The relation between the contact fatigue life and the residual stresses is more complex.
残余应力与疲劳寿命的关系较为复杂。
The numerical results show that the gear contact fatigue life is connected with gear rotational velocity.
数值计算结果表明：齿轮传动的接触疲劳寿命与齿轮转速戚息相关。
The rolling contact fatigue life was found to be markedly related the subsurface crack propagation Angle.
疲劳寿命与次表面裂纹扩展角之间存在着明显的对应关系。
Therefore, it is necessary and feasible to explore the effect of gear rotational speed on the gear contact fatigue life.
所以，探讨齿轮转速对齿轮传动接触疲劳寿命影响是必要且可行的。
Through experimental comparison, the new process method can significantly improve the contact fatigue life of the coating layer.
通过实验对比，这种新工艺方法可以显著地提高涂层的接触疲劳寿命。
The rolling contact fatigue life, hardness, residual stresses and the amount of retained austenite of the specimens were measured.
测定了试样的接触疲劳寿命、硬度、残余应力和残余奥氏体量。
Effects of nano diamond particles on contact fatigue life of steel ball were evaluated on a self-made ball-rod contact fatigue tester.
利用自制的球-棒疲劳试验机，研究了纳米金刚石粉对钢球接触疲劳寿命的影响。
A new explanation of reason why the rolling contact fatigue life can be prolonged by residual compressive stress and retained austenite was advanced.
并对残余压应力和残余奥氏体可以提高接触疲劳寿命的原因提出了新的解释。
The test indicates that contact fatigue life and wear resistance of surface quenched casting steels and Bainite quenched spherical cast iron are increased largely.
试验表明：经过表面淬火的铸钢和经过贝氏体淬火的球墨铸铁，其接触疲劳寿命和耐磨性大幅度提高。
The results show that nitrogen has remarkable influences on rolling contact fatigue life and plain strain fracture toughness, and little influences on wear resistance.
结果表明，含氮量对滚动接触疲劳寿命及平面应变断裂韧性具有很显著的影响，而对耐磨性影响很小。
This research studies the effect of different carbon and chrome content on the microstructure, carbides, hardness and contact fatigue life of the stainless bearing steel.
通过试验研究了不同碳、铬含量对不锈轴承钢的显微组织、碳化物、硬度和接触疲劳寿命的影响。
The analysis on fatigue cracks of the outer race of aero-bearing shows that the distribution of residual tensile stress on race surface could reduce its contact fatigue life.
航空轴承外圈的疲劳裂纹分析表明，套圈表面的残余压应力分布致使轴承表面接触疲劳寿命降低。
According to the calculation results, the fatigue life of gears is calculated by limited life design theory and the contact stress and fatigue life are obtained.
根据计算结果，应用齿轮有限寿命设计理论对齿轮疲劳寿命进行计算，得到齿轮的接触应力和疲劳寿命。
This paper discusses wear life of laser cladding samples with the aid of the theory of contact fatigue wear.
利用接触疲劳磨损理论讨论激光熔覆试样的疲劳磨损寿命问题。
The experiments on contact fatigue and bearing life have been conducted.
进行了接触疲劳、轴承寿命试验。
It may decrease fatigue damage causing by rolling contact and side damage on track and prolong rail service life 0.5 ~ 1 time by means of grinding rail track.
通过对钢轨的修磨可减少由于滚动接触疲劳引起的钢轨损伤，减少钢轨侧面磨损，可延长钢轨的使用寿命0.5 ~1倍。
The intensity of bending fatigue and contact fatigue for gears is one of the important indices (indexes) to judge gear service life.
齿轮的弯曲疲劳强度与接触疲劳强度是判断齿轮使用寿命的重要指标之一。
Based on the broken gear teeth in contact fatigue test, bending fatigue life curve was got by applying finite element stress analysis results, MSC.
本文以接触疲劳试验中疲劳断齿齿轮为依据，利用有限元应力分析结果以及试验得到的弯曲疲劳寿命曲线，应用msc。
Analyses results show that the materials, tension and rigidity of wires, speed of trains, wave speed, and lift forces are primary factors that affect fatigue life of contact wires.
分析结果表明，接触导线线质、张力和刚度以及列车运行速度、波动传播速度和抬升力是影响导线疲劳可靠性的主要因素。
The failure modes of the coatings can be predicted if the contact stress and the fatigue life are designated. And the prediction accuracy of the failure mode is above 65%.
建立了涂层失效模式的判别准则，当指定接触应力和疲劳寿命时可以预测涂层的失效模式，且预测正确率在65%以上；
The failure modes of the coatings can be predicted if the contact stress and the fatigue life are designated. And the prediction accuracy of the failure mode is above 65%.
建立了涂层失效模式的判别准则，当指定接触应力和疲劳寿命时可以预测涂层的失效模式，且预测正确率在65%以上；
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