Page 432 - Biaxial Multiaxial Fatigue and Fracture

416 AUMN, I? QUAEGEBEUR AND S. DEGALLAIX

Table 7. Material parameters of model NP1.

E G V k cJ~1 YI CJY~ YZ 0
190GPa 65GPa 0.3 390MPa 180MPa 1900 21209MPa 0.786 12.79 0.728
bi QI b2 m Qo n Qi d f g
3.2 -84.5MPa 30 150MPa OMPa 18 946MPa 150 2.8 0.157

-
5

500 320 4
450
400 300 1.7---
0 100 200 300 400 0 100 200 300 400 500
Number of cycles Number of cycles

Fig. 13. Comparison between experiments and simulation for model NPl. (a) Stabilized stress
response for a circle path (Ea = 0.5%); (b) stabilized stress response for a square path = 0.5
%); (c) stabilized stress response for a hourglass path (E~ = 0.5%); (d) stabilized stress response
for a clover path (Ea = 0.5%); (e) cyclic hardeningkoftening curve for a circle path (E~ = 0.5%);
(Q cyclic hardeningkoftening curve for a torsion path following a circle path = 0.5%).