Probabilistic approach to operational fatigue-life evaluation part II. Calculation of fatigue-life distribution function with respect to inhomogeneity of material properties and random loading

V.Kliman

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Probabilistic approach to operational fatigue-life evaluation part II. Calculation of fatigue-life distribution function with respect to inhomogeneity of material properties and random loading

机译：操作疲劳寿命评估的概率方法第二部分。关于材料特性不均匀性和随机载荷的疲劳寿命分布函数的计算

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A model for estimation of fatigue-life distributionfunction with respect to random character of the load process waspresented in Part I. In this paper the extension of this model isproposed using a probabilistic interpretation of materialcharacteristics. By means of a proper connection of the set ofrepresenting material parameters and loading characteristics thecomplete model of life estimation arises. This model enablescomputation of a fatigue-life distribution function (DF) respectingthe stochastic nature of the interacting material and loadingcharacteristics. A set of material parameters, entering thecalculation in probabilistic form, is obtained by statisticaltreatment of the experimental dependences #sigma#_a = f(2N_f)and #epsilon#_ap = f(2N_f), by means of the confidence andprediction intervals. A set of loading characteristics, representingthe random process, is obtained by a proper segmentation of theload process record. Resultant DF allows to estimate the life forthe required probability of failure occurrence (premature fatiguefracture) and can be widely used at design stage or in operation.DF enables to assess different combinations of materials and loadconditions. The concrete procedure of its estimation is presented.DF obtained is in a good agreement with the experimental results.

机译：第一部分提出了一种关于载荷过程随机特征的疲劳寿命分布函数的估计模型。在本文中，该模型的扩展是使用材料特性的概率解释提出的。通过一组代表材料参数和载荷特性的正确连接，可以得出寿命估算的完整模型。该模型可以计算疲劳寿命分布函数（DF），该函数应考虑相互作用材料的随机特性和载荷特性。通过对置信度和预测间隔对实验依赖性＃sigma＃_a = f（2N_f）和＃epsilon＃_ap = f（2N_f）进行统计处理，获得以概率形式进入计算的一组材料参数。通过对负载过程记录进行适当的分段，可以获得代表随机过程的一组负载特征。结果DF可以估计所需的故障发生概率（过早疲劳断裂）的寿命，并且可以在设计阶段或操作中广泛使用。DF可以评估材料和载荷条件的不同组合。给出了其估计的具体过程。得到的DF与实验结果吻合良好。

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《Kovove materialy》 |1999年第1期|共16页
作者
V.Kliman;
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正文语种 cze
中图分类金属材料;
关键词
fatigue-life estimation model; life distribution function; fatigue-damage accumulation hypothesis; hysteresis energy; random loading; probability of failure reliability; mean stress; material properties inhomogeneity;

机译：疲劳寿命估计模型;寿命分布函数;疲劳损伤累积假说;磁滞能量;随机载荷;失效概率;平均应力;材料特性不均匀性;

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1. Probabilistic approach to operational fatigue-life evaluation part II. Calculation of fatigue-life distribution function with respect to inhomogeneity of material properties and random loading [J] . V.Kliman Kovove materialy . 1999,第1期

机译：操作疲劳寿命评估的概率方法第二部分。关于材料特性不均匀性和随机载荷的疲劳寿命分布函数的计算
2. On the Relation between Static-Strength and Fatigue-Life Distributions of Composite Materials [J] . Ho-Chih Cheng, Wen-Fang Wu Journal of the Chinese Society of Mechanical Engineers. Series C . 2002,第3期

机译：复合材料的静强度与疲劳寿命分布的关系
3. Probabilistic approach to fatigue reliability assessment Part I. Fatigue-life estimation model [J] . V. KLIMAN, V. GIBA, J. JELEMENSKA, Strojnicky Casopis . 2010,第4期

机译：疲劳可靠性评估的概率方法第一部分。疲劳寿命估计模型
4. Evaluation of Statistic Probability Distribution Functions: II. Chi-Squared Probability Function and the Inverse Functions of z, t, F, and Chi-Squared Distributions [C] . Ruming Li, Manjit S. Kang, Guixue Wang International Conference on Computational Science and Computational Intelligence . 2016

机译：统计概率分布函数的评估：II。卡方概率函数和z，t，F和卡方分布的反函数
5. A variational approach to the calculation of bearing load distribution. [D] . Jungmann, Richard Heinz. 1992

机译：一种计算轴承载荷分布的变分方法。
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Probabilistic approach to operational fatigue-life evaluation part II. Calculation of fatigue-life distribution function with respect to inhomogeneity of material properties and random loading

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