The moisture absorption of additively manufactured short carbon fibre reinforced polyamide

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2024-10-15 DOI:10.1016/j.compositesa.2024.108528

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Abstract

Polymer composites are commonly exposed to moisture and undergo reductions in mechanical properties. It is challenging to describe the moisture absorption dynamics of 3D printed parts due to manufacture-induced microstructures. This work investigates the moisture absorption of printed short carbon fibre reinforced polyamide (SFRP) with varied microstructures and its impact on mechanical properties. The printed SFRP have inferior microstructures and diffusivity increases with the number of interlayer interfaces by up to 119%, which is 258% higher than that of compression moulded composite. The yield stress and tensile modulus of SFRP decrease by up to 59% and 79%, respectively. This deterioration is irreversible and more significant than injection moulded samples as the microstructure is permanently degraded by moisture. Additionally, the shear moduli of printed polyamide and SFRP decrease by up to 63% and 74%, respectively. The results are crucial for prediction, evaluation, and maintenance of 3D printed applications in humid conditions.

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加成型短碳纤维增强聚酰胺的吸湿性

聚合物复合材料通常暴露在湿气中，机械性能会下降。由于制造引起的微结构，描述 3D 打印部件的吸湿动态具有挑战性。这项工作研究了具有不同微观结构的打印短碳纤维增强聚酰胺（SFRP）的吸湿性及其对机械性能的影响。打印的 SFRP 具有劣质微结构，扩散率随层间界面数量的增加而增加，最高达 119%，比压缩成型复合材料的扩散率高 258%。SFRP 的屈服应力和拉伸模量分别降低了 59% 和 79%。这种劣化是不可逆的，而且比注塑样品更为严重，因为微观结构会永久性受潮退化。此外，印刷聚酰胺和 SFRP 的剪切模量分别降低了 63% 和 74%。这些结果对于在潮湿条件下预测、评估和维护 3D 打印应用至关重要。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.