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| Performance and Applications of 3D Printed Continuous Fiber-Reinforced Thermosetting Composites |
| MING Yueke 1, 2, 3, WANG Ben 1, 2, 3, ZHOU Jin 1, 2, 3, XIN Zhibo 1, 2, 3, LI Ting2 , WANG Feng2 , DUAN Yugang 1, 2, 3 |
| (1. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710054, China; 2. Xi’an Jiaotong University, Xi’an 710049, China; 3. iHarbour Academy of Frontier Equipment, Xi’an Jiaotong University, Xi’an 710115, China) |
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Abstract The development status and technical bottlenecks of 3D printed continuous fiber-reinforced thermosetting composites were reviewed in this paper. Based on the preliminary experimental research, a two-step 3D printing solution was proposed, including fiber impregnation and printing, and post-curing. The continuous carbon fiber (CCF) reinforced thermosetting epoxy (EP) samples were prepared by 3D printing. The mechanical test results show that the tensile strength and modulus of 3D printed CCF/EP samples were (1257±71) MPa and (96±11) GPa, respectively; the flexural strength and modulus were (965±80) MPa and (75±7) GPa, respectively; the interlaminar shear strength was (92±3) MPa. The microscopic fiber-resin bonding, distribution, and internal void defects were also discussed. Furthermore, complex structures reinforced by different fibers were fabricated to demonstrate the feasibility and generality of the proposed technique. Finally, the application prospect of 3D printed CCF/EP mesh in the field of self-heating and deicing was explored. These results pave the way for the digital manufacturing of high-performance thermosetting composites through 3D printing and demonstrate their great potential in advanced industrial applications.
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2021, 
