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Analysis and Optimization of Surface Roughness in GFRP Drilling Through Integration of Taguchi and Response Surface Methodology

Author Affiliations

  • 1Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal, INDIA
  • 2 Deptt. of Mechanical and Manufacturing, Deptt. of Humanities and social sciences, Manipal Institute of Technology, Manipal, INDIA

Res. J. Engineering Sci., Volume 2, Issue (5), Pages 24-29, May,26 (2013)


The purpose of this paper is to study the effect of process parameters such as spindle speed and feed rate, drill diameter and point angle, and material thickness on the surface roughness of the drilled hole in drilling of Glass Fibre Reinforced Polymer (GFRP) composite laminate using solid carbide drill bits. Full factorial Design of Experiments (DOE) has been adopted to estimate the number of runs and the combination of independent variables for each run. The data obtained from the experimentation was analyzed using Taguchi Method. The analysis indicate that material thickness is the main contributing parameter for the variation in the surface roughness of the drilled hole compared to other parameters and the least contributing parameter is spindle speed. The analysis results reveal that, except the spindle speed, the rise in the level of the other independent parameters increases the surface roughness. But as spindle speed increases, the surface roughness decreases. The correlation between thrust force and the surface roughness is also predicted. The optimum combination of process parameter settings has been found out using the integration of Taguchi method and Response Surface Methodology (RSM).


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