Mode-III fatigue of welded joints in steel maritime structures

Weld notch shear stress distributions and effective notch stress based resistance

Journal article (2022)

Authors

G. Bufalari Ship Hydromechanics and Structures - Mechanical, Maritime and Materials Engineering
J.H. den Besten Ship Hydromechanics and Structures - Mechanical, Maritime and Materials Engineering
M.L. Kaminski Ship Hydromechanics and Structures - Mechanical, Maritime and Materials Engineering
Research Group
Ship Hydromechanics and Structures (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 G. Bufalari, J.H. den Besten, M.L. Kaminski
DOI
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https://doi.org/10.1016/j.ijfatigue.2022.107210
Fatigue Effective notch stress Mode-III Welded joints Stress distribution
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Published Date

2022

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Marine and Transport Technology

Research Group

Ship Hydromechanics and Structures

Abstract

The predominant mode-I response of maritime structures can be multiaxial, involving out-of-plane mode-III shear components. Semi-analytical mode-III notch stress distribution formulations have been established for critical details like welded T-joints and cruciform joints, reflecting (non-)symmetry with respect to half the plate thickness. Using a stress distribution formulation based effective notch stress as fatigue strength criterion, the mode-III welded joint mid-cycle fatigue resistance characteristics have been investigated. In comparison to mode-I, the material characteristic length and resistance curve slope estimate suggest the fatigue damage process to be even more an initiation related near-surface phenomenon. Mean shear stress effects seem insignificant.