Fatigue Crack Paths 2003

Loading path 1 (Proportional)

Loading path 2 (90º shift)

Loading path 3 (Cross)

Loading path 4 (Square)

Loading path 5 (Mean stress negative)

Loading path 6 (Mean stress positive)

Figure 2. Fractographic analyses of the fatigue failure plane orientations under each of

the six loading paths in Table 4.