A simple estimation method of the stress distribution normal to cross section at weld toe in non-load carrying welded joints

Koji Gotoh, Yukinobu Nagata, Masahiro Toyosada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Many fatigue damages are occurred in the welded built-up structures designed by the hot spot stress methodology, especially near a boxing fillet weld toe. These fatigue cracks usually initiate from the toe and propagate to the plate thickness direction. Although fatigue life is affected by the stress gradient working over crack propagation path, the effect of stress gradient in cross section is not considered in the hot spot stress methodology. Then, many attempts based on fracture mechanics for the improvement of fatigue life estimation are proposed. Whereas stress distributions along the fatigue crack path must be given in order to apply the methods based on fracture mechanics for the precise fatigue life prediction, no stress distribution along the path considering the stress concentration caused by weld toe shape is obtained in practical structural design stages because the shell elements are used infinite element analyses in the design stages. A simple estimation method of the stress distribution normal to cross section at weld toe in non-load carrying welded joints is proposed in this paper. Calculation results of finite element analysis with shell elements and geometrical conditions (radius and flank angle of fillet weld toe and plate thickness) are used as input data for the estimation. The validity of this method is confirmed by comparing estimation results with ones by finite element analysis with solid elements.

Original languageEnglish
Title of host publicationProceedings of 25TH International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2006
Pages8P
DOIs
Publication statusPublished - Nov 30 2006
Event25TH International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2006 - Hamburg, Germany
Duration: Jun 4 2006Jun 9 2006

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume2006

Other

Other25TH International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2006
CountryGermany
CityHamburg
Period6/4/066/9/06

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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    Gotoh, K., Nagata, Y., & Toyosada, M. (2006). A simple estimation method of the stress distribution normal to cross section at weld toe in non-load carrying welded joints. In Proceedings of 25TH International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2006 (pp. 8P). (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 2006). https://doi.org/10.1115/OMAE2006-92094