About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Analysis of Fiber Orientation and Concentration in Large Scale Polymer Composite Deposition of Carbon Fiber-reinforced Thermoplastics |
Author(s) |
Neshat Sayah, Douglas Earl Smith |
On-Site Speaker (Planned) |
Neshat Sayah |
Abstract Scope |
Materials produced with Large Area Additive Manufacturing (LAAM) are significantly enhanced through the addition of short carbon fibers to the polymer matrix. Carbon fiber reinforced composites are used in LAAM due to their lightweight, favorable mechanical properties, multifunctional application, and low manufacturing costs. The thermomechanical, mechanical, and electrical properties of the 3D printed composite are highly dependent on the distribution and orientation of the suspended carbon fibers which are defined by the polymer deposition manufacturing process. This study aims to gain a better understanding of fiber orientation and fiber concentration within the microstructure of a LAAM bead. High-resolution-3D micro-computed tomography (CT) is used to evaluate porosity, fiber migration, and fiber orientation. Measured results are used to validate predictions of the same for simple LAAM extrusion flows. Preliminary results will focus on the microstructure within a single bead and during the flow process upstream of the polymer composite deposition event. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |