Abstract A previously developed model for bearing life calculation, based on high-cycle fatigue, including the separation of the surface and the subsurface survival of the rolling contact, is herewith further extended. It now includes the effects of frictional heating with a sharp temperature rise developed in the rolling contact. For this, a new surface damage integral, based on the creep mechanism, is included in the model. With this modification, the detrimental effect of high temperature developed in the rolling contact can now be accounted for. Sharp surface temperature rise during over-rolling are found in bearings operating at high speeds or under the combination of speeds, loads and unfavourable environmental temperatures. The present model introduces a threshold limit value of temperature above which the temperature in the rolling contact is deemed damaging for the steel microstructure and the tribological functionality of the rolling contact. The surface creep-damage model is first calibrated with endurance tests of bearings and then applied to study combinations of loads and speeds and the effect of the steel thermal conductivity on the life expectancy of the bearing. The ability of the present model to include damaging mechanisms, other than classical metal fatigue, increases the flexibility in bearing life predictions and allows to account for phenomena hitherto excluded from the estimation of the bearing fatigue life.

中文翻译：

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具有表面和次表面存活的滚动轴承寿命模型：表面热效应

摘要 先前开发的基于高周疲劳的轴承寿命计算模型，包括滚动接触的表面分离和次表面存活，在此得到进一步扩展。它现在包括摩擦加热的影响，在滚动接触中产生急剧的温升。为此，模型中包含了一个基于蠕变机制的新表面损伤积分。通过这种修改，现在可以解释滚动接触中产生的高温的不利影响。在高速运行或在速度、载荷和不利环境温度的组合下运行的轴承中，发现过滚过程中表面温度急剧上升。本模型引入了温度阈值极限值，高于该阈值时，滚动接触中的温度被认为对钢显微结构和滚动接触的摩擦学功能有害。表面蠕变损伤模型首先通过轴承的耐久性测试进行校准，然后应用于研究载荷和速度的组合以及钢热导率对轴承预期寿命的影响。本模型包括破坏机制的能力，而不是经典的金属疲劳，增加了轴承寿命预测的灵活性，并允许解释迄今为止被排除在轴承疲劳寿命估计之外的现象。表面蠕变损伤模型首先通过轴承的耐久性测试进行校准，然后应用于研究载荷和速度的组合以及钢热导率对轴承预期寿命的影响。本模型包括破坏机制的能力，而不是经典金属疲劳，增加了轴承寿命预测的灵活性，并允许解释迄今为止被排除在轴承疲劳寿命估计之外的现象。表面蠕变损伤模型首先通过轴承的耐久性测试进行校准，然后应用于研究载荷和速度的组合以及钢热导率对轴承预期寿命的影响。本模型包括破坏机制的能力，而不是经典的金属疲劳，增加了轴承寿命预测的灵活性，并允许解释迄今为止被排除在轴承疲劳寿命估计之外的现象。