Composite Material Bonding via Laser Fluffing and Dielectric Heating
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Solution Overview
Problem
Existing methods for bonding composite materials with bonding agents often result in deformation of the composite materials due to dielectric heating, which compromises the bonding strength.
Innovation Solution
A method involving laser irradiation to expose and fluff the reinforcing base material on the surface of composite materials, allowing for improved bonding with a bonding agent while preventing deformation, by increasing the bonding area and utilizing an anchor effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If dielectric heating is used to melt the bonding agent for bonding composite materials, then bonding strength is improved, but the composite materials may be deformed
Solution Approach 1:
A metal mesh is introduced as an intermediary component between the bonding agent and the composite material. The metal mesh serves as a heating medium that absorbs dielectric heating energy and transfers it to the bonding agent, enabling the bonding agent to melt and bond effectively without directly heating the composite material to deformation-causing temperatures
Solution Approach 2:
The invention changes the heating parameters by using a metal mesh with specific dielectric properties and thermal conductivity. The mesh structure and material composition are optimized to control the distribution and intensity of heating, ensuring the bonding agent reaches melting temperature while the composite material remains below deformation temperature
2Area of stationary object
If the surface of composite material is modified to improve bonding, then bonding area is increased, but the processing complexity increases
Solution Approach 1:
The metal mesh is pre-embedded within the bonding agent before the bonding process. This preliminary arrangement ensures that when dielectric heating is applied, the heating is immediately and uniformly distributed throughout the bonding agent, eliminating the need for complex post-processing or additional surface modification steps
Solution Approach 2:
The bonding agent is formulated as a composite material containing metal mesh particles or a continuous metal mesh structure dispersed within the bonding matrix. This composite structure combines the adhesive properties of the bonding agent with the thermal and dielectric properties of the metal mesh, achieving both effective heating and strong bonding in a single material system
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
Enhances the bonding strength between composite materials and bonding agents, preventing deformation and improving the overall bonding process through increased surface area and anchor effects.
Implementation Method 1
a bonding position on the surface of a composite material, comprising a reinforcing base material impregnated with a resin and onto which a bonding agent is to be applied, is irradiated with a laser to cause the reinforcing base material to be exposed and fluffed
Implementation Method 2
a bonding method that uses a bonding agent in which is mixed a granular/fibrous dielectric heating medium that has dielectric heating properties, and that is capable of biting into a composite material by pressurization
Data Source
AI summary
A composite material is formed by irradiating a bonding position on a surface of the composite material with a laser to cause a reinforcing base member of the composite material, that is impregnated with a resin and onto which a bonding agent is applied, to be exposed and fluffed.