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dc.contributor.authorSun, Li
dc.contributor.authorRen, Xiaobo
dc.contributor.authorHe, Jianying
dc.contributor.authorOlsen, Jim Stian
dc.contributor.authorPallaspuro, Sakari
dc.contributor.authorZhang, Zhiliang
dc.date.accessioned2020-11-24T12:47:00Z
dc.date.available2020-11-24T12:47:00Z
dc.date.created2019-09-23T11:40:02Z
dc.date.issued2019
dc.identifier.citationThe International Journal of Advanced Manufacturing Technology volume 105, pages 2415–2429(2019)en_US
dc.identifier.issn0268-3768
dc.identifier.urihttps://hdl.handle.net/11250/2689351
dc.description.abstractResidual stress in additive manufacturing (AM) is one of the key challenges in terms of structural integrity and finish quality of printed components. Estimating the residual stress distribution on additively manufactured components is complex and computationally expensive with full scale thermo-mechanical FE analysis. In this study, a point heat source is utilized to explore the thermal field and residual stress distribution during the manufacturing processes. Numerical results show that the residual stress at a single material point can be expressed as a function of its spatial position and the peak nodal temperature it has experienced during thermal cycles. The residual stress distribution can be divided into three segments according to the peak nodal temperature. The peak nodal temperature only depends on the heat flux and the distance to the point heat source center. A semi-analytical approach to predict the peak nodal temperature and residual stresses, once the heat flux is known, is proposed. The proposed approach is further validated by a numerical additive manufacturing model and a very good agreement is obtained. Compared to the thermo-mechanical FE model, the proposed method significantly improves the computational efficiency, showing great potential for residual stress prediction.en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.subjectPoint heat sourceen_US
dc.subjectResidual stressen_US
dc.subjectPeak nodal temperatureen_US
dc.subjectAdditive manufacturingen_US
dc.titleA new method to estimate the residual stresses in additive manufacturing characterized by point heat sourceen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionacceptedVersionen_US
dc.rights.holderThis is a post-peer-review, pre-copyedit version of an article. Locked until 30.10.20 due to copyright restrictions. The final authenticated version is available online at: https://doi.org/10.1007/s00170-019-04443-1en_US
dc.source.pagenumber2415–2429en_US
dc.source.volume105en_US
dc.source.journalThe International Journal of Advanced Manufacturing Technologyen_US
dc.identifier.doi10.1007/s00170-019-04443-1
dc.identifier.cristin1727733
dc.relation.projectNorges forskningsråd: 269558en_US
cristin.unitcode7401,80,64,0
cristin.unitnameMaterialer og nanoteknologi
cristin.ispublishedfalse
cristin.fulltextpostprint
cristin.qualitycode2


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