Fatigue crack growth rates for offshore wind monopile weldments in air and seawater: SLIC inter-laboratory test results

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dc.contributor.authorMehmanparast, Ali
dc.contributor.authorBrennan, Feargal P.
dc.contributor.authorTavares, Isaac
dc.date.accessioned2016-12-20T12:26:35Z
dc.date.available2016-12-20T12:26:35Z
dc.date.issued2016-11-02
dc.description.abstractThe majority of fatigue crack growth (FCG) data sets available on steels in air and seawater environments are several decades old and may not be appropriate for structural integrity assessment of offshore wind turbine foundations, which are fabricated using contemporary materials and welding technologies. Therefore, the SLIC joint industry project was formed to investigate the fatigue crack initiation and growth behaviour in offshore wind welded steel foundations. The FCG test data from the SLIC inter-laboratory (round robin) test programme have been analysed using a new proposed shape function solution and the results are presented and discussed. The obtained FCG trends in air and seawater environments have been compared with the recommended trends available in standards. The Paris-law constants and ΔKth values obtained from this programme can be used for defect assessment and remaining life prediction of offshore monopile weldments in air and seawater environments. The results from the SLIC project show that for a given value of ΔK the fatigue crack growth rate, da/dN, is on average around 2 times higher in seawater compared to air for the base metal and weldments. This factor of 2 in the seawater environment is almost half of the crack acceleration factor recommended by standards.en_UK
dc.identifier.citationMehmanparast A, Brennan F, Tavares I, Fatigue crack growth rates for offshore wind monopile weldments in air and seawater: SLIC inter-laboratory test results, Materials & Design, Volume 114, 15 January 2017, Pages 494–504en_UK
dc.identifier.issn0264-1275
dc.identifier.urihttp://dx.doi.org/10.1016/j.matdes.2016.10.070
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/11173
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectFatigue crack growthen_UK
dc.subjectMonopileen_UK
dc.subjectWeldmentsen_UK
dc.subjectOffshore winden_UK
dc.subjectHAZen_UK
dc.subjectBase metalen_UK
dc.titleFatigue crack growth rates for offshore wind monopile weldments in air and seawater: SLIC inter-laboratory test resultsen_UK
dc.typeArticleen_UK

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