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首页> 外文期刊>Composite Structures >Analysis of the hydro-mechanical behaviour of flax fibre-reinforced composites: Assessment of hygroscopic expansion and its impact on internal stress
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Analysis of the hydro-mechanical behaviour of flax fibre-reinforced composites: Assessment of hygroscopic expansion and its impact on internal stress

机译：亚麻纤维增强复合材料的水力学行为分析：吸湿性膨胀及其对内应力的影响

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摘要

The present work aims at modelling the hydro-elastic behaviour of twill flax fabric-reinforced epoxy composites. These latter were manufactured using the vacuum infusion technique and aged into tap water until saturation. Their heterogeneity is taken into consideration by modelling the twill weave fabrics with two geometric paths: [0/90] and elliptical undulation. Moreover, the water diffusion coefficient and the hygroscopic expansion parameter of the flax fibre are estimated by an inverse approach exploiting the experimental results. In particular, the finite element simulations reveal high mechanical stress concentrations especially at the fibre-matrix interface caused by the differential swelling between the flax fabrics and the epoxy resin. This water absorption-induced internal stress is the main cause of damage initiation in the flax-epoxy composites, which leads to high variations of their mechanical properties and reduces their long-term sustainability.
机译：本工作旨在模拟斜纹亚麻织物增强的环氧复合材料的水弹性行为。后者使用真空灌注技术制造，并在自来水中陈化直至饱和。通过对具有两个几何路径的斜纹编织织物进行建模来考虑它们的异质性：[0/90]和椭圆起伏。此外，亚麻纤维的水扩散系数和吸湿膨胀参数是通过利用实验结果的逆方法估计的。尤其是，有限元模拟显示出较高的机械应力集中，尤其是在亚麻纤维与环氧树脂之间的溶胀差异引起的纤维-基体界面处。这种由吸水引起的内应力是亚麻-环氧树脂复合材料中引发损坏的主要原因，这导致其机械性能变化很大，并降低了其长期可持续性。

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  • 来源
    《Composite Structures》 |2018年第12期|177-184|共8页
  • 作者

    Chilali Abderrazak; Assarar Mustapha; Zouari Wajdi; Kebir Hocine; Ayad Rezak;

  • 作者单位

    Univ Reims, IUT Troyes, LISM EA 4695, 9 Rue Quebec, F-10026 Troyes, France;

    Univ Reims, IUT Troyes, LISM EA 4695, 9 Rue Quebec, F-10026 Troyes, France;

    Univ Reims, IUT Troyes, LISM EA 4695, 9 Rue Quebec, F-10026 Troyes, France;

    Sorbonne Univ, Univ Technol Compiegne, Res Ctr Royallieu, Roberval Lab UMR 7337, BP20529, F-60205 Compiegne, France;

    Univ Reims, IUT Troyes, LISM EA 4695, 9 Rue Quebec, F-10026 Troyes, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Flax composite; Water ageing; Internal stress; Finite element analysis;

    机译：亚麻复合材料;水老化;内应力;有限元分析;

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