Enhancing the fracture toughness of aerospace-grade carbon fibre/epoxy composites by interlaying surface-activated low-melt polyaryletherketone (LMPAEK) meshes

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY Composites Part B: Engineering Pub Date : 2024-09-12 DOI:10.1016/j.compositesb.2024.111824

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Abstract

This study proposed an innovative method for enhancing the interlaminar fracture resistance of carbon fibre/epoxy composites by incorporating structured low-melt polyaryletherketone meshes (LMPAEK) meshes. LMPAEK films were machined into structured hollow meshes and then surface-treated using high-power UV-irradiation. These treatments significantly increased the contact area and interface adhesion between the LMPAEK inserts and the composite matrix, leading to substantial improvement in the interlaminar fracture performance of the composite. Fracture test results demonstrated that the mode-I and mode-II fracture propagation energies of the LMPAEK-inserted composite at 22 °C were 1.04 times and 13.92 times higher, respectively, than those of the reference composite. Similarly, at 130 °C, their mode-I and mode-II fracture propagation energies were 1.36 times and 8.56 times higher, respectively. The remarkable fracture performance of the LMPAEK-inserted composites were attributed to the substantial plastic deformation and damage of the LMPAEK resins, which possessed exceptional mechanical properties and thermal resistance.

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通过夹层表面活性低熔聚芳醚酮（LMPAEK）网格提高航空航天级碳纤维/环氧树脂复合材料的断裂韧性

本研究提出了一种创新方法，通过加入结构化低熔聚芳醚酮网格（LMPAEK）来增强碳纤维/环氧复合材料的层间抗断裂性。LMPAEK 薄膜被加工成结构化空心网格，然后使用高功率紫外线照射进行表面处理。这些处理方法大大增加了 LMPAEK 插入物与复合材料基体之间的接触面积和界面粘附力，从而大大改善了复合材料的层间断裂性能。断裂测试结果表明，在 22 °C 时，插入 LMPAEK 的复合材料的模态 I 和模态 II 断裂扩展能分别是参考复合材料的 1.04 倍和 13.92 倍。同样，在 130 °C 时，它们的模态-I 和模态-II 断裂扩展能分别是参考复合材料的 1.36 倍和 8.56 倍。插入 LMPAEK 的复合材料之所以具有如此优异的断裂性能，是因为 LMPAEK 树脂具有优异的机械性能和耐热性，可产生大量塑性变形和损伤。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.