Investigation of Drilling Parameters Using Grey Relational Analysis and Response Surface Methodology of Biaxial Glass Fibre Reinforced with Modified Epoxy Resin Composite

Table 5

ANOVA analysis for delamination entry.

Analysis of variance
Source	DF	Seq SS	Contribution	Adj SS	Adj MS	value	value
Model	13	0.03751	99.81%	0.03751	0.002885	530.76	0
Linear	4	0.021681	57.69%	0.007774	0.001944	357.52	0
Thickness	1	0.018327	48.77%	0.006198	0.006198	1140.17	0
Drill bit	1	0.000015	0.04%	0.000224	0.000224	41.22	0
Feed	1	0.003007	8.00%	0.000554	0.000554	101.93	0
Speed	1	0.000332	0.88%	0.000041	0.000041	7.61	0.016
Square	3	0.000468	1.25%	0.000359	0.00012	22.02	0
Drill bit  drill bit	1	0.000329	0.88%	0.000326	0.000326	59.93	0
Speed  speed	1	0	0.00%	0.000026	0.000026	4.78	0.048
2-way interaction	6	0.015362	40.88%	0.015362	0.00256	470.95	0
Thickness  drill bit	1	0.012946	34.45%	0.007243	0.007243	1332.37	0
Thickness  feed	1	0.000972	2.59%	0.00133	0.00133	244.62	0
Thickness  speed	1	0.000598	1.59%	0.000665	0.000665	122.39	0
Drill bit  feed	1	0.000773	2.06%	0.000477	0.000477	87.82	0
Feed  speed	1	0.00004	0.11%	0.00004	0.00004	7.36	0.018
Error	13	0.000071	0.19%	0.000071	0.000005
Total	26	0.037581	100.00%
S	R-sq	R-sq (adj)	PRESS	R-sq (pred)
0.0023316	99.81%	99.62%	0.0002890	99.23%