Influence of Stress States on Cleavage Fracture in X70 Pipeline Steels

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorShen, Fuhuien_US
dc.contributor.authorPan, Boyuen_US
dc.contributor.authorWang, Shufanen_US
dc.contributor.authorLian, Junheen_US
dc.contributor.authorMünstermann, Sebastianen_US
dc.contributor.departmentDepartment of Mechanical Engineeringen
dc.contributor.groupauthorAdvanced Manufacturing and Materialsen
dc.contributor.organizationRWTH Aachen Universityen_US
dc.date.accessioned2022-09-07T08:48:52Z
dc.date.available2022-09-07T08:48:52Z
dc.date.issued2022-09en_US
dc.description.abstractStress state is a primary factor controlling the ductile fracture behavior of steels, which is typically represented as the combination of the stress triaxiality and Lode angle parameter. The cleavage fracture properties of pipeline steels at low temperatures are usually assessed under plane strain conditions, such as using the fracture mechanics experiments. In this study, the cleavage fracture properties of a X70 steel at liquid nitrogen temperature (-196 °C) are characterized over a broad range of stress states. A comprehensive experimental program is carried out by performing tensile tests using various flat specimens of different geometries immersed in liquid nitrogen, including shear, central hole, notched dog bone, and side grooved plane strain. Pronounced plasticity occurs prior to the final fracture within the tested range of stress states at the very low temperature. Anisotropy effects are considered by conducting tensile tests of fracture specimens along the rolling, diagonal and transverse directions. Finite element simulations of corresponding experiments are performed using an evolving quadratic plasticity model to extract the local stress state variables to establish the fracture criteria, which are formulated based on the critical values of plastic strain and maximum principal stress. The fracture strain of the investigated material at liquid nitrogen temperature is affected by the stress triaxiality, Lode angle parameter and loading direction.en
dc.description.versionPeer revieweden
dc.format.extent6
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationShen, F, Pan, B, Wang, S, Lian, J & Münstermann, S 2022, ' Influence of Stress States on Cleavage Fracture in X70 Pipeline Steels ', Journal of Pipeline Science and Engineering, vol. 2, no. 3, 100072 . https://doi.org/10.1016/j.jpse.2022.100072en
dc.identifier.doi10.1016/j.jpse.2022.100072en_US
dc.identifier.issn2667-1433
dc.identifier.otherPURE UUID: d93adda6-2609-4153-82cc-6253131924a4en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/d93adda6-2609-4153-82cc-6253131924a4en_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/87223445/1_s2.0_S2667143322000440_main.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/116596
dc.identifier.urnURN:NBN:fi:aalto-202209075406
dc.language.isoenen
dc.publisherKe Ai Publishing Communications Ltd.
dc.relation.ispartofseriesJournal of Pipeline Science and Engineeringen
dc.relation.ispartofseriesVolume 2, issue 3en
dc.rightsopenAccessen
dc.subject.keywordstress triaxialityen_US
dc.subject.keywordcleavage fractureen_US
dc.subject.keywordplasticityen_US
dc.subject.keywordanisotrophyen_US
dc.titleInfluence of Stress States on Cleavage Fracture in X70 Pipeline Steelsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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