研究目的
To study different laser drilling/cutting parameters to achieve minimum surface roughness, heat-affected zone, taper angle, and maximum tensile strength in laser-drilled GFRP laminates, and compare with conventional drilling.
研究成果
Optimum laser drilling parameters (laser intensity 2.04 W/cm2, cutting speed 8 mm/s, gas pressure 4 bar) yield higher tensile strength and lower surface roughness compared to conventional drilling. Laser drilling is a suitable alternative for thin GFRP laminates, with applications in industries like aircraft part manufacturing.
研究不足
The study is specific to the type of GFRP composite used; results may not be generalizable to other composite types. Potential areas for optimization include extending to other materials and thicknesses.
1:Experimental Design and Method Selection:
Full factorial design of experiments (DOE) with three parameters (laser intensity, cutting speed, gas pressure) at three levels each, using ANOVA for statistical analysis.
2:Sample Selection and Data Sources:
GFRP laminate samples (
3:2 mm thick, plain weave E-glass fibers, epoxy resin) manufactured by hand layup process, with void content measured. List of Experimental Equipment and Materials:
CO2 laser source, argon assist gas, SEM for imaging, Elcometer 224 Digital Surface roughness tester, Instron Type 4208 universal testing machine, CNC machining center for conventional drilling.
4:Experimental Procedures and Operational Workflow:
Laser drilling with trepanning method, conventional drilling with brad and spur drill bit, tensile tests according to ASTM 3039M, surface roughness and HAZ measurements.
5:Data Analysis Methods:
ANOVA, regression modeling using Minitab 17 software, multi-response optimization.
独家科研数据包,助您复现前沿成果,加速创新突破
获取完整内容