Experimental and numerical study of process-induced defects and their effect on fatigue debonding in composite joints

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dc.contributor.authorLiu, Yiding
dc.contributor.authorZhang, Xiang
dc.contributor.authorLemanski, Stuart
dc.contributor.authorYazdani Nezhad, Hamed
dc.contributor.authorAyre, David
dc.date.accessioned2019-04-01T13:19:26Z
dc.date.available2019-04-01T13:19:26Z
dc.date.issued2019-03-22
dc.description.abstractLaboratory coupon joints for fatigue debonding tests usually have narrow width and a through-width initial disbond. However, realistic structural joints are much wider and may contain process-induced defects and accidental damage; both are much smaller than the joint width. Small and discrete damage may behave differently from the idealised through-width disbond crack. This has brought a question on whether the laboratory coupon joint can accurately represent the fatigue behaviour of wider structural joints. This paper presents an experimental and numerical study of fatigue behaviour of a wide bonded lap joint with a process-induced defect of semi-circular shape. Fatigue debonding propagation was monitored by ultrasound inspection. Fatigue life was predicted using a normalised strain energy release rate parameter calculated by finite element method, and the adhesive material fatigue crack growth rate data measured under single and mixed mode conditions. Simulation of process-induced defect and validation by experiments have brought a better understanding of fatigue debonding behaviour in wide joints containing realistic damage. Suggestions are given for fatigue fracture tests of bonded joints.en_UK
dc.identifier.citationLiu Y, Zhang X, Lemanski S, et al., (2019) Experimental and numerical study of process-induced defects and their effect on fatigue debonding in composite joints. International Journal of Fatigue, Volume 125, August 2019, pp. 47-57en_UK
dc.identifier.cris23258428
dc.identifier.issn0142-1123
dc.identifier.urihttps://doi.org/10.1016/j.ijfatigue.2019.03.033
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/14025
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAdhesive bondingen_UK
dc.subjectDisbonden_UK
dc.subjectCompositesen_UK
dc.subjectFinite element analysisen_UK
dc.subjectFatigue life predictionen_UK
dc.titleExperimental and numerical study of process-induced defects and their effect on fatigue debonding in composite jointsen_UK
dc.typeArticleen_UK

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