Issue 62

Yu. G. Matvienko et alii, Frattura ed Integrità Strutturale, 62 (2022) 541-560; DOI: 10.3221/IGF-ESIS.62.37

Stage number, k

Remote stress increment   0 k , MPa

Total remote stress value   0 Σ k , MPa

Maximum circumferential strain increment   3 Δ 10 k x

Total maximum circumferential strain value   3 ΣΔ 10 k x

1 2 3 4 5 6 7 8 9

35.0 37.0 37.0 34.0 31.0 29.0 27.0

35.0 72.0

1.50 1.55 1.56 1.34 1.25 1.15 1.13

1.50 3.05 4.61 5.95 7.20 8.35 8.02 6.64 5.15 3.64 2.14 0.64 x ε

109.0 143.0 174.0 203.0 230.0 193.0 155.0 118.0 80.0 42.0 –30.0 –60.0 –90.0 –90.0 –60.0 –30.0 5.0 –120.0

 A MAX

9.48 =

–37.0 –38.0 –37.0 –38.0 –38.0 –37.0 –35.0 –30.0 –30.0 –30.0

–1.44 –1.38 –1.44 –1.51 –1.50 –1.50 –1.40 –0.94 –0.90 –0.90

10 11 12 13 14 15 16 17 18 19 20 21

–0.76 –1.70 –2.60 –2.70 –1.88 –1.00 x ε

 A MIN

–3.50 =

30.0 30.0 30.0 30.0

0.80 0.82 0.88 1.25

0.0 0.25 Table 3: Load stages and results of fringe patterns interpretation for the 115th cycle.

Stage number, k

Remote stress increment   0 k , MPa

Total remote stress value   0 Σ k , MPa

Maximum circumferential strain increment   3 Δ 10 k x

Total maximum circumferential strain value   3 ΣΔ 10 k x

1 2 3 4 5 6 7 8 9

40.0 40.0 40.0 40.0 35.0 35.0 35.0 35.0 40.0 40.0 40.0 40.0

40.0 80.0 120.0 160.0 195.0 230.0 195.0 160.0 120.0 80.0 40.0 –40.0 –80.0 –80.0 –40.0 –0.0 0.0 –120.0

1.67 1.63 1.53 1.54 1.41 1.44

1.67 3.30 4.83 6.37 7.78 7.94 6.53 4.88 3.23 1.66 0.09 x ε

 A MAX

9.22 =

–1.28 –1.41 –1.65 –1.65 –1.57 –1.57 –1.45 –1.16 –1.10

10 11 12 13 14 15 16 17 18

–40.0 –40.0 –40.0

–1.36 –2.52

 A MIN

x ε

–3.62 =

40.0 40.0 40.0

1.14 1.24 1.46

–2.48 –1.24

0.22 Table 4: Load stages and results of fringe patterns interpretation for the 2927th cycle.

550