| About this Abstract |
| Meeting |
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Symposium
|
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Presentation Title |
Meshfree Models for Viscoelastic Filament Extrusion and Solidification |
| Author(s) |
Eric Palermo, Thomas O'Connor |
| On-Site Speaker (Planned) |
Eric Palermo |
| Abstract Scope |
We demonstrate RHEO – a new opensource meshfree framework for modeling multiphase viscoelastic hydrodynamics – by simulating a filament extrusion printing process. RHEO combines reproducing-kernel smooth particle hydrodynamics (RK-SPH) for viscoelastic fluids with a bonded-particle method (BPM) for elastic solids. This hybrid setup allows RHEO to model the flow of cooling polymer filaments, their temperature induced solidification, and subsequent remelting on later heating. We demonstrate this by showing results for the cooling and solidification of a molten filament deposited onto a cool substrate and predict how filament cross-sections vary with polymer viscoelasticity, thermal properties, and extrusion rate. We also demonstrate RHEO’s ability to capture the effects of remelting on filament cross sections by modeling the deposition of a second filament row on top of the first. While idealized, these demonstrations highlight RHEO’s ability to model a variety of multiphase free-surface flows relevant to both polymer and metal additive manufacturing. |
| Proceedings Inclusion? |
Undecided |