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TITLE : EXPERIMENTAL INVESTIGATION ON DRILLING OF GLASS FIBRE REINFORCED PLASTIC (GFRP) COMPOSITES  
ABSTRACT :

The applications of Glass Fibre Reinforced Plastic (GFRP) composite materials are very attractive due to their superior properties such as high specific strength and specific stiffness. These materials are most important and economic alternative to Engineering materials. The main objective of this work is to evaluate the performance characteristics of drilling Glass Fibre Reinforced Plastic composites. The experiments are conducted for a full factorial design on this GFRP laminates using helical flute straight shank drill and 'Brad and Spur' drill. The control factors considered during drilling are feed rate and cutting speed. The performances of drilling process are analyzed in terms of thrust force, torque,delamination and specific cutting pressure. The effects of control factors on the drilling performances are investigated in this study. The result shows that thrust force and torque increased with feed rate, due to their increasing in shear area. Also the delamination factors (peel up & push out) increased with increase in thrust force. Specific cutting pressure during drilling shows opposite trend to that of thrust force and torque.

Keywords: GFRP, drilling, thrust force, torque, delamination
 
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