Fracture toughness of epoxy/multi-walled carbon nanotube nano-composites under bending and shear loading conditions

被引：144

作者：

Ayatollahi, M. R. ^{[1
]}

Shadlou, S. ^{[1
]}

Shokrieh, M. M. ^{[2
]}

机构：

[1] Iran Univ Sci & Technol, Dept Mech Engn, Ctr Excellence Expt Solid Mech & Dynam, Fatigue & Fracture Res Lab, Tehran 1684613114, Iran

[2] Iran Univ Sci & Technol, Dept Mech Engn, Ctr Excellence Expt Solid Mech & Dynam, Composites Res Lab, Tehran 1684613114, Iran

来源：

MATERIALS & DESIGN | 2011年 / 32卷 / 04期

关键词：

Brittle fracture; Nanomaterials; Composites; Polymer matrix; MIXED-MODE-I/II; MECHANICAL-PROPERTIES; EPOXY NANOCOMPOSITES; RESIN; REINFORCEMENT; ENHANCEMENT; DISPERSION; BEHAVIOR; SURFACE; PMMA;

D O I：

10.1016/j.matdes.2010.11.034

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

The effects of multi-walled carbon nanotubes (MWCNTs) on the mechanical properties of epoxy/MWCNT nano-composites were studied with emphasis on fracture toughness under bending and shear loading conditions. Several finite element (FE) analyses were performed to determine appropriate shear loading boundary conditions for a single-edge notch bend specimen (SENB) and an equation was derived for calculating the shear loading fracture toughness from the fracture load. It was seen that the increase in fracture toughness of nano-composite depends on the type of loading. That is to say, the presence of MWCNTs had a greater effect on fracture toughness of nano-composites under shear loading compared with normal loading. To study the fracture mechanisms, several scanning electron microscopy (SEM) pictures were taken from the fracture surfaces. A correlation was found between the characteristics of fracture surface and the mechanical behaviors observed in the fracture tests. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2115 / 2124

页数：10

共 39 条

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