Lee Demei, Wu Guan-Yu
Department of Mechanical Engineering, Chang Gung University, Taoyuan City 33302, Taiwan.
Polymers (Basel). 2020 Oct 23;12(11):2456. doi: 10.3390/polym12112456.
Three-dimensional (3D) printing is a manufacturing technology which creates three-dimensional objects layer-by-layer or drop-by-drop with minimal material waste. Despite the fact that 3D printing is a versatile and adaptable process and has advantages in establishing complex and net-shaped structures over conventional manufacturing methods, the challenge remains in identifying the optimal parameters for the 3D printing process. This study investigated the influence of processing parameters on the mechanical properties of Fused Deposition Modelling (FDM)-printed carbon fiber-filled polylactide (CFR-PLA) composites by employing an orthogonal array model. After printing, the tensile and impact strengths of the printed composites were measured, and the effects of different parameters on these strengths were examined. The experimental results indicate that 3D-printed CFR-PLA showed a rougher surface morphology than virgin PLA. For the variables selected in this analysis, bed temperature was identified as the most influential parameter on the tensile strength of CFR-PLA-printed parts, while bed temperature and print orientation were the key parameters affecting the impact strengths of printed composites. The 45° orientation printed parts also showed superior mechanical strengths than the 90° printed parts.
三维（3D）打印是一种制造技术，它通过逐层或逐滴的方式创建三维物体，材料浪费极少。尽管3D打印是一个通用且适应性强的过程，并且在制造复杂和网状结构方面比传统制造方法具有优势，但确定3D打印过程的最佳参数仍然是一个挑战。本研究通过采用正交阵列模型，研究了加工参数对熔融沉积成型（FDM）打印的碳纤维填充聚乳酸（CFR-PLA）复合材料力学性能的影响。打印后，测量了打印复合材料的拉伸强度和冲击强度，并研究了不同参数对这些强度的影响。实验结果表明，3D打印的CFR-PLA表面形态比纯PLA更粗糙。对于本分析中选择的变量，床层温度被确定为对CFR-PLA打印部件拉伸强度影响最大的参数，而床层温度和打印方向是影响打印复合材料冲击强度的关键参数。45°方向打印的部件也比90°打印的部件表现出更高的机械强度。
