| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Effects of Fiber Alignment on the Thermomechnical Properties of Large-format Printed Composite Polymer Structures |
| Author(s) |
Tyler Corum, Vipin Kumar, Ahmed Hassen, Chad Duty |
| On-Site Speaker (Planned) |
Tyler Corum |
| Abstract Scope |
Large-format additive manufacturing (LFAM) was used in this study to create a fiber reinforced structure made from 20% by weight carbon fiber reinforced acrylonitrile butadiene styrene (CF-ABS). While adding fiber reinforcements does increase stiffness and reduce the coefficient of thermal expansion (CTE) of LFAM prints, the final structure exhibits highly anisotropic thermomechanical properties. Fibers are shear aligned by the print nozzle during the extrusion process and the resulting bead has highly aligned edges or skin areas and a randomly aligned center. Since fiber reinforcements provide more resistance to thermal expansion in the longitudinal direction than the transverse, the orientation of these fibers in the print influences the CTE experienced by the structure at elevated temperatures. This study used X-ray computed tomography (X-CT) and digital image correlation (DIC) to correlate the degree of fiber alignment to the thermal expansion of LFAM structures by serial sectioning printed beads. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |