Effect On Strength of Involute Spur Gear Tooth by Considering Uncertainties in Geometry and Material Properties by Using Finite Element Methods

There are several failure mechanisms for spur gears. Bending failures is one of the main failure modes in spur gears. The Bending stresses in a spur gear can be successfully calculated by finite element analysis. The analysis of spur gear is made in present work for different geometric conditions and material properties. The uncertainties in various geometric parameters like fillet radius, face width, tooth thickness etc. and the uncertainties in material properties are considered to analyze its effects on beam strength of spur gear. A parametric model of spur gear is modeled with the help ANSYS Workbench and then finite element analysis is carried out on the model with the help of ANSYS software. A finite element model with a segment of one tooth is considered for analysis. The gear tooth is meshed and a load is applied on the gear. By applying boundary conditions, the Bending stresses in a spur gear tooth are calculated by Finite Element Analysis which is then compared with the bending stresses calculated by using the LEWIS Equation.