工艺与制造英文2023被引 15
3D打印连续纤维制造技术复合材料比强度性能研究
Research into Specific Mechanical Properties of Composites Produced by 3D-Printing Additive Continuous-Fiber Fabrication Technology
Peter Pokorný, Daynier Rolando Delgado Sobrino, Štefan Václav, Jana Petrů, Rafał Gołębski · Slovak University of Technology in Bratislava
摘要整理
本文研究了采用连续纤维制造（CFF）3D打印工艺制备的复合材料的比强度性能。以尼龙（Onyx）为基体材料，碳纤维作为增强相。拉伸试样中碳纤维铺层角度设定为0°、45°、90°和135°，另制备了四种角度复合的试样；同时制备了100%和37%填充率的无碳纤维对照样品。冲击试样中纤维铺层角度为0°和90°，并制备了四种角度复合的试样，同样制备了相应的无碳纤维对照样品。采用Markforged MARK TWO 3D打印机制造试样，通过METROTOM 1500计算机断层扫描进行缺陷检测，随后进行拉伸和冲击试验。结果表明：碳纤维的加入导致样品孔隙率增加，缺陷体积增大；拉伸强度Rm相比无增强材料提高了12倍，但纤维取向不当会显著降低强度，四种角度的复合铺层并未获得最高强度值；冲击试验表明纤维增强试样的断裂功增加了2.7倍，但纤维取向的改善同样导致强度下降。研究揭示了CFF工艺中纤维取向、孔隙率与力学性能的复杂关系。
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