Static Structural analysis of gear tooth

This study investigate the characteristics of a gear system including contact stresses, bending stresses, and the transmission errors of gears in mesh. Gearing is one of most critical component in mechanical power transmission systems. The bending stresses in the tooth root were examined using 3D model. Current methods of calculating gear contact stresses use Hertz's equations and Lewis Equation which were originally derived for contact between two cylinders. To enable the investigation of contact problems with FEM, the stiffness relationship between the two contact areas is usually established through a spring placed between the two contacting areas. This can be achieve by inserting a contact element in between the two areas where contact occurs. The results of the three dimensional FEM analysis from ANSYS are presented. These stresses were compared with theoretical values. Both results agree very well. This indicates that the FEM model is accurate. This report also considers the variations of the whole body stiffness arising from gear body rotation due to bending deflection, shearing displacement and contact deformation. Many different positions within the meshing cycle were investigated. Investigation of contact and bending stress characteristics of spur gears continues to be immense attention to both engineers and researchers in spite of many studies in the past. This is because of the advances in the engineering technology that demands for gears with ever increasing load capacities and speeds with high reliability, the designers need to be able to accurately predict the stresses experienced the stresses by the loaded gears.