工艺与制造英文2022被引 2
连续纤维增强3D打印蜂窝结构复合材料：打印工艺参数与弯曲性能深度研究
3D printed cellular structural composites with continuous fiber reinforcement: A deep study on printing structural parameters and bending performance
Ziying Cui, Xiayan Huang, Mahyar Panahi‐Sarmad, Ke Dong, Xueliang Xiao · Jiangnan University
摘要整理
本研究采用升级型熔融沉积成型（FDM）3D打印技术，以凯夫拉纤维和聚乳酸（PLA）分别作为增强体和基体，制备了多种形状填充蜂窝结构的连续纤维增强复合材料（CFRCs）。系统研究了打印路径、纤维取向、填充密度、蜂窝孔长和层厚等关键工艺参数对弯曲性能的影响。建立了有限元（FE）模型与实验结果进行对比验证。三点弯曲测试表明，随着有效密度增加，不同填充结构的CFRCs强度和刚度均显著提升。蜂窝孔长等结构参数对弯曲性能的强化作用显著，通过调整纤维沿拉伸方向的取向可进一步优化该效应。菱形填充蜂窝结构CFRCs样品在层厚0.1 mm时弯曲强度和模量最高，分别达到53.61 MPa和2728.41 MPa。研究表明，复合材料力学性能主要取决于芯体形状、蜂窝孔长和层厚，通过3D打印设计多种填充结构可实现所需的弯曲强度和弯曲模量，为减少打印样品数量提供了参考指导。
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