Research on calculation of allowable radial load of silicon nitride full ceramic ball bearing

With advancements in science, technology, and industrial production, silicon nitride full ceramic bearings have found widespread applications in aerospace, precision machine tools, high-speed trains, and various other fields due to their exceptional physical properties. However, silicon nitride full ceramic bearings face a critical failure mode: rolling contact surface peeling, primarily caused by their inherent high brittleness and low fracture toughness. To enhance the spalling fatigue failure life of silicon nitride full ceramic bearings, a pseudodynamic model was established, and joint simulation technology utilizing ABAQUS and Franc3D was employed. This study examines the initiation mechanism of secondary surface cracks, a key factor affecting spalling fatigue life, and calculates the allowable radial load for silicon nitride full ceramic bearings without secondary surface cracks. The research findings can significantly extend the service life of silicon nitride ceramic ball bearings by guiding the optimization of their service parameters.