Fatigue Crack Paths 2003

a)

b)

Figure 10. Photographs of cracked samples: a) sample 12A, b) sample 14B.

Five types of specimens were used (12A, 12B, 12C, 14A, 14B) in tests. The parame

ter specification for the Paris model is presented in Table 1 and of the present model in

Table 2.

Table 1. Parameter specification for Paris model.

No of sample

C

m

3.31

12A

6.19×10-7

3.55

12B

7.09 × 10-7

3.78

12C

6.65 × 10-7

5.21

14A

1.52 ×10-6

14B

8.66× 10-7

4.43

Table 2. Parameter specification for present model.

[ ] m M P a *IthK

[]mMPa *IcK

Noof sample A

n

p

d0 [mm]

12A 0.009

9

0.5

1.2

0.6

1.2

12B 0.013

12.5

12C 0.007

7

1

0.55

1.2

0.16

14A 0.024

7

0.6

1.35

14B 0.017

8

0.6

1.35