Load Introduction Bonding Cavity for Fiber Composite Adhesive Injection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing load introduction devices for fiber composite materials face challenges in achieving defined adhesive bonding on vertical surfaces and efficient distribution of low-viscosity adhesives, particularly in creating a single-piece U-shaped cross-section enclosure that can surround fiber composite materials on three sides, while ensuring reproducible and high-quality adhesions with minimal material use.
Innovation Solution
A method involving a metallic load introduction device with a designed adhesive surface and cavity system, where the device is positioned relative to the fiber composite work piece to create a cavity for adhesive injection, using cutouts or boreholes to control adhesive expansion, and secured with external means to withstand injection pressures, allowing for precise positioning and adhesive distribution without permanent alteration, and employing a sealant to ensure the adhesive spreads freely without hindrance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is injected into a cavity to achieve complete filling, then the adhesion quality is improved, but the adhesive may overflow or require excessive material
Solution Approach 1:
The cavity is pre-formed with defined geometry and volume before adhesive injection, allowing precise control of adhesive distribution. The cavity boundaries are established in advance to prevent overflow and ensure complete filling without excess material.
Solution Approach 2:
The cavity volume and geometry are optimized to match the adhesive injection parameters, enabling complete cavity filling with controlled adhesive amounts. The cavity design parameters (volume, shape, location) are specifically tailored to the adhesive flow characteristics.
2Force
If a load introduction device encloses fiber composite material on multiple sides, then the force distribution is improved, but the device complexity increases
Solution Approach 1:
The load introduction device is divided into multiple functional segments (adhesive surfaces, cavity boundaries, injection access points) that can be independently designed and optimized. Each segment serves a specific function in force distribution while maintaining overall structural efficiency.
Solution Approach 2:
The load introduction device structure serves multiple functions simultaneously: it provides adhesive bonding surfaces, defines cavity geometry, enables injection access, and distributes forces. This multi-functionality reduces the need for additional components and simplifies the overall device design.
3Manufacturing precision
If the cavity is completely sealed for adhesive injection, then adhesive distribution is controlled, but injection pressure buildup may occur
Solution Approach 1:
The cavity sealing is implemented with local quality variations - completely sealed in regions requiring precise adhesive distribution, while incorporating controlled access points or pressure relief features in regions where pressure management is critical. This spatial differentiation of sealing quality optimizes both adhesive distribution and pressure control.
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 enables efficient, high-quality adhesive bonding with reduced material use, allowing for more even force distribution and lighter load introduction devices, while accommodating complex contours and longer curing times, and simplifies the adhesion process by avoiding limitations on adhesive spreading, resulting in increased efficiency and cost savings.
Implementation Method 1
a load introduction device having at least one adhesive surface... injection of adhesive at least at a second pressure in at least one second time period into the cavity... until the adhesive reaches an expansion, especially one pre-planned
Data Source
AI summary
A load introduction device and a method for adhesive bonding of a load introduction device for fiber composite materials is disclosed. A sealant, particularly a first adhesive is used in the creation of a cavity and in the creation of a secured arrangement for the injection of adhesive into the cavity.