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

Table 6

ANOVA analysis for delamination exit.

Analysis of variance
Source	DF	Seq SS	Contribution	Adj SS	Adj MS	value	value
Model	13	0.058171	69.36%	0.058171	0.004475	5.05	0
Linear	4	0.023373	27.87%	0.024854	0.006214	7.01	0
Drill bit	1	0.00524	6.25%	0.004373	0.004373	4.94	0.034
Feed	1	0.012731	15.18%	0.016748	0.016748	18.9	0
Square	3	0.016344	19.49%	0.01552	0.005173	5.84	0.003
Feed  feed	1	0.015351	18.30%	0.012999	0.012999	14.67	0.001
2-way interaction	6	0.018454	22.01%	0.018454	0.003076	3.47	0.01
Thickness  feed	1	0.017181	20.49%	0.017772	0.017772	20.06	0
Error	29	0.025692	30.64%	0.025692	0.000886
Total	42	0.083863	100.00%
S	R-sq	R-sq (adj)	PRESS	R-sq (pred)
0.0297645	69.36%	55.63%	0.0577628	31.12%