Optimization of Drilling Parameters in Sisal-Human Hair Hybrid Composite Using Grey Relational Analysis

Table 3

S/N ratio for peel up and push down delamination.

Ex. no.	Drill point angle (degree)	Speed (rpm)	Feed (mm/min)	Fd-entry	Fd-exit
1	105	1500	50	1.0007	1.0024
2	105	1500	75	1.0024	1.0038
3	105	1500	100	1.0047	1.0058
4	105	2000	50	1	1.0024
5	105	2000	75	1.0019	1.0036
6	105	2000	100	1.0044	1.0053
7	105	2500	50	1	1.002
8	105	2500	75	1.0019	1.0033
9	105	2500	100	1.0024	1.0037
10	118	1500	50	1.0013	1.7523
11	118	1500	75	1.0024	1.6981
12	118	1500	100	1.0048	1.5578
13	118	2000	50	1.0012	1.6571
14	118	2000	75	1.0023	1.5245
15	118	2000	100	1.0048	1.4677
16	118	2500	50	1.0011	1.14
17	118	2500	75	1.0023	1.2537
18	118	2500	100	1.0046	1.3134
19	135	1500	50	1.0007	1.0288
20	135	1500	75	1.0024	1.0414
21	135	1500	100	1.0047	1.122
22	135	2000	50	1.0001	1.0269
23	135	2000	75	1.0021	1.0396
24	135	2000	100	1.0045	1.0973
25	135	2500	50	1	1.0238
26	135	2500	75	1.002	1.038
27	135	2500	100	1.0024	1.0907