An Investigation of Abrasive Water Jet Machining on Graphite/Glass/Epoxy Composite

Table 4

Plan of experiment and measured output parameters.

Trial	Process parameters				Average response values
	Pressure (MPa)	Feed rate (mm/min)	Abrasive concentration (wt.%)	SOD (mm)	TKW (mm)	BKW (mm)
1	90	75	6	1	0.845	0.803
2	90	75	10	3	0.905	0.892
3	90	75	14	5	0.964	0.936
4	90	100	6	3	0.896	0.853
5	90	100	10	5	0.950	0.912
6	90	100	14	1	0.847	0.827
7	90	125	6	5	0.870	0.835
8	90	125	10	1	0.823	0.816
9	90	125	14	3	0.860	0.850
10	120	75	6	3	0.960	0.913
11	120	75	10	5	1.176	1.150
12	120	75	14	1	0.890	0.868
13	120	100	6	5	1.104	1.055
14	120	100	10	1	0.875	0.845
15	120	100	14	3	0.981	0.977
16	120	125	6	1	0.855	0.803
17	120	125	10	3	0.917	0.852
18	120	125	14	5	0.987	0.935
19	150	75	6	5	1.203	1.155
20	150	75	10	1	0.938	0.918
21	150	75	14	3	1.052	1.005
22	150	100	6	1	0.903	0.872
23	150	100	10	3	0.965	0.887
24	150	100	14	5	1.150	1.015
25	150	125	6	3	0.892	0.880
26	150	125	10	5	1.065	0.992
27	150	125	14	1	0.882	0.871