Issue 60

H. Djeloud et alii, Frattura ed Integrità Strutturale, 60 (2022) 346-362; DOI: 10.3221/IGF-ESIS.60.24

2.0x10 3 1.2x10 4 Stress intensity factor [MPa(mm) 0.5 ] 4.0x10 3 6.0x10 3 8.0x10 3 1.0x10 4

K I J-integral K I SED approach

0 10000 20000 30000 40000 50000 60000

Number of cyclic

I K versus number of cyclic.

Figure 16: Stress intensity factor

Weld toe

Crack

ൌ 90

Figure 17: Cruciform welded joints with different crack orientation.

C ONCLUSIONS

XFEM. T

he fatigue performance of cruciform welded joints made Hardox 450 steel has been studied in this paper, the comparison between the SIF by SED and SIF by J-integral was carried out. The following conclusions can be proposed based on the results: - The SED approach was used to successfully calculate the mode I, SIF of crack-containing cruciform welded joints using

358