Application of Finite Element to Spur Gear Stress Reduction Using Stress Relieving Feature

Abstract

The aim of this study was to create stress relieving features to reduce the root fillet stress in spur gear. A pilot model was established to predict von Mises stress at the root fillet of the gear without holes and was used as a reference model. Finite element modeling was adopted using Abaqus® package. The predicted stresses were compared with stresses obtained by AGMA analytical solution. A good agreement was found in the comparison between the calculated and predicted stresses. Then, another model, namely hole model, was built to investigate the effect of various hole parameters (number, diameter, location, angle). The hole model was performed by creating hole/holes in the gear body. The results obtained showed that increasing the diameter size of hole/holes resulted in higher percentage of stress reductions compared to the pilot case. Furthermore, increasing the number of holes resulted in higher percentage of stress reductions compared to the pilot case, but gear rigidity in this case was highly affected.