Fiber reinforced polymer composites are used in many engineering applications
because of their low strength to weight ratio. Delamination is one of the major problems in
manufacturing of the polymer composites. In this work, the delamination of acid treated basalt
fiber reinforced composites was studied through drilling operation. Basalt fiber reinforced
composites is prepared by using hand layup techniques with unsaturated polyester. Taguchi
design of experiment was used to investigate the effects of drilling parameters such as spindle
speed [2500, 2750, 3000 rpm], feed rate (0.2, 0.4, 0.6 mm/rev) and point angle (90 œ, 118 œ,
135 œ). A series of experiments based on L9 orthogonal arrays are conducted using CNC
machine and resulting delamination factor was determined. It was observed that speed and
point angles are highly influencing parameters than feed rate for the delamination of the basalt
fiber reinforced polymer composites.
Keywords: basalt fiber; polymer composites; point angle; delamination; Taguchi method.
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