Fatigue Crack Paths 2003

(b)

(a)

Figure 7. F E Mmesh of the ECFface gear (a) and schematic description of the crack

path (b).

Step 1

Step 3

(1.15 mm)

(0.50 m m )

Step 2

m m )

(0.85

(b)

(a)

Figure 8. F E Mmesh of the Westland Helicopters Ltd. face gear (a) and schematic

description of the crack path (b).

Step 3

(0.50 m m )

Step 1

(1.15 m m )

Step 2

(0.85 m m )

Step 4

Step 5

(1.00 m m )

(0.50 m m )

(b)

(a)

Figure 9. F E Mmesh of the ZFFface gear (a) and schematic description of the crack

path (b).