PSI - Issue 24

12

Giovanni Meneghetti et al. / Procedia Structural Integrity 24 (2019) 190–203 Meneghetti et al./ Structural Integrity Procedia 00 (2019) 000–000

201

2000

Δσ A,97.7% = 139 MPa N A = 2 ∙10 6 cycles Scatter Index (2.3%-97.7%): T σ = 266/139 = 1.91 Slope k = 4.42

*failure at S355J2 side

Scatter band calibrated on experimental results

1000

*

80 (k =3) 266 192 139 90 (k =3)

100

Dissimilar ADI 1050-S355J2 welded joints Steel welded joints - fatigue curve from IIW Steel welded joints - fatigue curve from Eurocode 3

Nominal stress range Δσ [MPa]

Full-penetration butt-joints, R=0.05

N A

10

1.E+04

1.E+05

1.E+06

1.E+07

Number of cycles to failure, Nf

Fig. 11. Experimental results of four-point-bending fatigue tests performed on full-penetration butt-joints; nominal bending stress range evaluated in the cross-section area.

2000

Δσ A,97.7% = 228 MPa N A = 2 ∙10 6 cycles Scatter Index (2.3%-97.7%): T σ = 363/228 = 1.59 Slope k = 27.90

Scatter band calibrated on experimental results

1000

363 287 228

112 (k =3)

100

Dissimilar ADI 1050-S355J2 welded joints Steel welded joints - fatigue curve from IIW

Full-penetration ground butt-joints, R = 0.05

Nominal stress range Δσ [MPa]

N A

10

1.E+04

1.E+05

1.E+06

1.E+07

Number of cycles to failure, Nf

Fig. 12. Experimental results of pure axial fatigue tests performed on full-penetration ground butt-welded joints; nominal axial stress range evaluated in the cross-section area.