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dc.contributor.authorGrasso, Marzio
dc.contributor.authorAzzouz, Lyes
dc.contributor.authorRuiz-Hincapie, Paula
dc.contributor.authorZarrelli, Mauro
dc.contributor.authorRen, Guogang
dc.date.accessioned2018-12-21T15:02:48Z
dc.date.available2018-12-21T15:02:48Z
dc.date.issued2018-11-12
dc.identifier.citationGrasso , M , Azzouz , L , Ruiz-Hincapie , P , Zarrelli , M & Ren , G 2018 , ' Effect of Temperature on the Mechanical Properties of 3DPrinted PLA Tensile Specimens ' , Rapid Prototyping Journal , vol. 24 , no. 8 , pp. 1337-1346 . https://doi.org/10.1108/RPJ-04-2017-0055
dc.identifier.issn1355-2546
dc.identifier.otherPURE: 13391460
dc.identifier.otherPURE UUID: 20b667bd-46ea-4a44-90d9-074fc5f3de31
dc.identifier.otherScopus: 85055198239
dc.identifier.otherORCID: /0000-0001-8865-1526/work/62749450
dc.identifier.urihttp://hdl.handle.net/2299/20896
dc.description© Emerald Publishing Limited 2018
dc.description.abstractPurpose: Recent advancements of 3D printing technology have brought forward the interest for this technique in many engineering fields. This study aims to focus on mechanical properties of the polylactic acid (PLA) feeding material under different thermal conditions for a typical fusion deposition of 3D printer system. Design/methodology/approach: Specimens were tested under static loading within the range 20ºC to 60ºC considering different infill orientations. The combined effect of temperature and filament orientation is investigated in terms of constitutive material parameters and final failure mechanisms. The difference between feeding system before and post-3D printing was also assessed by mechanical test on feeding filament to verify the thermal profile during the deposition phase. Findings: The results in terms of Young’s modulus, ultimate tensile strength (UTS), strain at failure (εf) and stress at failure (σf) are presented and discussed to study the influence of process settings over the final deposited material. Fracture surfaces have been investigated using an optical microscope to link the phenomenological interpretation of the failure with the micro-mechanical behaviour. Experimental results show a strong correlation between stiffness and strength with the infill orientation and the temperature values. Moreover, a relevant effect is related to deformed geometry of the filament approaching glass transition region of the polymer according to the deposition orientation. Research limitations/implications: The developed method can be applied to optimise the stiffness and strength of any 3D-printed composite according to the infill orientation. Practical implications: To avoid the failure of specimens outside the gauge length, a previously proposed modification to the geometry was adopted. The geometry has a parabolic profile with a curvature of 1,000 mm tangent to the middle part of the specimen. Originality/value: Several authors have reported the stiffness and strength of 3D-printed parts under static and ambient temperature for different build parameters. However, there is a lack of literature on the combination of the latter with the temperature effects on the mechanical properties which this paper covers.en
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofRapid Prototyping Journal
dc.rightsEmbargoed
dc.subject3D printing
dc.subjectFractography
dc.subjectGlass transition
dc.subjectPLA
dc.subjectThermo-mechanical properties
dc.subjectMechanical Engineering
dc.subjectIndustrial and Manufacturing Engineering
dc.titleEffect of Temperature on the Mechanical Properties of 3DPrinted PLA Tensile Specimensen
dc.contributor.institutionSchool of Engineering and Technology
dc.contributor.institutionCentre for Engineering Research
dc.contributor.institutionMaterials and Structures
dc.contributor.institutionEnergy and Sustainable Design
dc.contributor.institutionBioEngineering
dc.description.statusPeer reviewed
dc.date.embargoedUntil2019-11-12
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85055198239&partnerID=8YFLogxK
dc.relation.schoolSchool of Engineering and Technology
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2018-11-12
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1108/RPJ-04-2017-0055
rioxxterms.licenseref.startdate2019-11-12
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.date.embargo2019-11-12
herts.rights.accesstypeEmbargoed


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