工艺与制造英文2023被引 1
连续纤维增强3D打印热塑性复合材料的工艺技术与力学性能
Technology and mechanical properties of reinforced continuous fiber 3D-printed thermoplastic composite
Vladyslav Solovei, Anton Karvatskii · Igor Sikorsky Kyiv Polytechnic Institute
摘要整理
背景:基于熔融沉积成型(FDM)的增材制造技术因投资成本低、生产工艺简便等优势,受到工业界和科研机构的广泛关注。通过合理选择工艺参数,可获得力学性能接近传统工艺产品的制品。目标:实现聚乳酸(PLA)/连续芳纶纤维(Kevlar)热塑性复合材料的FDM 3D打印工艺,并测定其力学性能。方法:采用实验与理论相结合的方式,研究复合材料的极限拉伸强度和弹性模量,利用SHIMADZU AGS-X万能试验机进行样品测试,并通过反演问题求解建立预测模型。结果:对PLA+Kevlar纤维(直径0.3 mm)热塑性复合材料进行拉伸试验。当芳纶体积分数约12%时,增强复合材料的拉伸强度相比未增强材料提高2.38倍,弹性模量提高1.45倍。在置信区间0.68的条件下,极限拉伸强度的测定误差为3.5%,弹性模量的测定误差为4.5%。建立了增强度变化范围在15%以内的热塑性复合材料弹性模量预测的理论关系式。结论:验证了基于FDM的增材制造技术在制备高性能热塑性复合材料中的应用可行性。
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