Abstract
The aim of this research is to identify the optimum levels of leading laser cutting parameters for accomplishing precise cut geometry with better quality for cutting of newly developed Basalt-Glass-Kevlar 29 hybrid FRP composite laminate. The total of 42 experiments have been performed on a 2.34 mm thick laminate using a 250W pulsed Nd:YAG laser cutting system. Lamp current, pulse width, standoff distance, compressed air pressure, and cutting speed have been selected as variable laser cutting parameters. Thereafter, grey relational analysis approach has been adopted to single index optimization of top and bottom kerf deviation, simultaneously. These optimal solutions have been validated by comparing the results of confirmation experiments and found satisfactory improvement. Standoff distance has been observed as the most influencing parameter for both top and bottom kerf deviation.
Highlights
In recent years, hybrid fiber reinforced polymer (FRP) composite materials are gaining the attention of researchers due to improved mechanical, structural properties as compared to their individual's composites [1]
The optimum levels of laser cutting parameters have been identified by calculating the difference of maximum and minimum average grey relational grades (GRG) for each parameter
Grey relational analysis has been employed for the single index optimization of top and bottom kerf deviations
Summary
Hybrid fiber reinforced polymer (FRP) composite materials are gaining the attention of researchers due to improved mechanical, structural properties as compared to their individual's composites [1]. Uncut fibers, delamination, increased surface roughness, and reduced tool life are serious issues in the machining of FRP composite materials through conventional machining techniques like turning, drilling and milling etc. Shukla and Tambe [6] successfully performed AWJ cutting of Kevlar fiber reinforced polymer composites They have determined the quality of cut in terms of top kerf width, bottom kerf width and surface roughness. Though both AWJM and LBM processes have been found out to have several advantages for machining the composites, yet AWJM possesses some negative effects such as moisture absorption, delamination because of inadequate depth of cut
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