Fracture and toughening mechanisms of GNP-based nanocomposites in modes I and II fracture

被引：51

作者：

Ahmadi-Moghadam, B. ^{[1
]}

Taheri, F. ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Civil & Resource Engn, Adv Composites & Mech Res Lab, Halifax, NS B3H 4R2, Canada

来源：

ENGINEERING FRACTURE MECHANICS | 2014年 / 131卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Fracture toughness; Process zone; Fracture mechanism; Fractography; Electron microscopy; CRACK DEFLECTION PROCESSES; EPOXY NANOCOMPOSITES; CARBON NANOTUBES; COMPOSITES; NANOPLATELETS; SYNERGY; FILLER;

D O I：

10.1016/j.engfracmech.2014.08.008

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The objective of this study was to enhance the fracture response and toughness of epoxy resins in a cost-effective manner. Therefore, an experimental program was designed to examine the fracture response and toughness (both modes I and II fracture) of an epoxy resin reinforced with different concentrations of graphene-nanoplatelets and multi-wall carbon-nanotube. The resulting nanocomposites exhibited significant improvement in their mode-I fracture toughness, while their mode-II fracture toughness was slightly degraded. Scanning-electron and atomic-force microscopes produced micrographs revealed the alteration of the fracture and toughening mechanisms of the resin by evidence such as relatively larger plastic deformation, crack deflection, bridging and pinning in mode-I fracture. An empirical fracture mechanism criterion was also proposed. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：329 / 339

页数：11

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