Ekşi Seçil, Karakaya Cetin
Mechanical Engineering Department, Sakarya University, Sakarya 54100, Turkey.
Independent Researcher, Hastings, East Sussex TN34 1EN, UK.
Polymers (Basel). 2025 Jul 14;17(14):1934. doi: 10.3390/polym17141934.
This study investigates the influence of key fused deposition modeling (FDM) process parameters, namely, print speed, infill percentage, layer thickness, and layer width, on the tensile properties of PLA specimens produced using 3D printing technology. A Taguchi L9 orthogonal array was employed to design the experiments efficiently, enabling the systematic evaluation of parameter effects with fewer tests. Tensile strength and elongation at break were measured for each parameter combination, and statistical analyses, including the signal-to-noise (S/N) ratio and analysis of variance (ANOVA), were conducted to identify the most significant factors. The results showed that infill percentage significantly affected tensile strength, while layer thickness was the dominant factor influencing elongation. The highest tensile strength (47.84 MPa) was achieved with the parameter combination of 600 mm/s print speed, 100% infill percentage, 0.4 mm layer thickness, and 0.4 mm layer width. A linear regression model was developed to predict tensile strength with an R value of 83.14%, and probability plots confirmed the normal distribution of the experimental data. This study provides practical insights into optimizing FDM process parameters to enhance the mechanical performance of PLA components, supporting their use in structural and functional applications.
本研究调查了关键的熔融沉积建模（FDM）工艺参数，即打印速度、填充率、层厚和层宽，对使用3D打印技术生产的聚乳酸（PLA）试样拉伸性能的影响。采用田口L9正交阵列来高效设计实验，从而能够用较少的测试对参数效应进行系统评估。对每个参数组合测量了拉伸强度和断裂伸长率，并进行了包括信噪比（S/N）和方差分析（ANOVA）在内的统计分析，以确定最显著的因素。结果表明，填充率对拉伸强度有显著影响，而层厚是影响断裂伸长率的主要因素。在打印速度600毫米/秒、填充率100%、层厚0.4毫米和层宽0.4毫米的参数组合下，实现了最高拉伸强度（47.84兆帕）。建立了线性回归模型来预测拉伸强度，R值为83.14%，概率图证实了实验数据的正态分布。本研究为优化FDM工艺参数以提高PLA部件的机械性能提供了实际见解，支持其在结构和功能应用中的使用。
