| Citation: | JIN Feng, CAI Zhenqing, XIE Zhihao, et al. Research on damage and response of deep groove ball bearings under axial impact load[J]. Journal of Aerospace Power, 2025, 40（4）：20240508 doi: 10.13224/j.cnki.jasp.20240508
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The damage and response of rotor bearing under axial impact load were studied. A test bench for simulating aero-engine bearing damage in laboratory was designed, and a finite element model of bearing impact based on plastic kinematic (PK) constitutive model was established. The damage and response of deep groove ball bearing under low, medium and high impact velocities were studied. The results showed that the error between the finite element simulation results and the experimental results was within 10%. As the impact velocity increased, the damage form of the bearing ball increased from a slender dent to a regional dent. The cause of the damage was the extrusion between the ball and the inner and outer rings of the bearing caused by deformation. During the impact process at different speeds, the maximum stress always appeared on the bearing ball, and the contact force and change rule between the ball and the inner and outer rings of the bearing were basically the same. The cage joint and the inner ring in contact with the ball were located at the position where the plastic deformation was large under the impact of axial load.
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