Fatigue life assessment of welded joints in a crane boom using different structural stress approaches

Brahami Riad; Hamri Okba; Sfarni Samir

doi:10.15282/jmes.13.2.2019.20.0417

Authors

Brahami Riad Laboratoire de Génie de la Construction et Architecture (LGCA), Faculté de Technologie, Université de Bejaia, 06000 Bejaia, Algeria Phone : +213 664429440
Hamri Okba Laboratoire de Génie Mécanique et Développement (LGMD), Ecole Nationale Polytechnique, 16200 Alger, Algeria
Sfarni Samir Laboratoire de Génie de la Construction et Architecture (LGCA), Faculté de Technologie, Université de Bejaia, 06000 Bejaia, Algeria Phone : +213 664429440

DOI:

https://doi.org/10.15282/jmes.13.2.2019.20.0417

Keywords:

Fatigue assessment, Welded joints, Structural stress approach, Finite element analysis, Fatigue strength

Abstract

This article presents a study of the fatigue strength of welded parts in a crane boom. First, a finite element analysis was carried out over the whole structure. Two critical welded zones were identified and a detailed analysis was carried on them, in the form of sub-models. Three different approaches for estimating the structural stress in welded zones, were presented and applied to each sub-model. Results were compared and discussed. The evaluation of fatigue resistance by the use of appropriate S-N curves for each method was also carried out and discussed. The use of these approaches on a complex industrial structure, and on tubular joints with hollow sections required to perform many adaptations and to solve several difficulties presented hereafter.

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