PSI - Issue 28

Giovanni Meneghetti et al. / Procedia Structural Integrity 28 (2020) 1481–1502 Giovanni Meneghetti et al./ Structural Integrity Procedia 00 (2019) 000–000

1494 14

1000

273 174 110 80 (k=3)

D, R = 0.05 D, R = 0.5 Steel joints - IIW and EC3

100

Δσ nom [MPa]

toe failures – steel side Δσ A,97.7% = 110 MPa N A = 2 ∙10 6 cycles T σ (2.3%-97.7%)=2.47 Slope k=5

(f)

10

N A

1,E+04

1,E+05

1,E+06

1,E+07

Number of cycles to failure

1000

E, R = 0.05 E, R = 0.5 Steel joints - IIW

244 153 96 63 (k=3)

100

∆σ nom [MPa]

toe failures – ADI side Δσ A,97.7% = 96 MPa N A = 2 ∙10 6 cycles T σ (2.3%-97.7%) = 2.53 Slope k=11.24

(g)

10

N A

1,E+04

1,E+05

1,E+06

1,E+07

Number of cycles to failure

1000

F, R = 0.05 F, R = 0.5 Steel joints - IIW

280

147 77 80 (k=3) 71 (k=3)

100

∆σ nom [MPa]

toe failures- ADI side Δσ A,97.7% = 77 MPa N A = 2 ∙10 6 cycles T σ (2.3%-97.7%) = 3.36 Slope k= 4.52

(h)

10

N A

1,E+04

1,E+05

1,E+06

1,E+07

Number of cycles to failure

Figure 10: Experimental results of fatigue tests performed on (a) partial-penetration butt joints, (b) full-penetration butt joints, (c) and (d) full penetration ground butt-joints, (e) cruciform nlc fillet-welded joints, (f) T non-load-carrying fillet-welded joints, (g) cruciform load- carrying fillet welded joints, (h) cruciform full-penetration k-butt welded joints.