Page 364 - Biaxial Multiaxial Fatigue and Fracture

348 c. CAL~ R. CITARELLA AND M. PERRELLA

Crack 1

15 - - -NumericnO1
0 Experimental nO1 c-----c---i-

1 +i7---t---t-
0 -,- -~---- --t --- ---,--
tl--A----
'
I
I
-
-
,-+-
570000 620000 670000 720000 770000 820000 870000 920000 970000 I020000 1070000 IlZOOOO
N [cycles]
Fig. 8. Crack length versus number of cycles for crack 1, as obtained by simulation with Paris
law (applied to specimen 1) and NASGRO 2.0 law (applied to specimen 2), together with
related experimental data.
Crack 2
18 -

____ __
Experimental n"1 F-L.
A Experimental n"2 1

ai
570000 630000 690000 750000 810000 870000 930000 990000 1050000 1110000
N [cycles]

Fig. 9. Crack length versus number of cycles for crack 2, as obtained by simulation with Paris
law (applied to specimen 1) and NASGRO 2.0 law (applied to specimen 2), together with
related experimental data.