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短切碳纤维增强增材制造热塑性复合材料的拉伸性能

Tensile Properties of Additively Manufactured Thermoplastic Composites Reinforced with Chopped Carbon Fibre.

作者信息

Majko Jaroslav, Vaško Milan, Handrik Marián, Sága Milan

机构信息

Faculty of Mechanical Engineering, Department of Applied Mechanics, University of Žilina, Univerzitná 8215/1, 010 26 Žilina, Slovakia.

出版信息

Materials (Basel). 2022 Jun 14;15(12):4224. doi: 10.3390/ma15124224.

DOI:10.3390/ma15124224
PMID:35744280
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9227464/
Abstract

3D printing allows controlled deposition of composite components, which the user defines by the modification of the printing parameters. The article demonstrates that all observed printing parameters (infill type, infill orientation) influence the tensile test results of nylon reinforced with chopped carbon fiber. The highest tensile strength obtains specimens with the maximum number of walls around the circumference. The plastic region of the tensile diagram differs significantly with the change of material orientation in the structure, as the specimens with material deposited 45/-45 to the load axis have four times greater tensile strains and 20% higher tensile stresses than 0/90. The assessment of results reveals the significant difference between deformations at break and permanent deformations. In addition, the permanent lateral strain reaches up to 20%. Finally, the article consists of a brief assessment of the printing parameters (printing time, weight) of individual series. The future modelling in FEA software requires additional experiments to verify the viscoelastic properties of the material.

摘要

3D打印允许对复合部件进行可控沉积,用户可通过修改打印参数来定义这些部件。文章表明,所有观察到的打印参数(填充类型、填充方向)都会影响短切碳纤维增强尼龙的拉伸试验结果。圆周周围壁数量最多的试样获得了最高的拉伸强度。拉伸图的塑性区域随结构中材料方向的变化而有显著差异,因为材料相对于载荷轴以45°/-45°沉积的试样的拉伸应变比0°/90°的试样大四倍,拉伸应力高20%。结果评估揭示了断裂变形和永久变形之间的显著差异。此外,永久横向应变高达20%。最后,文章对各个系列的打印参数(打印时间、重量)进行了简要评估。未来在有限元分析(FEA)软件中的建模需要进行额外的实验,以验证材料的粘弹性特性。

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