Page 109 - Biaxial Multiaxial Fatigue and Fracture
P. 109
94 L. SVSMEL AND h! PETRONE
7
PlBl - Nf,m = 159OOO Cycies
E
E
E
2On mm
- -
P2B2 - Nf,m = 244403 Cycles
Cycles
244403
=
Nf,m
P2B2
P7B1- Nt,z%= 197275 Cycles r=T-l
X
-T -7-
P4B4 - Nf,* = 1060730 Cvcles P6B4 - Nc~ = 1235690 Cycles
Fig. 7. Cracks pattern at 20% stiffness drop on the bidimensional development of the specimen
gauge surface: fully-reversed bending tests (one critical point only).
