Effect of functionalization of single-wall carbon nanotubes (SWNTs) on the damping characteristics of SWNT-based epoxy composites via multiscale analysis

被引：36

作者：

Liu, Ailin ^{[1
]}

Wang, K. W. ^{[1
]}

Bakis, Charles E. ^{[2
]}

机构：

[1] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA

[2] Penn State Univ, Dept Engn Sci & Mech, University Pk, PA 16802 USA

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2011年 / 42卷 / 11期

关键词：

Nano-structures; Polymer-matrix composites (PMCs); Internal friction/damping; Multiscale modeling; MECHANICAL-PROPERTIES;

D O I：

10.1016/j.compositesa.2011.07.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of carbon nanotube functionalization on damping characteristics of SWNT-based composites is investigated for the first time with a sequential multiscale approach. The process consists of two parts. First, the interfacial shear strength between the functionalized nanotube and the epoxy is calculated by simulating a SWNT pull-out test using the molecular dynamics method. The strength values obtained from atomic simulation are then applied to a micromechanical damping model of a representative unit cell of a SWNT/epoxy composite under cyclic loading. The analysis results indicate that the nanotube functionalization increases the interfacial shear strength. Due to the stick-slip motion at the interfacial surface, the effective loss factor of the epoxy with functionalized nanoropes is sensitive to the applied load/stress. The increased shear strength can either enhance or reduce the damping ability of the composite, depending on the operational load/stress range and nanotube aspect ratio. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1748 / 1755

页数：8

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