A comparative study on surface roughness of glass/kapok fiber reinforced epoxy composite with and without novel coconut shell powder

The purpose of this experiment is to determine the surface roughness of glass/kapok fibre composites that contain new coconut shell powder and those that do not contain additional powder. Methodologies and Instruments for Research: The research was divided into two distinct areas. There were twenty samples that were employed as part of the experimental group. These samples were composites made of glass and Kapok fibres that were reinforced with a special coconut shell powder that was twenty percent. A control group consisting of twenty samples is an epoxy composite constructed of glass and Kapok fibres. This group is designated as the control group. The total number of participants included in the sample is forty. In order to estimate the appropriate size of this sample, we utilised the Gpower calculator, setting the significance level for each group at 0.05 and utilising an 80 percent G power. In order to make the composite, the hand lay-up process, which is recognised by ASTM, was utilised. According to the findings of the study, the surface roughness of the Glass/Kapok fiber-reinforced epoxy composite with 20 percent new coconut shell powder is 7.153 µm. This is in contrast to the surface roughness of the Glass/Kapok fiber-reinforced composite without the filler, which was 7.515 µm. There is a statistically significant difference between the two groups, as indicated by the statistics (p