Evaluation of cyclic loading effects on residual stress relaxation in offshore wind welded structures

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dc.contributor.authorStatti, Giuseppe
dc.contributor.authorMehmanparast, Ali
dc.contributor.authorBiswal, Romali
dc.contributor.authorRizzo, Cesare
dc.date.accessioned2021-08-17T15:33:28Z
dc.date.available2021-08-17T15:33:28Z
dc.date.issued2021-08-14
dc.description.abstractMonopile foundations contain welding residual stresses and are widely used in industry to support offshore wind turbines (OWTs). The monopiles are subjected to hammering loads during installation and cyclic loads during operation, therefore the influence of residual stress redistribution as a result of fatigue cycles must be evaluated in these structures. The existing empirical models to predict the residual stress redistribution in the presence of cyclic loading conditions are strongly dependent on the material, welding process and loading conditions. Hence, there is a need to predict the residual stress redistribution using finite element simulations. In this study numerical analyses have been conducted to predict the initial state of residual stress in a simplified weld geometry and examine the influence of subsequent cyclic loads on the relaxation behavior in residual stress profiles. The results have shown that fatigue cycles have a severe effect on residual stress relaxation with the greatest reduction in residual stress values observed in the first cycle. Moreover, the numerical prediction results have shown that the stress amplitude plays a key role in the extent of residual stress relaxation in welded structures.en_UK
dc.identifier.citationStatti G, Mehmanparast A, Biswal R, Rizzo CM. (2021) Evaluation of cyclic loading effects on residual stress relaxation in offshore wind welded structures. Journal of Multiscale Modeling, Volume 12, Issue 2, 2021, Article number 2150005en_UK
dc.identifier.issn1756-9737
dc.identifier.urihttps://doi.org/10.1142/S1756973721500050
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/17009
dc.language.isoenen_UK
dc.publisherWorld Scientific Publishingen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectResidual stress relaxationen_UK
dc.subjectwelded jointsen_UK
dc.subjectoffshore wind turbinesen_UK
dc.subjectmonopilesen_UK
dc.subjectcyclic loadingen_UK
dc.titleEvaluation of cyclic loading effects on residual stress relaxation in offshore wind welded structuresen_UK
dc.typeArticleen_UK

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