FEA of Deep Groove Ball Bearing

Deep groove ball bearing’s structure is simple and is widely applied. Its main failure mode is contact fatigue spalling of rolling elements. The contact finite element analysis can show bearing’s information under contact, such as contact stress, strain, penetration and sliding distance, and so on, which play a significant role in optimum design of complicated rolling bearings. Contact is a complex nonlinear phenomenon, which involves not only change in state, but also accompanies with heat or electricity. Contact problem mainly includes two considerable difficulties at present. Firstly, before solving problems, the specific contact area isn’t usually been known. With the change of load, material, boundary condition or the other factors, touch or separation will take place between surfaces. That is hard to predict, even is an abrupt change. Secondly, most frictional effects on contact problems are needed to be considered. The difficulty of the studies of ball bearings is the contact between the rotating and inner or outer rings. It is point contact when the load is zero, while the contact point is expanded into an elliptical contact surface after the loading. In this case study a deep groove ball bearing has been taken up for an example, and builds its finite element 3-D parameterized model by using FEA (Finite Element Analysis) software ANSYS Workbench. Based on that, the contact stress and deformation are analyzed and calculated, which provide the basis for the design and optimization of deep groove ball bearings.


Finite Element Analysis

Ball Bearing


Geometry of Ball Bearing




Meshed Model


Constrained Geometry


Hertz Theory Calculation


Equivalent Stress Plot


Equivalent Stress on Ball


Total Deformation Plot


Contact Pressure on Balls


Maximum Shear Stress


Results and Discussions

Final Deduction




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