Enhancing mode-I and mode-II fracture toughness of epoxy and carbon fibre reinforced epoxy composites using multi-walled carbon nanotubes

被引：143

作者：

Quan, Dong ^{[1
]}

Labarga Urdaniz, Josu ^{[2
]}

Ivankovic, Alojz ^{[1
]}

机构：

[1] Univ Coll Dublin, Sch Mech & Mat Engn, Dublin, Ireland

[2] Univ Politecn Madrid, ETSI Caminos Canales & Puertos, Madrid, Spain

来源：

MATERIALS & DESIGN | 2018年 / 143卷

关键词：

Multi-walled carbon nanotubes; Epoxy; Carbon fibre reinforced epoxy composites; Fracture toughness in mode-I and mode-II; MECHANICAL-PROPERTIES; POLYMER COMPOSITES; ELECTRICAL-CONDUCTIVITY; FIBER/EPOXY COMPOSITES; HYBRID NANOCOMPOSITES; FUNCTIONALIZATION; INTERLEAVES; SHEAR; TEMPERATURE; IMPROVEMENT;

D O I：

10.1016/j.matdes.2018.01.051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multi-walled carbon nanotubes (MWCNTs) were added to an epoxy resin in an effort to improve the fracture toughness of bulk epoxy and also when used as matrix for carbon fibre reinforced epoxy composites (CFRPs). The incorporation of MWCNTs to bulk epoxy and CFRPs moderately increased the mode-I fracture energy, and significantly increased the mode-II fracture energy, i.e. the average mode-II fracture energy of CFRPs increased from 2026 J/m(2) to 3406 J/m(2) due to the addition of 0.5 wt% MWCNTs, and further to 5491 J/m(2) due to the addition of 1 wt% MWCNTs. The superior toughening performance of MWCNTs in mode-II fracture is attributed to two reasons: 1) increased MWCNT breaking and crack deflection mechanisms under shear load; and 2) large fracture process zone accompanied with extensive hackle markings and micro-cracks ahead of the mode-II crack tip of CFRPs, which resulted in significant number of MWCNTs contributing to toughening mechanisms. (c) 2018 Elsevier Ltd. All rights reserved.

引用

页码：81 / 92

页数：12

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