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dc.contributor.authorChiumenti, Michèle
dc.contributor.authorCervera Ruiz, Miguel
dc.contributor.authorAgelet de Saracibar Bosch, Carlos
dc.contributor.authorDialami, Narges
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria
dc.date.accessioned2013-07-23T13:57:51Z
dc.date.created2013
dc.date.issued2013
dc.identifier.citationChiumenti, M. [et al.]. A novel stress-accurate FE technology for highly non-linear analysis with incompressibility constraint: application to the numerical simulation of the FSW process. A: International Conference on Numerical Methods in Industrial Forming Processes. "The 11th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM2013: Shenyang, China, 6-10 July 2013". Shenyang: American Institute of Physics (AIP), 2013, p. 45-56.
dc.identifier.isbn978-0-7354-1156-2
dc.identifier.urihttp://hdl.handle.net/2117/19984
dc.description.abstractIn this work a novel finite element technology based on a three-field mixed formulation is presented. The Variational Multi Scale (VMS) method is used to circumvent the LBB stability condition allowing the use of linear piece-wise interpolations for displacement, stress and pressure fields, respectively. The result is an enhanced stress field approximation which enables for stress-accurate results in nonlinear computational mechanics. The use of an independent nodal variable for the pressure field allows for an adhoc treatment of the incompressibility constraint. This is a mandatory requirement due to the isochoric nature of the plastic strain in metal forming processes. The highly non-linear stress field typically encountered in the Friction Stir Welding (FSW) process is used as an example to show the performance of this new FE technology. The numerical simulation of the FSW process is tackled by means of an Arbitrary-Lagrangian-Eulerian (ALE) formulation. The computational domain is split into three different zones: the work.piece (defined by a rigid visco-plastic behaviour in the Eulerian framework), the pin (within the Lagrangian framework) and finally the stirzone (ALE formulation). A fully coupled thermo-mechanical analysis is introduced showing the heat fluxes generated by the plastic dissipation in the stir-zone (Sheppard rigid-viscoplastic constitutive model) as well as the frictional dissipation at the contact interface (Norton frictional contact model). Finally, tracers have been implemented to show the material flow around the pin allowing a better understanding of the welding mechanism. Numerical results are compared with experimental evidence.
dc.format.extent12 p.
dc.language.isoeng
dc.publisherAmerican Institute of Physics (AIP)
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Processos de fabricació mecànica
dc.subject.lcshFriction stir welding
dc.subject.otherfinite element analysis
dc.subject.otherforming processes
dc.subject.otherfriction welding
dc.subject.otherinterpolation
dc.subject.othermechanical contact
dc.subject.otherpiecewise linear techniques
dc.subject.othershear modulus
dc.subject.otherstress analysis
dc.subject.othersurface treatment
dc.subject.otherthermomechanical treatment
dc.subject.otherviscoplasticity
dc.titleA novel stress-accurate FE technology for highly non-linear analysis with incompressibility constraint: application to the numerical simulation of the FSW process
dc.typeConference report
dc.subject.lemacSoldadura per fricció
dc.contributor.groupUniversitat Politècnica de Catalunya. (MC)2 - Grup de Mecànica Computacional en Medis Continus
dc.identifier.doi10.1063/1.4806808
dc.relation.publisherversionhttp://proceedings.aip.org/resource/2/apcpcs/1532/1/45_1
dc.rights.accessRestricted access - publisher's policy
drac.iddocument12662824
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
upcommons.citation.authorChiumenti, M.; Cervera, M.; Agelet De Saracibar, C.; Dialami, N.
upcommons.citation.contributorInternational Conference on Numerical Methods in Industrial Forming Processes
upcommons.citation.pubplaceShenyang
upcommons.citation.publishedtrue
upcommons.citation.publicationNameThe 11th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM2013: Shenyang, China, 6-10 July 2013
upcommons.citation.startingPage45
upcommons.citation.endingPage56


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