Abstract—Gearing is one of the most critical components in the mechanical power transmission system and in most industrial rotating machinery. It is possible that gears will be the most effective means of transmitting power in future machines due to their high degree of reliability and compactness. In 18th century saw an explosion in metal gearing. Gear design and manufacturing rapidly developed in the 19th century. Now a day, the gear design has become a highly complicated and comprehensive subject. An asymmetric spur gear tooth means that the two profiles (sides) of a gear tooth are functionally different for many gears. The workload on one profile is significantly higher and is applied for longer periods of time than for the opposite one. The design of the asymmetric tooth shape reflects this functional difference. The main objective of the present work is to estimate the stress across the critical section for different backup ratios and the results obtained. Developed programme is used to create a finite element model for asymmetric spur gear tooth to study the effect of bending stress at the critical section for different backup ratios. To study the effect of above parameter ANSYS was used. The rim thickness and the pressure angle was varied and the location and magnitude of the maximum bending stresses were reported and results obtained and compared.

Index Terms—Rim thickness, Pressure angle, Asymmetric spur gear tooth, Finite element analysis, Bending stress

Cite: Sharatchandrai R Karagi and Prashant S Patil, "Effect of Pressure Angle and Back Up Ratio on Asymmetric Spur Gear Tooth Bending Stress," International Journal of Mechanical Engineering and Robotics Research, Vol.3, No.4, pp. 578-584, October 2014.