Fatigue Life Numerical Prediction of Butt Welded Plate under Cyclic Loading

Yi Fei Wang; Wei Lian Qu; Er Nian Zhao; Bai Feng Ji; Liang Wang

doi:10.4028/www.scientific.net/AMR.838-841.265

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 838-841Fatigue Life Numerical Prediction of Butt Welded...

Fatigue Life Numerical Prediction of Butt Welded Plate under Cyclic Loading

Abstract:

Fatigue failure of welded structure has been highly concerned in structural engineering field. At present, the numerical simulation method has been actively applied on fatigue life prediction of welded structures. In this paper, welding residual stress of a butt welded plate was simulated by thermal elastic-plastic finite element method, and welding residual stress relaxation behavior under overload was analyzed. Then, the fatigue life of the welding plate under cyclic loading was numerically predicted with considering the welding residual stress and welding residual stress relaxation, and the result was compared with that calculated according to current steel structures design code of China. The results show that, considering fatigue reliability, the fatigue life calculated based on design formulas of the steel design code is more conservative, and numerical method for fatigue life prediction of welded structures, considering the welding residual stress and welding residual stress relaxation, is a feasible method.

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Periodical:

Advanced Materials Research (Volumes 838-841)

Pages:

265-269

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.838-841.265

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Online since:

November 2013

Authors:

Yi Fei Wang*, Wei Lian Qu, Er Nian Zhao, Bai Feng Ji, Liang Wang

Keywords:

Fatigue Life, Welding Residual Stress, Welding Residual Stress Relaxation

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