Acoustophoretic Polishing During Stereolithography 3D Printing of Viscoelastic Nanoparticle Suspensions
| dc.contributor.author | Liu, Zheng | |
| dc.contributor.chair | Shepherd, Robert F. | |
| dc.contributor.committeeMember | Petersen, Kirstin Hagelskjaer | |
| dc.date.accessioned | 2020-06-23T18:03:56Z | |
| dc.date.available | 2022-01-17T07:00:26Z | |
| dc.date.issued | 2019-12 | |
| dc.description | 28 pages | |
| dc.description | Supplemental file(s) description: Code for the acoustic agitation. | |
| dc.description.abstract | In 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.doi | https://doi.org/10.7298/8eym-p236 | |
| dc.identifier.other | Liu_cornell_0058O_10777 | |
| dc.identifier.other | http://dissertations.umi.com/cornell:10777 | |
| dc.identifier.uri | https://hdl.handle.net/1813/70126 | |
| dc.language.iso | en | |
| dc.subject | 3D Printing | |
| dc.subject | Acoustophoretic | |
| dc.subject | Stereolithography | |
| dc.subject | Viscoelastic | |
| dc.title | Acoustophoretic Polishing During Stereolithography 3D Printing of Viscoelastic Nanoparticle Suspensions | |
| dc.type | dissertation or thesis | |
| dcterms.license | https://hdl.handle.net/1813/59810 | |
| thesis.degree.discipline | Mechanical Engineering | |
| thesis.degree.level | Master of Science | |
| thesis.degree.name | M.S., Mechanical Engineering |