Luo Huiyan, Tan Yuegang, Zhang Fan, Zhang Jun, Tu Yiwen, Cui Kunteng
Institute of Advanced Materials and Manufacturing Technology, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel). 2019 Oct 28;12(21):3529. doi: 10.3390/ma12213529.
Aiming at the limited mechanical properties of general thermoplastic 3D printed models, a 3D printing process method for selective enhancement of continuous carbon fiber composite material is proposed. Firstly, the selective enhanced double nozzle working mechanism and crafts planning process are put forward. Then, based on the double nozzle carbon fiber 3D printing device, test samples are printed by polylactic acid (PLA) and carbon fiber material, and the test samples are enhanced by inserting layers of continuous carbon fiber material. The performance test of the samples is carried out. Experiment results show that when the volume fraction of continuous carbon fiber material increases gradually from 5% to 40%, the tensile strength increases from 51.22 MPa to 143.11 MPa. The performance improvement curve is fitted through experimental data. Finally, field scanning electron microscopy is used to observe the microscopic distribution of continuous fibers in the samples. The results of the research lay the foundation for the performance planning of 3D printed models.
针对普通热塑性3D打印模型力学性能有限的问题，提出一种选择性增强连续碳纤维复合材料的3D打印工艺方法。首先，提出选择性增强双喷嘴工作机制及工艺规划流程。然后，基于双喷嘴碳纤维3D打印装置，采用聚乳酸（PLA）和碳纤维材料打印测试样品，并通过插入连续碳纤维材料层对测试样品进行增强。对样品进行性能测试。实验结果表明，当连续碳纤维材料的体积分数从5%逐渐增加到40%时，拉伸强度从51.22MPa增加到143.11MPa。通过实验数据拟合性能提升曲线。最后，用场发射扫描电子显微镜观察样品中连续纤维的微观分布。研究结果为3D打印模型的性能规划奠定了基础。
