研究目的
To improve the adhesive joining properties of multi-material joints, e.g. FRP-FRP or FRP-metal-joints, through innovative laser pre-treatment processes.
研究成果
Laser pre-treatment significantly increases the peel resistance of adhesively bonded FRP joints compared to conventional methods, showing potential for serial application in automotive manufacturing. The method also allows for automation and in-line application, offering advantages in process reliability and environmental protection.
研究不足
The study focuses on thermoplastic FRP and two specific adhesive systems, limiting the generalizability to other materials. The laser pre-treatment parameters are varied but not exhaustively explored for all possible combinations.
1:Experimental Design and Method Selection:
The study involves the use of laser pre-treatment for surface preparation of FRP before adhesive bonding, comparing it with conventional methods like grinding and corundum blasting.
2:Sample Selection and Data Sources:
PA
3:6-TH-CF FRP specimens are used, conditioned to a uniform moisture content before pre-treatment. List of Experimental Equipment and Materials:
An IR laser for pre-treatment, two different adhesive systems (PUR-2K-PL and EP-2K), and FRP specimens.
4:Experimental Procedures and Operational Workflow:
Specimens are pre-treated with laser, grinding, or corundum blasting, then bonded with adhesives and tested for peel resistance.
5:Data Analysis Methods:
The cleavage peel test is used to measure peel resistance, and surface roughness is analyzed with laser scanning microscopy.
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