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dc.contributorUniversitat Ramon Llull. IQS
dc.contributor.authorGarcía Granada, Andrés-Amador
dc.contributor.authorReyes Pozo, Guillermo
dc.contributor.authorGómez Gras, Giovanni
dc.contributor.authorPuigoriol Forcada, Josep Maria
dc.contributor.authorSalazar Martín, A.G.
dc.date.accessioned2022-02-09T13:15:14Z
dc.date.accessioned2023-07-13T05:45:27Z
dc.date.available2022-02-09T13:15:14Z
dc.date.available2023-07-13T05:45:27Z
dc.date.issued2020-03
dc.identifier.urihttp://hdl.handle.net/20.500.14342/1094
dc.description.abstractThe Fused-Deposition Modelling (FDM) technique has transformed the manufacturing discipline by simplifying operational processes and costs associated with conventional technologies, with polymeric materials being indispensable for the development of this technology. A lack of quantification of viscoelastic/plastic behavior has been noted when addressing FDM parts with Polyetherimide (PEI), which is currently being investigated as a potential material to produce functional end-products for the aerospace and health industry. Primary and secondary creep along with stress relaxation tests have been conducted on FDM PEI specimens by applying stresses from 10 to 40 MPa for 100 to 1000 min. Specimens were 3D printed by varying the part build orientation, namely XY, YZ, and XZ. Creep results were fitted to the Generalized Time Hardening equation (GTH), and then this model was used to predict stress relaxation behavior. FDM PEI parts presented an isotropic creep and stress relaxation performance. The GTH model was proven to have a significant capacity to fit viscoelastic/plastic performances for each single build orientation (r > 0.907, p < 0.001), as well as a tight prediction of the stress relaxation behavior (r > 0.998, p < 0.001). Averaged-orientation coefficients for GTH were also closely correlated with experimental creep data (r > 0.958, p < 0.001) and relaxation results data (r > 0.999, p < 0.001). FDM PEI parts showed an isotropic time-dependent behavior, which contrasts with previous publications arguing the significant effect of part build orientation on the mechanical properties of FDM parts. These findings are strengthened by the high correlation obtained between the experimental data and the averaged-coefficient GTH model, which has been proven to be a reliable tool to predict time-dependent performance in FDM parts.eng
dc.format.extent16 p.cat
dc.language.isoengcat
dc.publisherMDPIcat
dc.relation.ispartofMolecules. Vol.12, n.3 (2020), 678cat
dc.rightsAttribution 4.0 International
dc.rights© L'autor/a
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceRECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.otherControl de processos químicscat
dc.subject.otherTermoplàstics--Propietats mecàniquescat
dc.subject.otherCreepcat
dc.subject.otherStress relaxationcat
dc.subject.otherFused deposition modellingcat
dc.subject.otherPolyetherimidecat
dc.subject.otherProcess parameterscat
dc.subject.otherMathematical characterizationcat
dc.subject.otherGeneralized time hardening modelcat
dc.titleTime-dependent mechanical properties in polyetherimide 3D-Printed parts are dictated by isotropic performance being accurately predicted by the generalized time hardening modelcat
dc.typeinfo:eu-repo/semantics/articlecat
dc.typeinfo:eu-repo/semantics/publishedVersioncat
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapcat
dc.subject.udc54
dc.subject.udc62
dc.identifier.doihttps://doi.org/10.3390/polym12030678cat


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