A viscoelastic model for evaluating extrusion-based print conditions

Chad Duty, Christine Ajinjeru, Vidya Kishore, Brett Compton, Nadim Hmeidat, Xun Chen, Peng Liu, Ahmed Arabi Hassen, John Lindahl, Vlastimil Kunc

Research output: Contribution to conferencePaperpeer-review

6 Scopus citations

Abstract

Extrusion-based printing systems have improved significantly over the past several years, allowing for higher throughput, higher temperatures, and larger components. At the same time, advanced materials are being introduced on the market that can provide improved performance over a range of operating conditions. Often these materials incorporate fiber reinforcements, reactive resins, and additives to control reaction kinetics, flow rheology, or thermal stability. This study presents a general framework for evaluating the printability of various candidate materials based on a basic viscoelastic model. The model addresses fundamental requirements for extrusion-based printing, including pressure-driven flow, bead formation, bead functionality, and component-level functionality. The effectiveness of this model for evaluating the impact of compositional variations and identifying appropriate processing conditions has been demonstrated for specific materials on direct write, fused filament fabrication, and large-scale extrusion platforms.

Original languageEnglish
Pages495-506
Number of pages12
StatePublished - 2020
Event28th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2017 - Austin, United States
Duration: Aug 7 2017Aug 9 2017

Conference

Conference28th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2017
Country/TerritoryUnited States
CityAustin
Period08/7/1708/9/17

Funding

A portion of the research was sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. A portion of the research was sponsored by Efficiency and Renewable Energy, Advanced 00OR22725 with UT-Battelle, LLC.

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