Page 423 - Biaxial Multiaxial Fatigue and Fracture

Cyclic Behaoiour of a Duplex Stainless Steel Under Multiaxial Loading: Experiments and Modelling 407

-
2
a)
0001 0002
0

-400 - -0.005 -

EP
r-- -7- -I P
-0006 -0004 -0 02 0004 0006
05 001

-800 -400

Fig. 6. Responses in different planes {a: (IS, & z) , b: (E‘, yp/&), c: (z, y’) , d: (0, }
E’)
during the first 50 cycles of a test conducted with a hourglass path, a strain amplitude of 0.5 %
and a zero mean strain.

0 50 100 150
Number of cycles

Fig. 7. Cyclic hardening-softening curves with a strain amplitude of 0.5 %, for seven different
loading paths.