for seminar

1. GENBA SOPANRAO MOZE TRUST'S
GENBA SOPANRAO MOZE COLLEGE OF ENGINEERING,
BALEWADI
Seminar on
“Stress Analysis of Eccentric Gear with
Asymmetrical Profile of Teeth”
Under guidance of,
Prof. V.U.Mane
Presented by,
Sachin Yadagudi
Roll No- 59

2. Objective
stress calculated in a standard way according to
available formulas is approximate because some
impacts cannot be determined with sufficient
accuracy.
The problem is solved for elliptical, eccentric gear
with asymmetrical profile of tooth.

3. Inroduction
• The stress calculation of this non-standard
gearing is very complex
• Comparative stress
• The complicated shape of the teeth is the
determination of stress in the teeth difficult
• stress examining in a section of the foot tooth
with asymmetrical profile

4. Literature Review
Stress analysis of eccentric gear asymmetrical
profil of teeth
American journal of mechanical engineering volume-04
(Peter Frankovský)
 geometric design of involute spur gear drives
symmetric &asymmetric teeth
Iternational Journal Of Mechanical Science
(ognyan alipieve)

5. Bending Stress of Gearing

6. Gear with Asymmetrical Profile of
Tooth
• Noncircular gear with
variable transmission
• Module= 3.75 mm
• Changing gear ratio for
analysis
• Ellipse formed with the
basic parameters

7. Meshing of Gears

8. Changing transmission ratio
• Mesh generated elliptical
gear, speed varies in u=0.5
through u=1.0 until u=2.0
and back
• Drive wheel gear speed is
constant
• Continuous changing of the
gear ratio driven wheel
speed is not constant

9. Rotational speed

10. Stress of Teeth by FEM
• Create a geometric model of
the gear
• determine the material
constants, the type of finite
element, and boundary
conditions
• gear continuously variable
transmission numbers
• stress in a dangerous section of
the tooth is determined using
FEM

11. Results of stress in the section of tooth
Gear ratio u = 0.5 u = 1 u = 2
Mesh point A B A B A B
Force Fbn [N] 886,8 1773,6 1182,4 2364,8 1773,6 3547,2
Medium Stress
in point Y [MPa]
90,58 131,1 100,2 148,2 141,4 240,0
Max. Stress
in point Y [MPa]
91,52 139,5 112,7 157,7 153,0 245,8
Min. Stress
in point Y [MPa]
79,37 121,5 96,95 136,9 128,73 213,1
Medium Stress
in point X [MPa]
100,3 149,2 114,4 192,8 168,1 299,5
Max. Stress
in point X [MPa]
107,3 160,5 123,4 207,4 181,1 321,8
Min. Stress
in point X [MPa]
91,21 136,9 104,5 176,3 153,7 273,5

12. Solutions to stress in gear by FEM

13. Analysis of gear teeth
• the medium stress in a
dangerous section of
tooth
• The stress in the foot
the tooth drive gear
increases with gear
ratio

14. Conclusion
 Stress in a dangerous section of teeth on the load
side and on the opposite side is different
 The stress in the foot the tooth drive gear increases
with gear ratio.

15. Thank you...