Non-Hertz Contact and Failure Mechanism Analysis of Ball Bearings with Deep Groove
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摘要: 考虑轴向载荷、弹塑性本构、协调接触、轴承游隙等因素的影响，对某汽车变速器中所采用的深沟球轴承在服役过程中出现的失效问题通过非赫兹有限元数值模型进行了求解，并据此分析了该轴承在工作过程中的失效机理。进一步研究了轴承材料本构、交变载荷等因素对接触状态的影响。结果表明：弹性本构承载体积小于弹塑性本构，应力水平高于弹塑性本构；载荷按一定角度作用可以降低轴承内部应力极值；载荷增加使应力极值和初始屈服深度增加，但当载荷过大时，初始屈服深度会急剧减小。Abstract: Considering the effects of the axial load, elasto-plastic constitutive, coordinated contact, bearing clearance and other factors, the failure of the ball bearing with deep groove used in an automotive transmission in the service process is solved by the non-Hertz finite element model. Based on the above-mentioned, the failure mechanism of the bearing in the servicing process is obtained. The effects of the constitutive model for bearing material and the alternating load on the contact state are further studied. The results show that the elastic constitutive model has a smaller bearing capacity than the elasto-plastic constitutive model, and the stress level is higher. The load can reduce the internal stress extreme value of the bearing at a certain angle. The stress extreme value and the initial yield depth increases with the increasing of load. But when the load is too large, the initial yield depth decreases sharply.
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表 1 滚珠载荷分布
滚珠序号 径向力/N 轴向力/N 1 7 615.11 385.33 2 4 449.48 747.85 3 1 018.70 547.58 4 608.62 532.68 5 672.47 641.45 6 608.41 536.33 7 1 049.46 555.82 8 4 384.27 731.83 
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