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dc.contributor.authorP. Zarandi, Ershad
dc.contributor.authorSkallerud, Bjørn Helge
dc.identifier.citationMarine Structures. 2020, 70 .en_US
dc.description.abstractThis study investigates the low-cycle fatigue behavior of mooring chains high-strength steel grade R4 under different strain amplitudes and strain ratios at room temperature. A fatigue test program has been carried out on small low cycle fatigue specimens cut from large mooring chains. The experimental results characterize the cyclic stress-strain relationship, the mean stress relaxation behavior, and the cyclic plasticity parameters of the material. Strain energy density is correlated with fatigue life through a simple power-law expression and very well represented by BasquinCoffin-Mansion relationship. Further, a non-linear elastic-plastic material model is calibrated to the experimental stress-strain curves and used for the estimation of energy dissipation in the specimens under applied cyclic loads. The predicted fatigue life using the calibrated material parameters demonstrates a close agreement with the experimental fatigue life. Numerical simulations are carried out to analyze local plastic straining and assess crack initiation at the pit site of corroded mooring chains considering the multiaxial stress state. An energy-based approach is employed to estimate the number of cycles needed for a crack to initiate from an existing corrosion pit.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleCyclic behavior and strain energy-based fatigue damage analysis of mooring chains high strength steelen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.source.journalMarine Structuresen_US
dc.description.localcode© 2019 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY licenseen_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal