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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Modeling creep behavior of carbon nanotube/fiber/polymer composite cylinders
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Modeling creep behavior of carbon nanotube/fiber/polymer composite cylinders

机译：碳纳米管/纤维/聚合物复合材料圆柱体的蠕变行为建模

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摘要

In this research, the effects of multi-walled carbon nanotubes on the distribution of long-term creep strains in thick-walled multi-walled carbon nanotube/fiber/polymer three-phase laminated composites are studied. In the first step, micromechanical models are developed to calculate the elastic properties of multi-walled carbon nanotube/vinylester and multi-walled carbon nanotube/E-glass fiber/vinylester composites. Using classical lamination plate theory, equilibrium and compatibility equations and strain–displacement relations, the distribution of effective stresses is considered. Moreover, utilizing Schapery single-integral model for nonlinear viscoelastic materials, Prandtl–Reuss relations and Mendelson’s approximation method, not only the distribution of circumferential and radial strains is investigated but also the effects of fiber orientation and weight fraction (wt.%) of the multi-walled carbon nanotubes on the way of distribution are studied. The results demonstrated that the addition of the multi-walled carbon nanotube to the vinylester can reduce absolute values of the radial and circumferential creep strains and dimensionless effective stresses. Moreover, most reduction occurred in the inner wall of the cylindrical shell when fiber orientation was α  = 90°.
机译：在这项研究中，研究了多壁碳纳米管对厚壁多壁碳纳米管/纤维/聚合物三相层压复合材料中长期蠕变应变分布的影响。第一步，建立微力学模型以计算多壁碳纳米管/乙烯基酯和多壁碳纳米管/ E-玻璃纤维/乙烯基酯复合材料的弹性性能。使用经典的层压板理论，平衡和相容性方程以及应变-位移关系，考虑有效应力的分布。此外，利用针对非线性粘弹性材料的Schapery单积分模型，Prandtl-Reuss关系和Mendelson近似方法，不仅研究了圆周应变和径向应变的分布，而且还研究了纤维取向和纤维的重量分数（wt。％）的影响。研究了多壁碳纳米管的分布方式。结果表明，在乙烯基酯中添加多壁碳纳米管可以降低径向和周向蠕变应变的绝对值以及无量纲的有效应力。此外，当纤维取向为α＝ 90°时，大部分减少发生在圆柱壳的内壁上。

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