216
L. Zhao et al.
(a) α=14.5
(b) α=17.5º
º
º
( c ) α=20º
(d) α=22.5º
(e) α=25
Fig. 17.5 Bending stress from FEA for spur gear
Table 17.2 Bending stresses (MPa) for gears with different pressure angle from ISO, GATES and
FEA
ε α
α
σ F_ISO
σ F-FEA
σ F-GATES-tip relief
2.048
14.5
289.7797
345.29
245.1
1.846
17.5
394.376
412
371.3
1.711
20
381.779
394.51
358.7
1.6
22.5
391.368
396.94
364.9
1.51
25
404.729
414.84
374.8
200
250
300
350
400
450
14.5
17.5
20
22.5
25
BENDING STRESS [MPA]
PRESSURE ANGLE [ ]
BENDING STRESS
σF_ISO
σF-FEA
σF-GATES-tip relief
Fig. 17.6 Bending stresses for spur gears with different pressure angle from ISO, GATES and FEA