Fatigue Crack Paths 2003

80

m m )

70

a (

1050

circumferential semielliptic c r s t

0

60

50

40

30

20

10

0

0

500

1000

1500

2000

2500

3000

3500

t(h)

Figure 2. Crack growth predictions for the top shaft.

2350

c r a c k a n g l e ( d e g r e e s )

20

15

0

10

20

30

40

50

60

70

crack depth

Figure 3. Predicted crack angle vs. depth for semi-circular crack in back shaft.