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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Developing a nested micromechanical model to predict the relaxation moduli of graphene nanoplatelets/carbon fiber reinforced hybrid nanocomposites
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Developing a nested micromechanical model to predict the relaxation moduli of graphene nanoplatelets/carbon fiber reinforced hybrid nanocomposites

机译：建立一个嵌套的微力学模型来预测石墨烯纳米片/碳纤维增强杂化纳米复合材料的弛豫模量

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摘要

A nested analytical method, a product of combining two micromechanical models is developed in this study. The proposed micromechanical method predicts the relaxation properties of polymer hybrid nanocomposites containing linearly visco-elastic matrix, transversely isotropic elastic carbon fibers, and graphene nanoplatelets. Calculations performed in this model are of two scales. The small scale, which is the domain of epoxy resin and graphene nanoplatelet interactions, and the large scale, which assumes the small scale as a homogenized isotropic matrix. In the large scale, the prescribed matrix is then reinforced by the unidirectional CFs. Each scale calculation gives the properties of the underlying material. Secant moduli and the field fluctuation techniques are adopted in this study. Resulting explicit formulae allows one to calculate the overall relaxation moduli of the graphene nanoplatelet/carbon fiber-reinforced polymer hybrid nanocomposites. By comparing the data obtained by experiments and the results extracted by the proposed micromechanical approach, the accuracy of the model becomes apparent. Addition of graphene nanoplatelets into the fibrous composites leads to an improvement in the relaxation properties of the hybrid nanocomposites. Also, the elastic properties of graphene nanoplatelet/carbon fiber-reinforced epoxy hybrid nanocomposites are reported. The role of graphene nanoplatelet agglomeration, frequently encountered in real engineering situations, in the mechanical response of unidirectional hybrid nanocomposites is examined. The effects of volume fraction of graphene nanoplatelets and CFs on the overall mechanical properties are investigated.
机译：本研究开发了一种嵌套分析方法，该方法是将两个微机械模型结合在一起的产物。拟议的微力学方法预测了包含线性粘弹性基质，横向各向同性弹性碳纤维和石墨烯纳米片的聚合物杂化纳米复合材料的弛豫特性。在此模型中执行的计算分为两个等级。小规模是环氧树脂和石墨烯纳米片相互作用的领域，而大规模则假定小规模是均质的各向同性基质。在大规模情况下，然后通过单向CF增强指定的矩阵。每次比例计算都会给出基础材料的属性。本研究采用正割模量和场波动技术。所得的明确公式使得人们可以计算出石墨烯纳米片/碳纤维增强的聚合物杂化纳米复合材料的总体弛豫模量。通过比较实验获得的数据和所提出的微机械方法提取的结果，模型的准确性变得显而易见。将石墨烯纳米薄片添加到纤维复合物中导致杂化纳米复合材料的弛豫性能的改善。此外，还报道了石墨烯纳米片/碳纤维增强的环氧杂化纳米复合材料的弹性性能。研究了在实际工程情况下经常遇到的石墨烯纳米片团聚在单向杂化纳米复合材料力学响应中的作用。研究了石墨烯纳米片和CFs的体积分数对整体力学性能的影响。

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    Northwestern Polytech Univ Res Ctr Unmanned Syst Strategy Dev Xian 710072 Peoples R China;

    Xian Technol Univ Sch Mechatron Engn Xian Peoples R China;

    Northwestern Polytech Univ Sch Mech Engn Xian Peoples R China;

    Northwestern Polytech Univ Sci & Technol UAV Lab Xian Peoples R China;

    Islamic Azad Univ Dept Mech Engn Takestan Iran;

  • 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

    Relaxation modulus; graphene nanoplatelet; hybrid nanocomposite; nested model; visco-elastic;

    机译：松弛模量石墨烯纳米血小板杂化纳米复合材料嵌套模型粘弹性;

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