Abstract
Glass fibre reinforced polyester composites (GRP) and hybrid nanoclay and glass fibre reinforced polyester nanocomposites (CGRP) are fabricated by vacuum assisted resin infusion technique. The optimum mechanical properties are obtained for CGRP with 3 wt.% nanoclay. Three types of drills (carbide twist drill D 5407060, HSS twist drill BS-328, and HSS end mill (4 flutes “N”-type end mill RH-helical flute)) of 6 mm diameters are used to drill holes on GRP and CGRP. Three different speeds (600, 852, and 1260 rpm) and two different feeds (0.045, 0.1 mm/rev) are selected as process parameters. The effect of process parameter on thrust force and delamination during drilling CGRP is analyzed for optimizing the machining parameters. The delamination factor is low for the optimum process parameter (feed = 0.1 mm/rev and speed 852 rpm). Microstructural analysis confirms that at higher feeds, delamination is low for CGRP drilled with carbide tools. In order to analyze the effect of nanoclay in CGRP on tool wear, 200 holes were drilled on CGRP samples with 3 wt.% nanoclay, and the tool wear is analyzed under optimized parametric condition. Tool wear is high in HSS twist drill compared with carbide drill. The presence of nanoclay also accelerates the tool wear.
Highlights
Thermoset unsaturated polyester properties are improved significantly by incorporation of nanoclay particles [1,2,3]
In continuation of this research, we found that the incorporation of nanoclay in polyester matrix of glass fibre reinforced polyester composites has improved its mechanical properties significantly [6]
The experimental results confirm that the presence of nanoclay in polyester matrix of hybrid clay and glass fibre reinforced polyester nanocomposites (CGRP) nanocomposites is influencing the thrust force developed during drilling
Summary
Thermoset unsaturated polyester properties are improved significantly by incorporation of nanoclay particles [1,2,3]. In continuation of this research, we found that the incorporation of nanoclay in polyester matrix of glass fibre reinforced polyester composites has improved its mechanical properties significantly [6] These composites may find potential application in domestic, structural, automotive, and aerospace industries as it may be a substitute for conventional glass fibre reinforced polyester composites. The presence of nanoclay in the polymer matrix may attribute to the rise in cutting forces, delamination, and tool wear Keeping this into consideration, in this current work, hybrid nanoclay and glass fibre reinforced polyester nanocomposites (CGRP) and conventional glass fibre reinforced polyester composites (GRP) are fabricated by vacuum assisted resin infusion technique. The optimum machining parameter for better machining and better tool life will be identified by this technical work
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