Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 149, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2021.106299
Keywords
Thin-walled cold roll-formed steel sections; Fatigue modelling; Manufacturing residual stresses; Numerical modelling; Theory of critical distances
Funding
- FASTCOLD RFCS European research project [745982]
- Portuguese Foundation for Science and Technology, IP (FCT) [PD/BD/143141/2019]
- CONSTRUCT-Instituto de I&D em Estruturas e Construcoes - FCT/MCTES (PIDDAC) [UIDB/04708/2020, UIDP/04708/2020]
- Fundação para a Ciência e a Tecnologia [PD/BD/143141/2019] Funding Source: FCT
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This paper presents experimental research on the fatigue behavior of thin-walled cold rollformed steel sections commonly used in rack structures. A new design S-N curve is derived from innovative testing methodology to support the revision of Eurocode 3. Additionally, a local fatigue approach incorporating residual stresses and elastoplastic stress analysis provided consistent fatigue life predictions.
This paper presents experimental research aimed at addressing the fatigue behaviour of thin-walled cold rollformed steel sections, very commonly used in rack structures. This research is performed under the FASTCOLD-RFCS project, which aims to fill an existing gap on fatigue design rules. A new design S-N curve is derived from an innovative testing methodology, which supports the current revision of the Eurocode 3 (EN 1993-1-9). Additionally, a local fatigue approach, encompassing residual stresses from numerically simulating the manufacturing process and structural elastoplastic stress analysis supported by the Theory of Critical Distances, returned consistent fatigue life predictions for the tested profiles.
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