工艺与制造英文2024被引 1
3D打印连续碳纤维/聚丙烯格栅芯层复合材料夹芯结构的力学性能
MECHANICAL PROPERTIES OF 3D PRINTED CONTINUOUS CARBON FIBER/ POLYPROPYLENE LATTICE CORE COMPOSITE SANDWICH STRUCTURE
İbrahim Kürşad Türkoğlu, Tolgahan Bayram, Murat Yazıcı · AMASYA ÜNİVERSİTESİ
摘要整理
3D制造技术在功能部件生产中展现出广阔应用前景。虽然初期仅采用热塑性长丝，但通过不断发展的技术手段，纤维增强复合材料部件的3D打印已成为可能。本研究系统调查了3D打印连续碳纤维增强（CFR）复合材料夹芯板的准静态和动态力学性能。夹芯板采用棱柱形格栅芯层夹持于CFR复合材料面板之间的结构设计。采用连续碳纤维增强热塑性（聚丙烯）单丝复合材料（CCTMC）制造夹芯结构，通过实验室规模生产系统（包括热塑性挤出机和专用模具）进行制造。夹芯板面板采用热压模具成型，采用[0°/90°/0°]三层铺层方式制造。所得夹芯板具有完全可回收性和超轻量化特征，采用金字塔形桁架型格栅作为芯层结构。测试结果表明：压缩试验中试样峰值力约270 kN，三点弯曲试验中峰值力约240 kN，结构变形发生在单体复合材料单元达到屈曲极限时。在动态三点弯曲试验中，由于材料的应变速率相关性，峰值力增加约2倍，达到450 kN。该研究为轻量化、可回收复合材料结构的3D打印制造提供了重要参考。
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