PSI - Issue 18

Ivica Čamagić et al. / Procedia Structural Integrity 18 (2019) 385 – 390 Author name / Structural Integrity Procedia 00 (2018) 000–000

388

4

Table 5. Remaining exploitation period-crack in the PM

Initial crack length a 0 , mm

Critical crack length, a c , mm

Assumed crack length, a , m

Number of cycles,  N

Geometry term, Y

Stress range,  , MPa

Load case

5.58 6.01 6.45 6.91 5.58 6.01 6.45 6.91

0.01 0.02 0.03 0.01 0.02 0.03 0.041 0.041

160641

46618 20868 10767

I

211

5

41

14149448 4106189 1838105

II

46

5

41

948389

* Applies in the case of initial crack length of 5 mm. In the case of a crack in the PM: C = 1.52  10-10. m = 2.94

Table 6. Remaining exploitation period-crack in the PM

Critical crack length, a c , mm

Assumed crack length, a , m

Initial crack length a 0 , mm

Number of cycles,  N

Geometry term, Y

Stress range,  , MPa

Load case

I

5.58 6.01 6.21 6.41 5.58 6.01 6.21 6.41

0.01 0.02

20521

9622 7421 6329

211

5

29

0.025 0.029

II

0.01 0.02

318383 149276 115128

46

5

29

0.025 0.029

98199

* Applies in the case of initial crack length of 5 mm. In the case of a crack in the PM: C = 1.48  10-8. m = 1.80

Table 7. Remaining exploitation period-crack in the WM

Critical crack length, ac, mm

Initial crack length a0, mm

Assumed crack length, a, m

Number of cycles,  N

Geometry term, Y

Stress range,  , MPa

Load case

I

6.01 6.45 6.88 7.21 7.65 7.81 6.01 6.45 6.88 7.21 7.65 7.81

0.02 0.03 0.04 0.05 0.06 0.02 0.03 0.04 0.05 0.06

196096

98731 58520 39320 26957 23834

211

5

63.5

0.0635

II

8972132 4517323 2677509 1799030 1233369 1090506

46

5

63.5

0.0635

* Applies in the case of initial crack length of 5 mm. In the case of a crack in the WM: C = 1.26  10-9. m = 2.51