About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
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Physical Modeling
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Presentation Title |
Finite element simulation of direct deposition additive manufacturing for fiber reinforced thermoplastics |
Author(s) |
Zhaogui Wang, Douglas E. Smith |
On-Site Speaker (Planned) |
Zhaogui Wang |
Abstract Scope |
Non-planar polymer direct deposition additive manufacturing has recently seen increased attention from industries, where the molten plastics beads are extruded through a heated nozzle directly into three-dimensional space to form lightweight truss-like structures. This promising method shortens the time of manufacturing and can produce structures without the stair effect appearance that occurs in traditional layered additive manufacturing processes. This paper investigates the flow dynamics of fiber reinforced thermoplastics melt during a direct deposition process. A vertical extrudate of polymer melt is modelled through the finite element method, where a non-Newtonian transient flow model is developed for this process. A quasi steady state for the deposition flow may be achieved, where the fiber orientation induced by the flow is evaluated through the Folgar-Tucker isotropic rotary diffusion model with the orthotropic-fitted closure approximation. Computed results indicate that fibers within the vertically deposited bead tend to highly align along the direction of extrusion. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |