研究目的
To predict optimal process parameters for the laser transmission welding of polyethylene film to a polypropylene substrate, focusing on the effect of laser power, traverse speed, and spot size on measured peel force.
研究成果
The study successfully identified a consistent bond regime for laser transmission welding, producing peel forces between 0.1 N to 0.4 N through thermal activation of the adhesive. Optimal process parameters were effectively predicted using a multi-objective genetic algorithm, validated against experimental results.
研究不足
The study's effectiveness decreases with larger spot sizes, as the sensitivity of maximum temperature to laser power and traverse speed is marginalized by spot size.
1：Experimental Design and Method Selection:
The study involved a combination of experimental work and numerical simulations to predict optimal process parameters. A bespoke material handling rig was developed for laser transmission welding experiments.
2：Sample Selection and Data Sources:
A 600 mm wide, 75 μm thick polyethylene film was used with a
3：64 mm thick opaque isotactic polypropylene substrate. List of Experimental Equipment and Materials:
CO2 laser source (Fenix Flyer, Synrad, Inc.) with integrated scanning galvanometer, tensile tester (3340 Single Column Testing System, Instron Corp.), and bespoke translation peel testing accessory (Constant 90° Angle Peel Fixture, Instron Corp.).
4：Experimental Procedures and Operational Workflow:
The laser was traversed over the film and substrate to form a bond, followed by peel force measurement.
5：Data Analysis Methods:
A multi-objective genetic algorithm (MOGA) in ANSYS Workbench was used for process parameter prediction.
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