Research on anti-fatigue design method of welded structure oriented to stiffness coordination strategy

Abstract

Purpose

In order to obtain the relationship between the geometry and stress concentration of load-bearing welded joints, the fatigue design method of welded structures based on stiffness coordination strategy is studied.

Design/methodology/approach

Based on the structural stress theory, a new method for anti-fatigue design of welded structures oriented to stiffness coordination strategy is proposed, and the detailed implementation process of this method is given. This method is also called the three-stage anti-fatigue design method for welded structures, which includes three stages, namely, identification, analysis and relief of stress concentration.

Findings

Through the experimental analysis of welded joints in IIW standard, the effectiveness of stiffness coordination in welded joint design is proved. The method is applied to the design of welded parts and products, and the feasibility of the method in alleviating the phenomenon of stress concentration and improving the fatigue resistance of welded structures is verified.

Originality/value

In this study, based on the principle of coordinated design of weld stiffness, a three-stage anti-fatigue design method of welded structure is proposed. The method has practical value for the optimization design and anti-fatigue performance improvement of welded structure in engineering products.

Citation

Niu, C., Xie, S. and Zhang, T. (2022), "Research on anti-fatigue design method of welded structure oriented to stiffness coordination strategy", International Journal of Structural Integrity, Vol. 13 No. 2, pp. 196-211. https://doi.org/10.1108/IJSI-10-2021-0115