Presentation Type

Poster

Start Date

5-8-2024 11:00 AM

End Date

5-8-2024 1:00 PM

Subjects

Additive manufacturing, Microscopy, Materials science

Advisor

Dr. Alexander Hunt

Student Level

Doctoral

Abstract

Fused deposition modeling (FDM) is an additive manufacturing (AM) process which can create parts with complex geometries in their final shape without need for additional specialized tools or devices. The FDM process builds parts by adding material layer by layer only where it is needed, saving energy, costs, production time for complex parts, and minimizing waste. Fiber reinforcement can significantly enhance the mechanical properties of a polymer material and depends significantly on the fiber length distribution and fiber orientation distribution of the final part. In this research, we investigated the various infill patterns of FDM printed Markforged onyx which is a nylon filament samples with chopped up carbon fiber (CF) reinforcement. The effects of printing parameters of the FDM samples was then characterized through material strength testing, optical microscopy, and electron microscopy to investigate the relation to surface morphology, microstructure, and void fractions. Investigating and optimizing the adhesion between polymer matrices and carbon fibers has the potential to provide significant impacts on the utility that different materials reinforced with chopped carbon fibers produced by FDM may have in manufacturing.

Creative Commons License or Rights Statement

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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May 8th, 11:00 AM May 8th, 1:00 PM

Characterization of Chopped Carbon Fiber Reinforced Composites Produced Using Fused Deposition Modeling

Fused deposition modeling (FDM) is an additive manufacturing (AM) process which can create parts with complex geometries in their final shape without need for additional specialized tools or devices. The FDM process builds parts by adding material layer by layer only where it is needed, saving energy, costs, production time for complex parts, and minimizing waste. Fiber reinforcement can significantly enhance the mechanical properties of a polymer material and depends significantly on the fiber length distribution and fiber orientation distribution of the final part. In this research, we investigated the various infill patterns of FDM printed Markforged onyx which is a nylon filament samples with chopped up carbon fiber (CF) reinforcement. The effects of printing parameters of the FDM samples was then characterized through material strength testing, optical microscopy, and electron microscopy to investigate the relation to surface morphology, microstructure, and void fractions. Investigating and optimizing the adhesion between polymer matrices and carbon fibers has the potential to provide significant impacts on the utility that different materials reinforced with chopped carbon fibers produced by FDM may have in manufacturing.