Fatigue life evaluation of an ultrafine-grained pure aluminum

被引：0

作者：

Babaei, Alireza ^{[1
]}

Esmaeili-Goldarag, Firooz ^{[2
]}

Jafarzadeh, Hossein ^{[3
]}

机构：

[1] Department of Mechanical Engineering, Technical Faculty of No.2, Tabriz Branch, Technical and Vocational University (TVU), Tabriz, Iran

[2] Department of Mechanical Engineering, University College of Nabi Akram (UCNA), Tabriz, Iran

[3] Department of Mechanical Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

来源：

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications | 2020年 / 234卷 / 01期

关键词：

Numerical methods;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The aim of this study is an experimental and numerical investigation of the fatigue behavior of a notched ultrafine-grained pure aluminum processed by strip cyclic extrusion-compression method. In this regard, the fatigue experiments were conducted for the unprocessed and strip cyclic extrusion-compression processed specimens under various cyclic loads. In the numerical analyses, a dislocation dynamic constitutive material model which tracks the microstructure evolution was implemented for numerical estimation of the values of fatigue strength reduction factor via the volumetric approach. Considering the three-dimensional effect near the plate hole, the variation of the fatigue notch factor through the thickness of the plate was investigated and the obtained results showed that maximum fatigue strength reduction factor was occurred in the middle of the plate due to the symmetry of specimen geometry and loading condition. The investigation reveals a good agreement between the numerical and experimental lives. The results showed although the smooth processed specimens have higher fatigue strength in comparison of the unprocessed ones, the notched processed specimens have lower fatigue strength in comparison of the unprocessed ones. © IMechE 2019.

引用

页码：90 / 104

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