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 |
A Comparative Study of Extrusion Deposition of Long and Continuous Carbon Fiber Reinforced Composites for Large-scale Additive Manufacturing |
Author(s) |
Aditya Thakur, John Pappas, Ming C Leu, Xiangyang Dong |
On-Site Speaker (Planned) |
Xiangyang Dong |
Abstract Scope |
Large-scale additive manufacturing (LSAM) of carbon fiber reinforced composites (CFRC) has recently gained much interest in fabricating large-format components with good mechanical strength. A comparative investigation of extrusion deposition of long- and continuous-CFRC was performed due to their potentials in further improvement of mechanical properties. Thermoplastic pellets and continuous carbon fiber tows were directly used as feedstock materials in the proposed method. The printability and microstructure including fiber length, distribution and orientation as well as porosity were characterized and compared. Mechanical properties were also measured for all printed samples. With an average fiber length of 20.1 mm, larger than critical fiber length, and highly oriented fiber distribution, long-CFRC exhibited a flexural modulus value nearly comparable to that of continuous-CFRC while its flexural strength was slightly lower than that of continuous-CFRC. The feasibility of the proposed method for LSAM was further demonstrated in fabrication of large-format CFRC components with complex geometries. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |