Experimental and numerical penetration response of laser-welded stiffened panels

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Kõrgesaar, Mihkel
dc.contributor.author Romanoff, Jani
dc.contributor.author Remes, Heikki
dc.contributor.author Palokangas, Pekka
dc.date.accessioned 2018-02-09T09:53:08Z
dc.date.available 2018-02-09T09:53:08Z
dc.date.issued 2018-04-01
dc.identifier.citation Kõrgesaar , M , Romanoff , J , Remes , H & Palokangas , P 2018 , ' Experimental and numerical penetration response of laser-welded stiffened panels ' International Journal of Impact Engineering , vol 114 , pp. 78-92 . DOI: 10.1016/j.ijimpeng.2017.12.014 en
dc.identifier.issn 0734-743X
dc.identifier.issn 1879-3509
dc.identifier.other PURE UUID: 0c45a153-1574-4013-8cf9-ccc23bd42798
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/experimental-and-numerical-penetration-response-of-laserwelded-stiffened-panels(0c45a153-1574-4013-8cf9-ccc23bd42798).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85038830250&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/17016457/Korgesaar_etal_IJIE_114_78.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/29731
dc.description.abstract Ductile fracture in large structures is often resolved with non-linear finite element (FE) simulations employing structural shell elements which are larger than localization zone. This makes solution element size dependent and calibration of material parameters complex. Therefore, the paper explores the ability of numerical simulations to capture the penetration resistance of stiffened panels after determining steel material fracture ductility at different stress states. The numerical simulations are compared with experiments performed with rigidly fixed 1.2 m square panels penetrated with half-sphere indenter until fracture took place. Response of the panels was measured in terms of indentation force versus indenter displacement. In parallel, tensile tests were performed with four different flat specimens extracted from the face sheet of panels to characterize the material fracture ductility at different stress states. Panel simulations were performed with two fracture criteria: one calibrated based on the test data from dog-bone specimen and other calibrated based on the data from all tensile tests. To evaluate the fracture criteria in terms of their capacity to handle mesh size variations, mesh size was varied from fine to coarse. Results suggest that fracture criterion calibrated based on the range of stress states can handle mesh size variations more effectively as displacement to fracture showed considerably weaker mesh size dependence. en
dc.format.extent 15
dc.format.extent 78-92
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries International Journal of Impact Engineering en
dc.relation.ispartofseries Volume 114 en
dc.rights openAccess en
dc.subject.other Civil and Structural Engineering en
dc.subject.other Automotive Engineering en
dc.subject.other Aerospace Engineering en
dc.subject.other Safety, Risk, Reliability and Quality en
dc.subject.other Ocean Engineering en
dc.subject.other Mechanics of Materials en
dc.subject.other Mechanical Engineering en
dc.subject.other 214 Mechanical engineering en
dc.title Experimental and numerical penetration response of laser-welded stiffened panels en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Mechanical Engineering
dc.contributor.department Alten Finland
dc.subject.keyword Ductile fracture
dc.subject.keyword Fracture simulations
dc.subject.keyword Panel indentation
dc.subject.keyword Stiffened panel
dc.subject.keyword Tensile testing
dc.subject.keyword Civil and Structural Engineering
dc.subject.keyword Automotive Engineering
dc.subject.keyword Aerospace Engineering
dc.subject.keyword Safety, Risk, Reliability and Quality
dc.subject.keyword Ocean Engineering
dc.subject.keyword Mechanics of Materials
dc.subject.keyword Mechanical Engineering
dc.subject.keyword 214 Mechanical engineering
dc.identifier.urn URN:NBN:fi:aalto-201802091227
dc.identifier.doi 10.1016/j.ijimpeng.2017.12.014
dc.type.version publishedVersion

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