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http://dx.doi.org/10.7234/composres.2022.35.6.463

Effect of Post-processing on Mechanical Properties of 3D Printed Carbon Chopped Fiber Reinforced Composites  

Jia-le, Che (School of Mechanical Engineering, Chung-Ang University)
Seung-Hwan, Chang (School of Mechanical Engineering, Chung-Ang University)
Publication Information
Composites Research / v.35, no.6, 2022 , pp. 463-468 More about this Journal
Abstract
The high porosity of the infill pattern of carbon chopped fiber-reinforced Nylon composite structures fabricated by the fused filament fabrication (FFF) type 3D printers determines the mechanical performance of the printed structures. This study experimentally evaluated the mechanical performance of Onyx composite specimens fabricated with a rectangular infill structure under the hot-pressing condition to improve the mechanical properties by reducing the porosity of the infill pattern of the printed structure, and evaluated the best mechanical performance. The hot-pressing conditions (145℃, 4 MPa, 12 min) that induce the most appropriate mechanical properties were found. As a result of microscopic observation, it was confirmed that the infill porosity of the composite specimens subjected to post hot-pressing treatment was effectively reduced. In order to confirm the mechanical performance of the post-treated specimen, a tensile test and a three-point bending test were performed with a control specimen without post-treatment and a specimen printed with the same density and dimensions after post-treatment to evaluate the mechanical properties. As a result of comparison, it was confirmed that the mechanical properties were effectively improved when the post-treatment of hot-pressing was performed.
Keywords
3D printing; Hot-pressing; Infill pattern; Mechanical properties;
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Times Cited By KSCI : 5  (Citation Analysis)
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