期刊
COMPOSITE STRUCTURES
卷 266, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2021.113815
关键词
Tensile test; Bending test; Reinforcement; 3D-printed composites; Carbon fiber
资金
- Tokyo Institute of Technology [1102202000000000101baeaem2002116]
This study proposes a simple method to reinforce the lay-up direction of 3D-printed composites. By inserting a reinforcing bar with continuous carbon fibers into a through hole and applying a large electric current to melt the bar and fuse it to the part, the stiffness and strength of the part are effectively increased.
In recent times, 3D printers have been employed to fabricate continuous fiber composites. The 3D-printed composites fabricated via fused filament fabrication have no reinforcing fibers in the lay-up direction, resulting in low stiffness and strength in this direction. In the present study, a simple method to reinforce the lay-up direction of 3D-printed composites is proposed. First, a composite part with a through rectangular hole is fabricated via 3D printing. A rectangular reinforcing bar with continuous carbon fibers is then printed separately. Subsequently, the reinforcing bar is inserted into the through hole. A large electric current is applied to the carbon fibers in the reinforcing bar, and the surface thermoplastic polymer is melted via resistive heating (self-heating). As a result, the bar becomes fused to the part, which increases the stiffness and strength of the part. Tensile test and bending test specimens in the lay-up direction were fabricated using commercially available 3D printers. The results show that the simple reinforcing method effectively improves the mechanical properties of the part in the lay-up direction.
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