Non-linearities in tensile behaviour of flax fibre bundles

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-08-30 DOI:10.1016/j.compositesb.2025.112955

K. Gogoli, F. Gehring, M. Moralès, C. Poilâne

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Abstract

This work focused on the mechanical behaviour of flax fibre bundles to understand their response to tensile testing. Flax bundles exhibit the same non-linear behaviour under mechanical stress as elementary fibres. Video recorded tests revealed that during tensile loading, fibre bundles undergo a coupling between tension and rotation. Three different scenarios were identified: pure tension, tension-torsion coupling to failure, and partial tension-torsion coupling ending before specimen failure. Elementary fibre decohesion was also observed during fibre bundle tensile tests. Overall, the tensile behaviour of fibre bundles is influenced by their initial morphology, especially the degree of twist, and the mechanical efficiency of the lamella between the elementary fibres (middle lamella). In addition, the influence of the geometric model used to represent the cross-section on the mechanical properties was investigated using circular and elliptical models. The results show a significant dependence on the geometrical model considered. Therefore, a standardised method for measuring the cross-sectional area of plant fibres is required to enable comparison of results from the literature.

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亚麻纤维束拉伸性能的非线性

这项工作的重点是亚麻纤维束的力学行为，以了解他们对拉伸测试的反应。亚麻束在机械应力下表现出与初级纤维相同的非线性行为。视频记录测试显示，在拉伸加载期间，纤维束经历张力和旋转之间的耦合。确定了三种不同的情况：纯拉伸，拉伸-扭转耦合失效，部分拉伸-扭转耦合在试件破坏前结束。在纤维束拉伸试验中也观察到初级纤维脱黏。总的来说，纤维束的拉伸行为受其初始形态的影响，特别是捻度，以及初级纤维之间的片层（中间片层）的机械效率。此外，采用圆形和椭圆模型研究了表示截面的几何模型对力学性能的影响。结果表明，考虑几何模型有很大的依赖性。因此，需要一种测量植物纤维横截面积的标准化方法，以便对文献中的结果进行比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.