Fatigue life prediction of 5083 and 5A06 aluminum alloy T-welded joints based on the fatigue characteristics domain

li zou; Xinhua Yang; Jianrong Tan; Hongji Xu; Yibo Sun

doi:10.3221/IGF-ESIS.45.05

Fatigue life prediction of 5083 and 5A06 aluminum alloy T-welded joints based on the fatigue characteristics domain

Authors

li zou Dalian Key Laboratory of Welded Structures and Its Intelligent Manufacturing Technology (IMT) of Rail Transportation Equipment, Dalian Jiaotong University, China; Sichuan Provincial Key Lab of Process Equipment and Control, China
Xinhua Yang Dalian Key Laboratory of Welded Structures and Its Intelligent Manufacturing Technology(IMT) of Rail Transportation Equipment, Dalian Jiaotong University
Jianrong Tan Department of mechanical engineering and automation, Zhejiang University
Hongji Xu Dalian Key Laboratory of Welded Structures and Its Intelligent Manufacturing Technology(IMT) of Rail Transportation Equipment, Dalian Jiaotong University
Yibo Sun Dalian Key Laboratory of Welded Structures and Its Intelligent Manufacturing Technology(IMT) of Rail Transportation Equipment, Dalian Jiaotong University

DOI:

https://doi.org/10.3221/IGF-ESIS.45.05

Keywords:

Fatigue life, welded joints, fatigue characteristic domain

Abstract

Three-point bending fatigue test of 5083 and 5A06 aluminum alloy T-welded joints is carried out, and the fatigue life of the specimens with different influencing factors are obtained. Finite element model of the T-welded joint is established and the nodal force based structural stress is calculated. Neighborhood rough set theory is used for analysis of the factors which influence the fatigue life of the aluminum alloy welded joints. Key influencing factors are studied and the fatigue characteristic domains are determined. The master S-N curve characterized by the nodal force based structural stress range and cycles to failure on semi log coordinate as well as S-N curves corresponding to the fatigue characteristic domain is fitted. A case study of fatigue life prediction of 5A06 aluminum alloy welded joint indicates the effectiveness of the fatigue life prediction method based on the fatigue characteristic domain.

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Published

16-06-2018

Issue

Vol. 12 No. 45 (2018): July 2018

Section

Miscellanea

License

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Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

Fatigue life prediction of 5083 and 5A06 aluminum alloy T-welded joints based on the fatigue characteristics domain. (2018). Frattura Ed Integrità Strutturale, 12(45), 43-66. https://doi.org/10.3221/IGF-ESIS.45.05