REDUCTION IN STRESS OF SPUR GEAR BY APPLYING STRESS RELIEVING FEATURES WITH VARIANT SHAPE, SIZE AND LOCATION

Abstract

Gear drive is used to transmit power between two shafts when distance between them is very small. It maintains
the stable velocity ratio without slip. It is observed that gears are the most effective by means of transmitting power due
to their high degree of reliability and compactness. The cost of replacement of gear is very high and also the system
down time is one of the effective factors. Failure of gear due to high stresses developed which leads to breakdown of
system.
To avoid failure stresses should be minimized at maximum stress concentrated area. Stress occurs during its
actual working. These stresses can be minimized by introducing stress relief features at stress zone.
In this direction of research work, various stress relieving features were studied. Single or more circular and
oval shape. Also combination of circular and elliptical shape was used to study the effect of these features in stress
reduction. Here effect of ‘Single Aero-fin shape and in combination with other geometrical shapes’ will studied.