Study of Circular and Elliptical Holes as a Stress Relieving Feature in Spur Gear

摘要

Gear drive is used to transmit power from one shaft to another when distance between two shafts is very small. There are several failure mechanisms for spur gears. Bending failure of the teeth is one of the main failure modes. In this research work, various stress relieving features are studied. Single circular holes, two circular holes, one circular hole in combination with elliptical hole are used to study the effect of these features in stress reduction. Modeling is done with drafting software AutoCAD. Finite element based software ANSYS is used for this work. Initially using AGMA method bending stresses were determined analytically. A good agreement was found between analytical & finite element results of bending stress.