Effects of Design Parameters on Static Equivalent Stress of Radial Rolling Bearings

Abstract

The aim of this study is to theoretically investigate the effects of design parameters on the static equivalent stress of radial rolling bearings, such as the point contact case for ball bearings and line contact case for roller bearings. The contact pressure, contact area and von Misses stress of bearings are calculated based on geometrical parameters, material parameters and loading parameters by using the developed MATLAB program. To achieve this aim, both the maximum contact pressure pmax and Von Mises effective stress σVM are simulated with respect to design parameters such as varying ball and roller element diameters and varying ball and roller element elasticity modulus. For the point contact case and line contact case, it was concluded that increasing the diameter of ball and roller elements results in reducing the maximum contact pressure pmax Furthermore, increasing the elasticity modulus of the ball and roller elements results in increasing the maximum contact pressure σVM. Furthermore, increasing the elasticity modulus of the ball and roller element results in increasing the maximum contact pressure pmax and Von Mises effective stress σVM because of the decrease of contact area A. The determination of the diameter of the ball and roller elements and the selection of material are crucial and play an effective role during the design process. Therefore, bearing designers and manufacturers should make the bearing geometrical dimensions as large as possible and bearing material as elastic as possible. Furthermore, the stress-based static failure theory can also be used instead of the standard static load carrying capacity calculation. Moreover, Von Mises stress theory is also compatible with the finite element method.

Comparative Study of Static Stress on Bearing 6207: Analysis Based on Manufacturer Brands and Its Impact on System Performance

“…Equivalent stress in the context of bearings refers to a single stress value used to describe the level of stress acting on the bearing due to the applied load. The use of equivalent stress helps in understanding the level of stress occurring in the bearing and comparing it to the allowable stress limits to determine if the bearing is safe under its operational conditions [11], [19], [20]. The load that must be borne by the bearing becomes very important to ensure longer operational life.…”

Analysis of Contact Stress Distribution between Rolling Element and Variable Diameter Raceway of Cageless Bearing

“…Pandiyarajan et al [11] proposed the contact stress distribution model of bearing parts under variable working conditions, and determined the influence of contact load and rotating speed on the variation law of maximum stress. Mehmet Bozca [12] developed a numerical model to calculate the maximum contact stress according to the geometric parameters of the bearing. The model was taken to provide the raceway contact radius with the static bearing capacity based on the maximum contact stress as the objective function.…”