2c(mm)

40 MPa

80 MPa

120 MPa

K a p p 40 (MPa·m1/2)

K a p p 80 (MPa·m1/2)

K a p p 120 (MPa·m1/2)

A

4

3.38

6.23

9.53

B

8

4.63

8.58

13.83

C

12

5.52

10.49

17.18

D

16

6.24

12.23

20.21

E

20

6.89

13.77

23.00

F

24

7.52

15.30

25.66

G

28

8.11

16.77

28.27