工艺与制造英文2023被引 3
3D打印机用玻纤增强复合材料长丝的制备及力学性能研究
3B YAZICILAR İÇİN CAM FİBER KATKILI KOMPOZİT FİLAMENT ÜRETİMİ VE MEKANİK ÖZELLİKLERİ
Suat ALTUN, Buğra SEKBAN · KARABÜK ÜNİVERSİTESİ
摘要整理
3D打印技术在快速原型制造和定制生产领域的应用日益增加。熔融沉积成型(FDM)是最常用的3D打印技术,聚乳酸(PLA)是该工艺中最常见的打印材料。为使3D打印件从原型/模型制造扩展到功能性零件生产,需要提高打印长丝的力学性能。本研究通过向PLA热塑性材料中添加玻璃纤维(GF),制备玻纤增强PLA复合长丝,以实现具有更高弯曲强度和冲击强度的可用功能零件的3D打印。采用双螺杆挤出机将5%、10%和15%(质量分数)的玻璃纤维添加到PLA中制备复合颗粒,进而制成直径1.75 mm的3D打印长丝。使用制备的复合长丝进行3D打印,按ASTM D638、ASTM D790和ASTM D6110标准分别测定拉伸强度、弯曲强度和冲击强度,并与纯PLA样品进行对比。为研究打印工艺参数对力学性能的影响,设定三种填充密度(10%、50%、90%)、三种打印几何结构(直线型、网格型、蜂窝型)和两种挤出温度(190°C、210°C)进行试验。结果表明:5% GF添加时拉伸强度提高28%、弯曲强度提高24%;10% GF添加时冲击强度提高8.6%;15% GF添加时力学性能反而下降。填充密度与力学性能呈线性关系,而打印几何结构和温度参数的影响不显著。
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