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首页> 外文会议>Bearing steel technology: Developments in rolling bearing steels and testing >Rolling Contact Fatigue Life Test Design and Result Interpretation Methods Maintaining Compatibility of Efficiency and Reliability
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Rolling Contact Fatigue Life Test Design and Result Interpretation Methods Maintaining Compatibility of Efficiency and Reliability

机译：保持效率和可靠性兼容的滚动接触疲劳寿命试验设计和结果解释方法

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In this report, several methods for both rolling contact fatigue (RCF) life test design and result interpretation are introduced. These methods generate results using random numbers followed by Weibull distribution (i.e., Weibull random number). The first method illustrates a relationship between the minimum number of test specimens and the suspension time in a fixed time test required at L_10 and L_50 lives with an arbitrary reliability. This relationship is useful to maintain the qualitative reliability and avoid excessive quantitative testing. The second method can clarify a relationship between the given number of test specimens and resultant significant differences at L_10 and L_50 lives in an accelerated test with an arbitrary reliability. This relationship is also useful to estimate the appropriate number of test specimens based on statistical logic. Of note, calculations employing the Weibull random number can apply to not only RCF life test design but also estimations of the test results. The third method enables the determination of a range of L_10 and L_50 lives with an arbitrary reliability even if the number of test specimens is too small to estimate L_10 or L_50 lives from the Weibull plots. The fourth method can determine significant differences of L_10 and L_50 lives between any two given lots and allow a quantitative estimation of the minimum difference between their lives from data obtained by experiments. These methods provide techniques that are easier to understand as compared to the recent mathematical model, and they show enough flexibility to apply to almost all types of testing. These systems will therefore eliminate the need for qualified experiences related to the statistical design and result interpretation for RCF life testing.
机译：在此报告中，介绍了滚动接触疲劳（RCF）寿命测试设计和结果解释的几种方法。这些方法使用随机数后加Weibull分布（即Weibull随机数）生成结果。第一种方法以最小的可靠性说明了在L_10和L_50所需的固定时间测试中，最小试样数量与悬浮时间之间的关系。这种关系对于保持定性可靠性和避免过多的定量测试很有用。第二种方法可以阐明给定数量的试样与在具有任意可靠性的加速试验中L_10和L_50寿命下产生的显着差异之间的关系。这种关系对于根据统计逻辑估计适当数量的试样也很有用。值得注意的是，采用Weibull随机数进行的计算不仅可以应用于RCF寿命测试设计，而且可以应用于测试结果的估计。第三种方法可以确定L_10和L_50寿命的范围，并且具有任意的可靠性，即使试样的数量太少而无法根据Weibull图估计L_10或L_50寿命。第四种方法可以确定任意两个给定批次之间L_10和L_50寿命的显着差异，并可以根据通过实验获得的数据对它们之间的最小差异进行定量估计。与最新的数学模型相比，这些方法提供的技术更易于理解，并且它们显示出足够的灵活性以应用于几乎所有类型的测试。因此，这些系统将消除对RCF寿命测试的统计设计和结果解释相关的合格经验的需求。

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