Evaluation of Spur Gear Pair on Tooth Root Bending Stress in Yawing Misalignment Contact Condition

Abstract

This paper evaluates the effects of yawing misalignment contact on the tooth root bending stress values of spur gear pair during the gear meshing cycle. A model basedon involute 3DparametricCAD geometry, of spur gear design ISO 6336:2006 is analyzed with worst loading position when yawing misalignment (Y) exist due to assembly error (AE) between 0.20 to 0.40 in degree scale values. Finite-element method (FEM) with dynamics module from ANSYS is used in order to calculate the tooth root bending stress (TRBS) at the critical region with respect to face width of pinion and gear section. A comparison is made between standard high point single tooth contactmodels (HPSTC) to this model as verification. Further analysis showeda good agreement that these methodologies are adequate in order to conduct a real time dynamics simulation to define the value of TRBS in Y condition due to AE. Yawingmisalignment influence factor (YMIF) was introduced as an indication of TRBS values in consideration of Y due to AEshows a higher result for pinion, give a good justification that the pinion is weaker compared to the gear in Y condition.

Accurate Modelling and Transient Meshing Analysis of Involute Spur Gear Based on the Principle of Gear Shaping

“…Forte et al [4] added the photoelastic experiment on the basis of the above method to further analyse the contact stress however, still did not resolve the same problem of gear modelling. Lias et al [5] studied the gear bending stress of spur gears in misalignment condition by modelling and analysis in software ANSYS, while the root fillet surfaces were replaced by cylindrical surfaces, which caused inevitable errors in the analysis results. Yusuf et al [6] used the geometrical method based on NURBS surface modelling to directly generate the FE model of a spur gear composed of regular hexahedral elements, avoiding the complicated meshes generation process in ANSYS.…”