3D打印连续碳纤维增强尼龙复合预浸丝材制备工艺研究OA
Fabrication process research of 3D-printed continuous carbon fiber reinforced nylon composite prepreg filaments
为了提高连续纤维增强热塑性复合材料在增材制造技术中的树脂浸渍性能并降低孔隙率,实现打印样件力学性能增强,本研究采用热力耦合工艺制备了连续碳纤维/尼龙 6(CCF/PA6)预浸丝材,采用正交试验设计不同的工艺参数组别,并通过对不同正交组别的拉伸性能、结晶度、微观形貌以及孔隙率进行极差分析,得出不同性能的最佳成型工艺参数.结果表明,经充分浸渍的预浸丝材拉伸强度可达691.37 MPa,最大结晶度为31.91%,最小孔隙率为1.28%.同时,采用最优工艺参数下的预浸丝材进行 FDM 打印工艺验证,通过力学试验和弯曲样件断裂面微观形貌对打印样件性能进行分析.结果表明,较低的打印层厚、较小的道间距以及较高的打印温度可提高打印样件的力学性能.
To enhance the resin impregnation efficiency and reduce porosity in continuous fiber-reinforced ther-moplastic composites for additive manufacturing,thereby improving the mechanical properties of printed parts,this study employed a thermo-mechanical coupled process to fabricate continuous carbon fiber/nylon(CCF/PA6)prepreg filaments.Orthogonal experimental design was adopted to evaluate different parameter combinations,followed by range analysis of tensile properties,crystallinity,micromorphology,and porosity to determine the optimal forming parameters for different performance levels.Results demonstrated that fully impregnated filaments achieved a tensile strength of 691.37 MPa,a maximum crystallinity of 31.91%,and a minimum porosity of 1.28%.Furthermore,FDM printing validation using the optimized filaments revealed that lower layer thickness,reduced road spacing,and higher printing temperature significantly improved the mechanical performance of printed specimens,as confirmed by mechanical tes-ting and fracture surface analysis.
王宇轩;连利仙;杨东;何泰君;范聪泽;宋文哲;陈芳
四川大学 材料科学与工程学院,成都 610040四川大学 材料科学与工程学院,成都 610040成都飞机工业(集团)有限责任公司,成都 610073成都飞机工业(集团)有限责任公司,成都 610073南京航空航天大学 机电学院,南京 210006南京航空航天大学 材料学院,南京 210006成都飞机工业(集团)有限责任公司,成都 610073
通用工业技术
碳纤维尼龙6复合材料预浸丝材拉伸性能结晶度孔隙率
carbon fibernyloncomposite materialspre-impregnated filamentstensile propertiescrystal-linityporosity
《复合材料科学与工程》 2026 (5)
104-115,12
航空国创基金(010601012501)
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