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dc.date.accessioned2013-11-21T11:05:02Z
dc.date.available2013-11-21T11:05:02Z
dc.date.issued2013en_US
dc.date.submitted2013-06-05en_US
dc.identifier.citationRotwitt, Preben Brekke. Fatigue life extension using composite patch repairs. Masteroppgave, University of Oslo, 2013en_US
dc.identifier.urihttp://hdl.handle.net/10852/37741
dc.description.abstractThe main objective of the present thesis was to study how composite patches can reduce the stress intensity in cracked steel plates, and how these patches, by reducing the stress intensity, can limit the extent of fatigue crack growth. Two different cases have been analysed using the finite element software Abaqus; a single-edge notched tension steel plate and a ship manhole experiencing fatigue crack growth. The former has been modelled and analysed with a number of patch configurations with varying thickness, width and placement along the crack line. The latter has been modelled and analysed with two patch repair alternatives; first, with double sided CFRP strengthening of the cracked deck and then a single CFRP patch inside the rim of the manhole. For both alternatives fatigue life calculations has been made. The results shows that composite patch repair solutions are, when applied in the right manner, well suited for preventing fatigue crack growth and extending the fatigue life of cracked plates. Additionally, it is shown that the composite thickness and especially the width have considerable influence on the performance of the patches.eng
dc.language.isoengen_US
dc.titleFatigue life extension using composite patch repairsen_US
dc.typeMaster thesisen_US
dc.date.updated2013-11-15en_US
dc.creator.authorRotwitt, Preben Brekkeen_US
dc.subject.nsiVDP::413en_US
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Rotwitt, Preben Brekke&rft.title=Fatigue life extension using composite patch repairs&rft.inst=University of Oslo&rft.date=2013&rft.degree=Masteroppgaveen_US
dc.identifier.urnURN:NBN:no-39769
dc.type.documentMasteroppgaveen_US
dc.identifier.duo182320en_US
dc.contributor.supervisorBrian Hayman (UiO), Jan Weitzenböck (DVN)en_US
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/37741/2/Rotwitt-master.pdf


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