Research Article
An Investigation of Abrasive Water Jet Machining on Graphite/Glass/Epoxy Composite
Table 5
ANOVA for top and bottom kerf width.
| Source | DF | Top kerf width (TKW) | Bottom kerf width (BKW) | SS | MS | | % SS | SS | MS | | % SS |
| Pressure () | 2 | 0.07027 | 0.03514 | 14.08 | 24.72 | 0.04636 | 0.02318 | 9.14 | 19.68 | Feed rate () | 2 | 0.03521 | 0.01761 | 7.05 | 12.38 | 0.03609 | 0.01805 | 7.12 | 15.31 | Abrasive concentration () | 2 | 0.00054 | 0.00027 | 0.11 | 0.19 | 0.00084 | 0.00042 | 0.17 | 0.35 | SOD () | 2 | 0.14829 | 0.07415 | 29.70 | 52.16 | 0.10588 | 0.05294 | 20.87 | 44.92 | | 4 | 0.00368 | 0.00092 | 0.37 | 1.29 | 0.01212 | 0.01215 | 1.19 | 5.14 | | 4 | 0.00481 | 0.00537 | 0.48 | 1.68 | 0.00618 | 0.00618 | 0.61 | 2.62 | | 4 | 0.02149 | 0.00121 | 1.40 | 7.55 | 0.01299 | 0.01299 | 1.28 | 5.15 | Error | 6 | 0.01497 | 0.00249 | ā | 5.13 | 0.01521 | 0.00253 | ā | 6.45 |
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DF: degree of freedom, MS: mean square, SS: sum of square, and % SS: percentage contribution.
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