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Acoustophoretic Polishing During Stereolithography 3D Printing of Viscoelastic Nanoparticle Suspensions

dc.contributor.authorLiu, Zheng
dc.contributor.chairShepherd, Robert F.
dc.contributor.committeeMemberPetersen, Kirstin Hagelskjaer
dc.date.accessioned2020-06-23T18:03:56Z
dc.date.available2022-01-17T07:00:26Z
dc.date.issued2019-12
dc.description28 pages
dc.descriptionSupplemental file(s) description: Code for the acoustic agitation.
dc.description.abstractIn this work, we report an acoustic agitation approach to enhance the flow of yield stress fluids during inverted projection stereolithography (SLA) 3D printing. The enhanced flow resulted in a reduction of “over-curing” of previously printed layers, with the overall effect of higher resolution printing during inverted SLA. To elucidate the mechanism of the enhanced flow, we numerically simulated the acousto-mechanical coupling in the SLA resin feed system at different agitation frequencies. From the simulations, the resulting acoustophoretic flow had a peak enhancement at 110 Hz. Using these results, we printed nanoparticle suspensions under acoustic agitation and compared their surface fidelity with the intended CAD attributes, as well as compared to a simple pseudoplastic fluid (no nanoparticles, no yield stress). The overall effect is that our acoustophoretic polishing improves the printed feature resolution by over 25% compared to the normal inverted SLA process for yield stress fluids.
dc.identifier.doihttps://doi.org/10.7298/8eym-p236
dc.identifier.otherLiu_cornell_0058O_10777
dc.identifier.otherhttp://dissertations.umi.com/cornell:10777
dc.identifier.urihttps://hdl.handle.net/1813/70126
dc.language.isoen
dc.subject3D Printing
dc.subjectAcoustophoretic
dc.subjectStereolithography
dc.subjectViscoelastic
dc.titleAcoustophoretic Polishing During Stereolithography 3D Printing of Viscoelastic Nanoparticle Suspensions
dc.typedissertation or thesis
dcterms.licensehttps://hdl.handle.net/1813/59810
thesis.degree.disciplineMechanical Engineering
thesis.degree.levelMaster of Science
thesis.degree.nameM.S., Mechanical Engineering

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