研究目的
Investigating the performance of the 1080 nm fiber laser drilling of a carbon fiber/epoxy composite in CW mode and in ms pulse modes with an experiment and with a numerical simulation.
研究成果
The ms pulse laser mode with a high peak power density and low duty cycle was found to be useful for reducing drilling time, HAZ, and laser energy consumption. Increasing laser pulse energy and decreasing pulse duration and duty cycle could improve laser processing efficiency.
研究不足
The study focused on specific laser parameters and CFRP materials, and the numerical model simplified some physical processes. The influence of internal gas pressure on laser drilling was not fully considered in the numerical simulation.
1：Experimental Design and Method Selection:
The study involved an experiment and a numerical simulation to investigate the NIR laser drilling of CFRP in CW and ms pulse modes.
2：Sample Selection and Data Sources:
CFRP panels made from five plies of carbon fiber cloth (T300) encapsulated in an epoxy matrix were used.
3：List of Experimental Equipment and Materials:
A fiber optic-delivered 1000 W laser emitting at 1080 nm wavelength was used, along with a two-axis translation stage and a lens with a 250 mm focal length.
4：Experimental Procedures and Operational Workflow:
The laser beam was focused on the specimen surface, and the laser source could operate in different modes of CW and ms pulses.
5：Data Analysis Methods:
The relationships between laser parameters and drilling outcomes were analyzed, and numerical simulations were conducted to predict temperature fields and internal gas pressure.
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