Z-printing of continuous fiber-reinforced thermoset composites: The process development, and mechanical properties evaluation

IF 2.3 3区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Journal of Reinforced Plastics and Composites Pub Date : 2024-04-18 DOI:10.1177/07316844241248508

Behzad Najafloo, Amir Masood Rezadoust, Masoud Latifi

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Abstract

This study presents a process development and mechanical characterization for through-the-thickness yarns (TTYs) incorporated into continuous fiber-reinforced thermoset composites (CFTCs) using a 3D printing system with photopolymer curing technology. Two types of CFTCs were prepared with different ply orientations and placement of TTYs. The mechanical properties of the samples were evaluated through three-point flexural strength tests and numerical simulations. The experimental and numerical results exhibited acceptable agreement up to the first peak of the reaction force. The presence of TTYs reduced the maximum stress and altered the failure mechanisms, while improving resistance to delamination cracking. The energyabsorption capacity of the samples with TTYs was increased by 23% to 53%. However, the flexural strength of the samples decreased by 14% to 23% with the incorporation of TTYs due to the formation of small sections with low fiber content around TTYs and the concentration of von Mises stress.

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连续纤维增强热固性复合材料的 Z 型印刷：工艺开发和机械性能评估

本研究介绍了采用光聚合物固化技术的三维打印系统在连续纤维增强热固性复合材料（CFTC）中加入贯通纱线（TTY）的工艺开发和机械特性分析。制备了两种类型的 CFTC，其层叠方向和 TTY 的位置各不相同。通过三点弯曲强度测试和数值模拟评估了样品的机械性能。实验结果和数值结果在反作用力的第一个峰值之前显示出可接受的一致性。TTY 的存在降低了最大应力，改变了破坏机制，同时提高了抗分层开裂的能力。带有 TTYs 的样品的能量吸收能力提高了 23% 至 53%。然而，由于在 TTYs 周围形成了纤维含量较低的小截面以及 von Mises 应力的集中，样品的抗弯强度在加入 TTYs 后降低了 14% 至 23%。

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来源期刊

Journal of Reinforced Plastics and Composites 工程技术-材料科学：复合

CiteScore

5.40

自引率

6.50%

发文量

审稿时长

1.3 months

期刊介绍： The Journal of Reinforced Plastics and Composites is a fully peer-reviewed international journal that publishes original research and review articles on a broad range of today''s reinforced plastics and composites including areas in: Constituent materials: matrix materials, reinforcements and coatings. Properties and performance: The results of testing, predictive models, and in-service evaluation of a wide range of materials are published, providing the reader with extensive properties data for reference. Analysis and design: Frequency reports on these subjects inform the reader of analytical techniques, design processes and the many design options available in materials composition. Processing and fabrication: There is increased interest among materials engineers in cost-effective processing. Applications: Reports on new materials R&D are often related to the service requirements of specific application areas, such as automotive, marine, construction and aviation. Reports on special topics are regularly included such as recycling, environmental effects, novel materials, computer-aided design, predictive modelling, and "smart" composite materials. "The articles in the Journal of Reinforced Plastics and Products are must reading for engineers in industry and for researchers working on leading edge problems" Professor Emeritus Stephen W Tsai National Sun Yat-sen University, Taiwan This journal is a member of the Committee on Publication Ethics (COPE).