文献类型：期刊文献

英文题名：Strength Deterioration With Increasing Specimen Size of an Additively Manufactured Aluminum Alloy in High-Cycle and Very-High-Cycle Fatigue

作者：Pan, Xiangnan[1]; Tao, Zhiqiang[1,2]; Hong, Youshi[1]

第一作者：Pan, Xiangnan

机构：[1] LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China; [2] College of Robotics, Beijing Union University, Beijing, China

第一机构：LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China

年份：2026

卷号：49

期号：3

起止页码：1177-1193

外文期刊名：Fatigue and Fracture of Engineering Materials and Structures

收录：EI(收录号：20254819602814);Scopus(收录号：2-s2.0-105022886284)

语种：英文

外文关键词：Additives - Deterioration - High-cycle fatigue - Normal distribution - Size determination - Weibull distribution

摘要：We conducted a statistical fatigue analysis of an additively manufactured aluminum alloy (AlSi10Mg) with five different sizes of specimens to establish probabilistic S-N curves and assess an anomalous behavior of strength deterioration in high-cycle and very-high-cycle regimes. For the five specimen types, S-N data were obtained by ultrasonic axial cycling at R = ?1. Based on the fitted Basquin equations, the S-N data were converted to equivalent stress amplitudes at the same life. In general, the stress amplitudes can be regarded as normal, log-normal, and Weibull distributions, with the log-normal slightly overestimating the fatigue performance, whereas the Weibull slightly underestimated it, and the normal being the most suitable. Finally, we compared the normal distribution of fatigue resistance with the control volume V90 of specimen types and plotted the strength deterioration from 106 cycles to the extrapolated 1010 cycles, indicating that the specimen size effect diminishes as fatigue life increases. ? 2025 John Wiley & Sons Ltd.