Table 5 ANOVA of Kerf convergence ratio (Kt) for Fiber/Metal Hybrid Composites (H1, H2 and H3 laminates).

From: Effect of silicon carbide on kerf convergence and irregularity of the surface during abrasive water jet machining of fiber-metal hybrid composites

Kerf convergence ratio (Kt)

Hybrid Laminate (H1)

Hybrid Laminate (H2)

Hybrid Laminate (H3)

Source

SS

dof

MS

F-value

p-value

SS

dof

MS

F-value

p-value

SS

dof

MS

F-value

p-value

Model

1.88

9

0.2084

44.30

 < 0.0001

6.01

6

1.00

80.55

 < 0.0001

1.62

6

0.2702

64.59

 < 0.0001

A-Traverse feed velocity

0.5048

1

0.5048

107.31

 < 0.0001

3.82

1

3.82

307.48

 < 0.0001

0.0202

1

0.0202

4.83

0.0467

B- Abrasive discharge proportion

0.1635

1

0.1635

34.74

0.0002

1.58

1

1.58

127.35

 < 0.0001

0.1873

1

0.1873

44.77

 < 0.0001

C- Nozzle-to-substrate gap

0.0070

1

0.0070

1.48

0.0251

0.2112

1

0.2112

16.99

0.0012

0.7009

1

0.7009

167.53

 < 0.0001

AB

0.5447

1

0.5447

115.79

 < 0.0001

0.0452

1

0.0452

3.63

0.0791

0.5162

1

0.5162

123.38

 < 0.0001

AC

0.3601

1

0.3601

76.55

 < 0.0001

0.1989

1

0.1989

15.99

0.0015

0.1530

1

0.1530

36.56

0.0066

BC

0.0297

1

0.0297

6.32

0.0307

0.1474

1

0.1474

11.86

0.0044

0.0436

1

0.0436

10.43

 

Residual

0.0470

13

0.0047

  

0.1617

13

0.0124

  

0.0544

13

0.0042

  

Lack of Fit

0.0152

8

0.0030

0.4768

0.7822

0.0391

8

0.0049

0.1995

0.9776

0.0286

8

0.0036

0.6914

0.6944

Pure Error

0.0319

5

0.0064

  

0.1225

5

0.0245

  

0.0258

5

0.0052

  

Cor Total

1.92

19

   

6.17

19

   

1.68

19

   

R2

0.9755

0.9738

0.9675

Adj R2

0.9535

0.9617

0.9526

Pred R2

0.9085

0.9511

0.9379

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