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The research aims to understand the impact of mean stress on the fatigue behavior of welded tubular structures under specific loading conditions.

March 2, 2026Welding in the WorldOpen Access

Influence of mean stress on the fatigue of welded tubular structures under uniaxial fatigue loading

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Experimental tests assess fatigue under uniaxial loading in welded structures, suggesting improved assessment methods.

The research aims to understand the impact of mean stress on the fatigue behavior of welded tubular structures under specific loading conditions.
Conducted fatigue tests on welded joints with wall thicknesses below 10 mm.
Tested X-joints made from S355J2H and S620QH steels.
Applied up to four different load ratios during the experiments.
Utilized nominal and local stress fatigue approaches for analysis.
Identified discrepancies in current fatigue assessment guidelines.
Highlighted the influence of mean stress effects on fatigue behavior.
Developed recommendations for more accurate fatigue assessment methods.

Kling et al. (2026) studied this question.

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