PSI - Issue 66

Miloslav Kepka Jr. et al. / Procedia Structural Integrity 66 (2024) 135–141 Miloslav Kepka Jr. et al / Structural Integrity Procedia 00 (2025) 000 – 000

140

6

& d/'h d ^d^

Initial ǁĞůĚƐ

F max [kN]

F min [kN]

Number of cycles to reach the criterion

Specimen

1 2 3 4 5 6 7 8 9

6 0,86 10 000 000 (run out) 6 0,86 10 000 000 (run out) 6 0,86 10 000 000 (run out)

6 0,86 6 0,86 6 0,86

978 802 375 117 240 562 247 643 141 911 230 719 323 535 397 932 263 396

• EŽŶͲĚĞƐƚƌƵĐƚŝǀĞ ƚĞƐƚƐ • 'ƌŝŶĚŝŶŐ ŽƵƚ ĨĂƚŝŐƵĞ ĐƌĂĐŬƐ • tĞůĚŝŶŐ ;ƌŽŽƚ ĂŶĚ ĐŽǀĞƌ ůĂLJĞƌͿ • ůĞĂŶŝŶŐ ŽĨ ƐĂŵƉůĞƐ • ƉƉůŝĐĂƚŝŽŶ ŽĨ ,&D/ ŽŶ ϱ ƐĂŵƉůĞƐ ŽĨ ϵ • &ĂƚŝŐƵĞ ƚĞƐƚƐ

7 7 7 7 7 7

1 1 1 1 1 1

10 11 12

Repair ǁĞůĚƐ

ZĞƉĂŝƌ ǁĞůĚƐ н ,&D/

F max [kN]

F min [kN]

Number of cycles to the total failure

F max [kN]

F min [kN]

Number of cycles to the total failure

Specimen

Specimen

6 8

6 0,86

579 158 367 616 247 212 454 683

4 5 7 9

6 0,86

2 924106

7 7 7

1 1 1

6 0,86 10 000000(run out)

10 12

7 7 7

1

1 872460

1 10 000000(run out) 1 10 000 000 (run out)

11

Fig. 9. Results of fatigue tests of samples with repaired welds.

The presented results of the implemented program again led to perspective conclusions: • on suitable welds, the application of HFMI can achieve a higher fatigue life of repair welds compared to the original welds; • the fatigue life of the examined test samples was extended by more than 4 times.

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