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Polymer reinforced by flax fibres as a viscoelastoplastic material

机译：亚麻纤维增强的聚合物作为粘弹塑性材料

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摘要

Flax fibre reinforced polymers are at the heart of current scientific and societal concerns. However their mechanical behaviour is still poorly known despite significant scientific efforts, in particular the non-linear behaviour observed under tensile tests. In this paper, results of hardening, creep and repeated progressive tests under uniaxial loading performed on various quasi-unidirectional flax fibre reinforced composites are analysed in terms of the volume fraction of fibre, the titration of yarn reinforcement and temperature testing. To identify the respective parts of pure elastic, viscoelastic and viscoplastic components in the global mechanical response, a phenomenological model is built based on eight independent parameters. The parameter identification based on experimental data and checked by a sensitivity analysis shows that the viscoelastic effects are non-significant at room temperature. The non-linear behaviour can mainly be attributed to viscoplastic effects. Viscoplastic modelling is based on a combination of two hardenings; the first classical (linear) one describes the translation of the elastic domain; the second (non-linear) one describes a translation coupled with a contraction of the elastic domain during loading that improves the unloading behaviour during repeated progressive loading tests.
机译：亚麻纤维增强聚合物是当前科学和社会关注的核心。然而，尽管作出了巨大的科学努力，但它们的机械性能仍然知之甚少，特别是在拉伸试验下观察到的非线性性能。本文分析了各种准单向亚麻纤维增强复合材料在单轴载荷下的硬化，蠕变和反复进行性试验的结果，包括纤维的体积分数，纱线增强的滴定度和温度测试。为了确定全局机械响应中纯弹性，粘弹性和粘塑性组件的各个部分，建立了基于八个独立参数的现象学模型。根据实验数据进行参数识别并通过敏感性分析进行检查，结果表明在室温下粘弹性效应不显着。非线性行为主要可归因于粘塑性效应。粘塑性建模是基于两种硬化的结合。第一个经典（线性）描述弹性域的平移；第二个（非线性）描述了在加载过程中与弹性域收缩相关的平移，该平移改善了重复进行的渐进加载测试期间的卸载行为。

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  • 来源
    《Composite Structures》 |2014年第6期|100-112|共13页
  • 作者

    C. Poilane; Z.E. Cherif; F. Richard; A. Vivet; B. Ben Doudou; J. Chen;

  • 作者单位

    Normandie Univ., France UNICAEN, CIMAP, F-14050 Caen, France Ecole Nationale Superieure d'Ingenieur de Caen (ENSICAEN), F-14050 Caen, France CNRS, UMR 6252, F-14050 Caen, France CEA, UMR 6252, F-14050 Caen, France;

    Normandie Univ., France UNICAEN, CIMAP, F-14050 Caen, France Ecole Nationale Superieure d'Ingenieur de Caen (ENSICAEN), F-14050 Caen, France CNRS, UMR 6252, F-14050 Caen, France CEA, UMR 6252, F-14050 Caen, France;

    Universite de Franche-Comte, FEMTO ST, F-25044 Besancon, France CNRS, UMR 6174, F-25044 Besancon, France;

    Normandie Univ., France UNICAEN, CIMAP, F-14050 Caen, France Ecole Nationale Superieure d'Ingenieur de Caen (ENSICAEN), F-14050 Caen, France CNRS, UMR 6252, F-14050 Caen, France CEA, UMR 6252, F-14050 Caen, France;

    Normandie Univ., France UNICAEN, CIMAP, F-14050 Caen, France Ecole Nationale Superieure d'Ingenieur de Caen (ENSICAEN), F-14050 Caen, France CNRS, UMR 6252, F-14050 Caen, France CEA, UMR 6252, F-14050 Caen, France;

    Normandie Univ., France UNICAEN, CIMAP, F-14050 Caen, France Ecole Nationale Superieure d'Ingenieur de Caen (ENSICAEN), F-14050 Caen, France CNRS, UMR 6252, F-14050 Caen, France CEA, UMR 6252, F-14050 Caen, 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

    A. Flax/epoxy; A. Unidirectional composite; B. Viscoelastoplasticity; C. Phenomenological modelling; C. Identifiability analysis;

    机译：A.亚麻/环氧树脂;A.单向复合材料;B.粘弹塑性;C.现象学建模;C.可识别性分析;

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