Abaqus Based Modelling of Ball Bearings

Abstract

This thesis investigates whether deep groove ball bearings can be accurately modeled in Abaqus by replacing rolling elements with non-linear springs. The main focus is on the transfer of radial, axial, and combined loads. Existing analytical stiffness models, such as those by Harris and Hamrock, were found inadequate for general use, prompting the development of a new stiffness model. This was achieved through a curve-fitting approach that correlates bearing geometry (e.g., ball diameter, pitch diameter, number of balls, radial play) with displacement data from reference simulations derived using the commercial gearbox software SABR. The final model showed an error margin of less than 5% for most load cases and misalignments. The outcome suggests that this method provides a flexible and accurate tool for simulating bearing stiffness, with potential for broader implementation and further refinement.