Comparative Metal Removal Rate analysis with and without the reinforcement on Epoxy Composite in CNC Machining using 25wt% Novel Oyster Shell Powder as the reinforcement Material

Abstract

Aim:This research is to comparative analysis on metal removal rate of plain epoxy composite with reinforced (25%) of oyster shell powder particles  novel composite using CNC machining. Materials and Methods: The samples of both the groups were fabricated by hand-layup technique.Experiments conducted for two groups, Group1 samples were prepared by using plain epoxy composite mixed with oyster shells of (25%). Group2 samples were prepared by using plain epoxy composite without oyster shells. A total of 16 samples were machined in each group. G-power calculated and pre-test power is 80% mean value and standard deviation are 0.5 and 0.1 for without filler and 0.2 and 0.06 for filler respectively. Statistical analysis was performed using the SPSS Statistical tool. Results: From the obtained values, group 1 has a high material removal rate when compared to  group 2. The SPSS software used for independent T test values show that the obtained mean significance was 0.035 (P<0.05). Conclusion: Within the limitations of this study, the 25 wt % oyster shell powder reinforced composite has better material removal rate than the plain epoxy composite with the mean value of 2.15350 mm³/min and 1.71400 mm³/min.