工艺与制造英文2023被引 6
利用扭转连续纤维复合材料通过3D打印实现弯曲多层层板的可成形性
Formability of curved multilayer laminates via 3D printing using twisted continuous fiber composites
Keigo Nakajima, Ryosuke Matsuzaki · Tokyo University of Science
摘要整理
虽然3D打印机能够打印自由形状的三维结构，但其机械性能往往不理想。采用碳纤维增强热塑性复合材料（CFRTP）进行3D打印可以形成具有改善机械性能的三维结构。然而，在使用连续碳纤维增强热塑性复合材料3D打印机成型含有弯曲部分的结构时，弧形打印过程中丝材内外路径的差异导致CFRTP丝材产生扭转，从而降低成型精度。本研究通过评估扭转CFRTP丝材的层板3D打印成形性，以减小内外路径差异的影响。将成型精度定义为单层纤维一周内丝材宽度的最大变化量（最大宽度与最小宽度之差）。单层打印时，随着扭转角增大，丝材宽度减小，成型精度（丝材宽度变化）降低。但在多层堆叠情况下，当扭转角为6°时，丝材宽度的最大变化量最小。在K=1时发现最优扭转角是本研究最重要的发现，表明对于不同的K值存在相应的最优扭转角的可能性。
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