PSI - Issue 48

Mersida Manjgo et al. / Procedia Structural Integrity 48 (2023) 155–160 Manjgo et al/ Structural Integrity Procedia 00 (2023) 000–000

158

4

Table 1. Remaining exploitation period - crack in the new BM

Load case

Geometric term Y

Allowable stress range  ,MPa

Assumed crack length, m

Critical crack length a c ,mm

Number of cycles  N

5.58 6.01 6.45 6.91 5.58 6.01 6.45 6.91

0.01 0.02 0.03

160641 46618 20868 10767

I

211

41

0.041 0.01 0.02 0.03 0.041

14149448 4106189 1838105 948389

II

46

41

* Applies in the event of the appearance of an initial crack with a length of 5 mm, for C =1.52  10 -10 , m =2.94

Table 2. Remaining exploitation period - crack in the exploited BM

Load case

Geometric term Y

Allowable stress range  ,MPa

Assumed crack length, m

Critical crack length a c ,mm

Number of cycles  N

5.58 6.01 6.21 6.41 5.58 6.01 6.21 6.41

0.01 0.02 0.025 0.028 0.01 0.02 0.025 0.028

20521 9622 7421 6329 318383 149276 115128 98199

I

211

41

II

46

41

* Applies in the event of the appearance of an initial crack with a length of 5 mm, for C =1.48  10 -8 , m =2.94 Table 3. Remaining exploitation period - crack in WM Load case Geometric term Y Allowable stress range  ,MPa Assumed crack length, m Critical crack length a c ,mm

Number of cycles  N

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 8972132 4517323 2677509 1799030 1233369 1090506

I

211

63.5

0.0635

II

46

63.5

0.0635

* Applies in the event of the appearance of an initial crack with a length of 5 mm, from C=1.26 ٠10-9, m=2.5 Table 4. Remaining exploitation period - crack in the HAZ on the side of the new BM Load case Geometric term Y Allowable stress range  ,MPa Assumed crack length, m Critical crack length a c ,mm

Number of cycles  N

5.58 6.01 6.45 6.51 5.58 6.01 6.45 6.51

0.01 0.02 0.03

70053 24775 12611 11382

I

211

32

0.032 0.01 0.02 0.03 0.032

3015732 1066565 542903

II

46

32

489975 * Applies in the event of the appearance of an initial crack with a length of 5 mm, for the case of a crack in the HAZ on the side of the new BM: C=9.61 10-9, and the exponent m = 2.47