Page 30 - Biaxial Multiaxial Fatigue and Fracture

Assessment of Welded Structures by a Structural Multiaxial Fatigue Approach 15

250 x D (stress relieved)
0 D (as welded)
D
- (stress relieved) mean curve
-
I mean curve
D
welded)
(as
.
.
.
.
.
.
200
100

50
1 E+04 1 E+05 1 E+06 1 E+07
Number of cycles to failure N

250 D (stress relieved)
D (as welded)
D (stress relieved) mean curve
D (as welded) mean curve
J
200

100

50 ii I
1 E+04 1 E+05 1 E+06 1 E+07
Number of cycles to failure N

Fig. 9. Fatigue tests results on both stress relieved and as-welded samples D: (a) without taking
into account residual stresses (b) taking into account residual stresses in TO calculation