Influence of Drilling Parameters on the Delamination and Surface Roughness of Insulative-Coated Glass/Carbon-Hybrid Composite

Table 4

ANOVA table for delamination factor.

At the entry				At the exit
Source	Degree of freedom	value	value	Degree of freedom	value	value
Model	15	47.75	0.001	6	13.56	0.001
Linear	6	20.90	0.001	6	13.56	0.001
Spindle speed ()	2	4.70	0.045	2	23.18	0.001
Feed rate ()	1	0.35	0.573	1	2.46	0.135
Coating thickness ()	3	38.55	0.001	3	10.86	0.001
2-way interactions	9	65.66	0.001	—	—	—
	6	91.53	0.001	—	—	—
	3	13.92	0.002	—	—	—
Error	8	—	—	17	—	—
Total	23	—	—	23	—	—
Standard deviation	0.0062452			0.0189956
-square	98.90%			82.72%
-square (adjusted)	96.82%			76.62%
-square (predicted)	90.06%			65.56%