研究目的
Investigating the influence of CO2 laser texturing on the adhesive bonding of CFRP laminates by analyzing the morphological changes and surface roughness parameters.
研究成果
The study demonstrated a strong correlation between laser texturing density and surface roughness, which in turn influenced the mechanical performance of bonded joints. A limit was identified beyond which further increases in surface roughness did not enhance joint performance, indicating the mechanical resistance of the adherends as the limiting factor.
研究不足
Densities of treatment higher than 35% led to overlapping dimples and potential thermal degradation. The study was limited to specific CFRP laminates and adhesive types.
1：Experimental Design and Method Selection:
CFRP laminates were manufactured and subjected to laser texturing with various densities defined by grid dimensions. Non-contact measurements were used to evaluate surface roughness.
2：Sample Selection and Data Sources:
Unidirectional carbon fibers/epoxy resin system laminates were used, cured via vacuum bagging technique.
3：List of Experimental Equipment and Materials:
GIOTTO CO2 25 W Sinrad/VM 2000 laser system, confocal microscope Leica MEB121, Conoscan 3000 non-contact measuring system.
4：Experimental Procedures and Operational Workflow:
Laser texturing with varying densities, followed by surface roughness measurements and ENF tests to evaluate mechanical performance.
5：Data Analysis Methods:
Surface roughness parameters (Sa and Sq) were calculated according to UNI EN ISO 25,178. Failure loads from ENF tests were correlated with surface roughness.
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