工艺与制造英文2023被引 23
连续亚麻纤维增强生物可降解复合材料的材料挤出3D打印
Material extrusion 3D printing of biodegradable composites reinforced with continuous flax fibers
Jure Kajbič, Gorazd Fajdiga, Jernej Klemenc · University of Ljubljana
摘要整理
利用材料挤出法（熔融沉积成型）制造增材成型热塑性零件需要引入连续增强纤维以提高承载能力。本研究采用多喷头3D打印机，以聚乳酸（PLA）为基体、连续亚麻纤维为增强体，制备了生物可降解复合材料。制造了单向拉伸和弯曲试样，纤维体积分数达18%，具有类零件形状。针对四种不同的复合材料与基体层排列方式进行了力学性能测试。与无增强纤维试样相比，拉伸弹性模量和拉伸强度分别提高了3.6倍和2.9倍；弯曲弹性模量提高了2.4倍，弯曲强度提高了1.4倍。研究表明，通过改变纤维体积分数和复合材料层排列方式，可以有效调控材料的力学性能和破坏模式，为连续纤维增强热塑性复合材料的增材制造提供了新的设计思路。
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