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《工程塑料应用》 2019年第08期
DOI:10.3969/j.issn.1001-3539.2019.08.019
增材制造用PLA/连续碳纤复合材料力学性能
张肖男,单忠德,范聪泽,刘晓军,闫东东
机械科学研究总院集团有限公司先进成形技术与装备国家重点试验室,北京 100044 
Mechanical Properties of PLA/Continuous Carbon Fiber Composites by Additive Manufacturing
Zhang Xiaonan, Shan Zhongde, Fan Congze, Liu Xiaojun, Yan Dongdong
State Key Laboratory of Advanced Forming Technology and Equipment, China Academy of Machinery Science and Technology Group Co.ltd, Beijing 100044, China 
摘要:为提高连续纤维复合材料增材制造后的力学性能,通过连续纤维丝材成型机制备连续碳纤维增强聚乳酸(PLA)复合丝材,采用3D打印的方式成型测试样件,研究了打印间距、打印温度、层厚三个工艺参数对复合材料拉伸和弯曲强度的影响。试验表明,打印间距和层厚对样件的拉伸、弯曲强度影响较大,而打印温度对样件的拉伸、弯曲强度影响较小。在打印温度230℃、层厚0.9 mm时,样件的拉伸和弯曲强度随着打印间距(0.50~1.10 mm)的增大先增加后降低;在打印温度220℃、打印间距0.65 mm时,样件的拉伸和弯曲强度随着层厚(0.8~1.2 mm)的增大而逐渐降低;在打印间距0.65 mm,层厚0.9 mm时,样件的拉伸强度随着打印温度(200~240℃)增大而增大,弯曲强度随着打印温度(200~240℃)的增大先增加后降低。 
Abstract:To improve mechanical properties of continuous fiber reinforced composites by additive manufacturing, continuous carbon fiber reinforced polylactic acid (PLA) composite wires were fabricated by continuous fiber forming machine. The test samples were formed by 3D printing. The effects of printing space, printing temperature and layer thickness on the tensile and flexual strength of the composite were studied. The test results show that the printing space and layer thickness have great influence on tensile and flexual strength of the sample, while the printing temperature has little influence on the tensile and flexual strength of the sample.The tensile and flexual strength of the sample increase first and then decrease with the increase of printing space (0.50-1.10 mm) at 230℃ and 0.9 mm layer thickness. The tensile and flexual strength of the sample decrease with the increase of layer thickness (0.8-1.2 mm) at 220℃ and 0.65 mm printing space. When the printing space is 0.65 mm and the thickness is 0.9 mm, the tensile strength of the sample increases with the increase of printing temperature (200-240℃), and the flexual strength increases first and then decreases with the increase of printing temperature (200-240℃). 
关键词:连续碳纤维;聚乳酸;复合材料;纤维增强;3D打印;力学性能 
Keywords:continuous carbon fiber; polylactic acid; composite; fiber reinforcement; 3D printing; mechanical property 
基金:国家重点研发计划项目(2017YFB1103400) 
本文引用格式:
张肖男,单忠德,范聪泽,等. 增材制造用PLA/连续碳纤复合材料力学性能[J].工程塑料应用,2019,47(8):91-95.
Zhang Xiaonan,Shan Zhongde,Fan Congze,et al. Mechanical properties of PLA/continuous carbon fiber composites by additive manufacturing[J]. Engineering Plastics Application,2019,47(8):91-95. 

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