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dc.contributor.authorLanzotti, Antonio
dc.contributor.authorGrasso, Marzio
dc.contributor.authorStaiano, Gabriele
dc.contributor.authorMartorelli, Massimo
dc.identifier.citationLanzotti , A , Grasso , M , Staiano , G & Martorelli , M 2015 , ' The impact of process parameters on mechanical properties of parts fabricated in PLA with an open-source 3-D printer ' , Rapid Prototyping Journal , vol. 21 , no. 5 , pp. 604-617 .
dc.identifier.otherPURE: 9775440
dc.identifier.otherPURE UUID: 16d3b31b-5b69-4bbf-8e80-57d4f6f1eda4
dc.identifier.otherScopus: 84940525052
dc.description.abstractPurpose - This study aims to quantify the ultimate tensile strength and the nominal strain at break (f) of printed parts made from polylactic acid (PLA) with a Replicating Rapid prototyper (Rep-Rap) 3D printer, by varying three important process parameters: layer thickness, infill orientation and the number of shell perimeters. Little information is currently available about mechanical properties of parts printed using open-source, low-cost 3D printers. Design/methodology/approach - A computer-aided design model of a tensile test specimen was created, conforming to the ASTM:D638. Experiments were designed, based on a central composite design. A set of 60 specimens, obtained from combinations of selected paramers, was printed on a Rep-Rap Prusa I3 in PLA. Testing was performed using a JJ Instruments - T5002-type tensile testing machine and the load was measured using a load cell of 1,100 N. Findings - This study investigated the main impact of each process parameter on mechanical properties and the effects of interactions. The use of a response surface methodology allowed the proposition of an empirical model which connects process parameters and mechanical properties. Even though results showed a high variability, additional ideas on how to understand the impact of process parameters are suggested in this paper. Originality/value - On the basis of experimental results, it is possible to obtain practical suggestions to set common process parameters in relation to mechanical properties. Experiments discussed in the present paper provide a variety of data and insight regarding the relationship among the main process parameters and the stiffness and strength of fused deposition modeling-printed parts made from PLA. In particular, this paper underlines the shortage in existing literature concerning the impact of process parameters on the elastic modulus and the strain to failure for the PLA. The experimental data produced show a good degree of compliance with analytical formulations and other data found in literature.en
dc.relation.ispartofRapid Prototyping Journal
dc.subjectCentral composite design
dc.subjectNominal strain at break
dc.subjectOpen-source 3D printers
dc.subjectPolylactic acid
dc.subjectProcess improvement
dc.subjectUltimate tensile strength
dc.subjectIndustrial and Manufacturing Engineering
dc.subjectMechanical Engineering
dc.titleThe impact of process parameters on mechanical properties of parts fabricated in PLA with an open-source 3-D printeren
dc.contributor.institutionSchool of Engineering and Technology
dc.contributor.institutionMaterials and Structures
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

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