Proposal of determination procedure about fatigue safety factors for arbitrary best fit curves

机译：关于任意最佳拟合曲线的疲劳安全系数确定程序的建议

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Fatigue safety factors cover not only the scattered range of fatigue test results obtained from test specimens, but also the difference in the fatigue lives between the test specimens and vessels / piping in plants. Therefore necessary safety factors have a relation to the accuracy of a best fit curve which is determined by the test results and the component's conditions. This paper describes a determination procedure of fatigue safety factors for a new best fit curve so that designers can determine adequate safety factors for arbitrary best fit curves and material databases. This determination procedure is explained using a 316FR fatigue database, and the safety factors for new 316FR best fit curve are shown. These safety factors are estimated based on the accuracy of the best fit curve, and are calculated for each surface finish in the designed vessels and piping. Therefore the adoption of accurate best fit curves in limited conditions will result in smaller safety factors than the present code.

机译：疲劳安全系数不仅涵盖从试样获得的疲劳测试结果的分散范围，而且还涵盖试样与工厂容器/管道之间疲劳寿命的差异。因此，必要的安全系数与最佳拟合曲线的精度有关，该曲线由测试结果和组件的状况决定。本文介绍了确定新的最佳拟合曲线的疲劳安全系数的过程，以便设计人员可以为任意最佳拟合曲线和材料数据库确定适当的安全系数。使用316FR疲劳数据库解释了此确定程序，并显示了新316FR最佳拟合曲线的安全系数。这些安全系数是根据最佳拟合曲线的准确性估算的，并针对设计的容器和管道中的每个表面粗糙度进行计算。因此，在有限的条件下采用准确的最佳拟合曲线将导致安全系数小于当前规范。

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《ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference: Design and Analysis of Ressure Vessels and Piping: Implementation of ASME B31, Fatigue, ASME Section VIII, and Buckling Analyses; 20030720-20030724; Cleveland,OH; US》|2003年|P.141-148|共8页
会议地点 Cleveland OH(US)
作者
Nobuchika KAWASAKI;
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作者单位

Japan Nuclear Cycle Development Institute Ibaraki, Japan;

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原文格式 PDF
正文语种 eng
中图分类压力容器;
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Proposal of determination procedure about fatigue safety factors for arbitrary best fit curves

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