structural support tabs and fusible material sheets, to ensure uniform heating and bonding across large dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional reactive composite joining methods are used to join components over large surface areas, then the bonding area is increased, but uniform and simultaneous heating becomes difficult to maintain
Solution Approach 1:
The bonding process is divided into multiple independent reaction zones, each with its own ignition point. Multiple smaller reactive composite material sections are distributed across the large bonding area, allowing each section to be ignited and heated simultaneously or in a controlled sequence, thereby maintaining heating uniformity across the entire large surface area.
Solution Approach 2:
Thermal bridges or conductive intermediaries are introduced between adjacent reactive composite material sections to ensure uniform heat distribution. These intermediaries facilitate thermal energy transfer from ignition points to surrounding areas, maintaining consistent heating across the large bonding surface.
2Area of stationary object
If conventional reactive composite joining methods are used for large surface areas, then the bonding area is increased, but bonding quality deteriorates due to non-uniform heating
Solution Approach 1:
The large bonding area is segmented into multiple controlled reaction zones, each capable of achieving uniform heating and high-quality bonding independently. This segmentation ensures that bonding quality is maintained across the entire large surface by preventing the degradation that occurs in conventional single-zone methods.
Solution Approach 2:
The ignition parameters are changed from a single ignition point to multiple ignition points distributed across the bonding area. This parameter change enables simultaneous heating of multiple zones, ensuring consistent bonding quality across the large surface area and eliminating the non-uniform heating that deteriorates bonding quality in conventional methods.
3Area of stationary object
If conventional reactive composite joining methods are used for large surface areas, then the bonding area is increased, but pressure application requirements increase
Solution Approach 1:
The pressure application is segmented and distributed across multiple localized zones corresponding to each reactive composite material section. This allows pressure to be applied more effectively to each segment, reducing the overall pressure burden while maintaining bonding quality across the large surface area.
Solution Approach 2:
The reactive composite material sections are pre-positioned and pre-compressed in their respective zones before ignition. This preliminary action ensures proper contact and pressure distribution across the large bonding area, reducing the need for excessive overall pressure application during the bonding process.
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 allows for the formation of strong and uniform bonds between components over large areas by ensuring simultaneous and uniform heating, minimizing thermal damage and achieving high-quality joints with reduced voids.
Implementation Method 1
The RCM and the fusible material are then disposed between the two components to be joined, and the RCM is ignited. A self-propagating reaction is initiated within the RCM which results in a rapid rise in temperature within the RCM. The heat released by the reaction melts the adjacent fusible material layers
Implementation Method 2
Each of the substantially contiguous RCM sheets is coupled to at least one adjacent RCM sheet by a bridging material capable of transferring an energetic reaction from one sheet to another
Data Source
AI summary
A method for joining component bodies of material over bonding regions of large dimensions by disposing a plurality of substantially contiguous sheets of reactive composite materials between the bodies and adjacent sheets of fusible material. The contiguous sheets of the reactive composite material are operatively connected by an ignitable bridging material so that an igniting reaction in one sheet will cause an igniting reaction in the other. An application of uniform pressure and an ignition of one or more of the contiguous sheets of reactive composite material causes an exothermic thermal reaction to propagate through the bonding region, fusing any adjacent sheets of fusible material and forming a bond between the component bodies.