The S-N, -N and da/dN- K curves are the basic data of fatigue property for materials, and they are used in the stress-life method, the local strain method and the LEFM (Linear elastic fracture mechanics) crack propagation method to predict fatigue life of structures, respectively. In the present paper, the relations between these fatigue curves and their probability of predicting each other were discussed through several fatigue-life models. The discussed subjects include (1) predicting the S-N curves from the da/dN- K curves of materials, (2) predicting the S-N curves from the -N curves, and (3) predicting the da/dN- K curves from the -N curves. It is shown that there are certain relations between the S-N, -N and da/dN- K curves of materials and it is predictable from one curve to another.
[1]
G. Glinka.
A cumulative model of fatigue crack growth
,
1982
.
[2]
J. Schijve,et al.
Some formulas for the crack opening stress level
,
1980
.
[3]
F. Erdogan,et al.
Stress Intensity Factors
,
1983
.
[4]
J. Newman.
Effects of constraint on crack growth under aircraft spectrum loading
,
1992
.
[5]
Wanlin Guo,et al.
3D constraint effect on 3D fatigue crack propagation
,
2005
.
[6]
V. V. Bolotin.
Fatigue Life Prediction of Structures
,
1994
.
[7]
Wanlin Guo,et al.
Modified James–Anderson method for stress intensity factors of three-dimensional cracked bodies
,
2005
.