Fatigue assessment of welded joints considering local geometry based on the zero-point effective notch stress method

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research Pub Date : 2025-03-01 DOI:10.1016/j.jcsr.2025.109476

Caiyan Deng , Chenyu Luo , Yue Ma , Baoming Gong , Yong Liu , Zongxian Song

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引用次数: 0

Abstract

Local geometric discontinuity in welded components can have a significant impact on the high-cycle fatigue performance. However, the widely used fatigue assessment method for welded joint cannot adequately account for this effect. In the work, the zero-point effective notch stress (ZPENS) method is introduced as an alternative for fatigue assessment of welded joints and compared with nominal stress method, structural hot-spot stress method, effective notch stress method, and strain energy density method. A total of 295 fatigue data points, including cruciform, butt and T-joints, were collected from the literature for comparison. The results demonstrate that the ZPENS method can effectively capture the effect of local geometry on fatigue property and reduce the scatter in fatigue data compared to other methods. Additionally, the thickness correction formula recommended by the IIW is also applicable to the ZPENS method, further reducing fatigue data scatter induced by the size effect.

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来源期刊

Journal of Constructional Steel Research 工程技术-工程：土木

CiteScore

7.90

自引率

19.50%

发文量

550

审稿时长

46 days

期刊介绍： The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.