Table 5 Taguchi L16 orthogonal array for drilled PP and GFR/PP under different drilling conditions.

From: Comparison between bearing strengths of molded-in and machined holes of GFR/PP composites

Experiment no.

Weight fraction (%)

Spindle speed (r.p.m)

Feed rate (mm/min.)

Specimen code

1

0

1000

100

W1S1F1

2

0

2000

200

W1S2F2

3

0

3000

300

W1S3F3

4

0

4000

400

W1S4F4

5

10

1000

200

W2S1F2

6

10

2000

100

W2S2F1

7

10

3000

400

W2S3F4

8

10

4000

300

W2S4F3

9

20

1000

300

W3S1F3

10

20

2000

400

W3S2F4

11

20

3000

100

W3S3F1

12

20

4000

200

W3S4F2

13

30

1000

400

W4S1F4

14

30

2000

300

W4S2F3

15

30

3000

200

W4S3F2

16

30

4000

100

W4S4F1