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dc.contributor.authorKristoffersen, Martin
dc.contributor.authorBørvik, Tore
dc.contributor.authorOlovsson, Lars
dc.date.accessioned2019-02-11T13:51:56Z
dc.date.available2019-02-11T13:51:56Z
dc.date.created2018-09-27T15:57:14Z
dc.date.issued2018
dc.identifier.isbn978-0-7918-5122-7
dc.identifier.urihttp://hdl.handle.net/11250/2584835
dc.description.abstractIn areas frequented by fishing vessels, trawl equipment or anchors may interfere with pipelines and cause damage through impact, potential hooking, and ensuing release of the pipeline. This load sequence of denting followed by global bending and springback results in a complex stress and strain history. Experiments have shown that fracture in an impacted pipe typically arises along the bottom of the dent, where the material suffers high compressive strains in the impact and hooking phase, and a rapid change to tension during the rebound phase. High compressive strains may reduce the strain to failure significantly for a succeeding tensile phase. A common trait of ductile damage models is to account for damage through nucleation, growth and coalescence of voids, which traditionally is thought to occur during tension. In this study, an uncoupled phenomenological Cockcroft-Latham-type fracture model accounting for anisotropic damage is used. The fracture model is implemented in the explicit finite element programme IMPETUS Afea Solver, and calibrated using material tests. Simulations show that the proposed fracture model is able to account for the observed behaviour.nb_NO
dc.language.isoengnb_NO
dc.publisherASMEnb_NO
dc.relation.ispartofASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering Volume 3: Structures, Safety, and Reliability
dc.titlePipeline Fracture due to Compression-Tension Loading Caused by Foreign Object Impactnb_NO
dc.title.alternativePipeline Fracture due to Compression-Tension Loading Caused by Foreign Object Impactnb_NO
dc.typeChapternb_NO
dc.description.versionpublishedVersionnb_NO
dc.identifier.doi10.1115/OMAE2018-77964
dc.identifier.cristin1615209
dc.description.localcodeCopyright © 2018 by ASMEnb_NO
cristin.unitcode194,64,45,0
cristin.unitnameInstitutt for konstruksjonsteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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