期刊
COMPOSITES PART B-ENGINEERING
卷 234, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2022.109687
关键词
Material-extrusion based 3D printing; Epoxy-infusion treatment; Dual -polymer composites; Principal stress trajectory; Curved continuous carbon fibre
A manufacturing technique combining 3D printing and epoxy infusion treatment was developed to fabricate curved continuous carbon fibre reinforced composites. The stiffness and strength of the printed composites were significantly increased compared to traditional thermoplastic-only composites. The study also showed that placing continuous carbon fibres along the principal stress trajectories greatly improved the failure strength and fracture toughness of the composites.
A manufacturing technique was developed to fabricate curved continuous carbon fibre reinforced composites based on 3D printing and epoxy-infusion treatment. Composite preforms were first manufactured by material-extrusion based 3D printing of continuous carbon fibre reinforced thermoplastic polyamide-6 (PA-6) fila-ments. Powder thermoset epoxy was added to the preforms to fill up the gaps, remove air voids and enhance the interfacial bonding through a traditional vacuum bagging and oven curing process. Uniaxial tensile tests showed that the stiffness and strength of the printed composites were increased by 29.3% and 22.1%, respectively, compared to the thermoplastic-only composite specimens. The epoxy-infusion treatment technique was also adopted to manufacture composites with curved fibre alignment and investigate the performance of 3D printed notched specimens under uniaxial tension. It was shown that the placement of continuous carbon fibres along the principal stress trajectories increased the failure strength and the fracture toughness of the composites by 81% and 157% respectively, compared to the unidirectional and concentric placement methods.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据