Investigating nanoparticle effect on the Mode I fracture toughness of glass/epoxy composites

Jia-Lin Tsai*, Yi Lieh Cheng

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The research is aimed to investigate the influence of spherical nanoparticles on the fracture behavior of glass fiber/epoxy composites. Two different contents of silica nanoparticles, 10wt% and 20wt %, were introduced into the composite samples. Through a sol-gel technique, the silica particles with diameter of 25 nm were dispersed uniformly into the epoxy matrix. Subsequently, the silica epoxy mixtures were impregnated into the unidirectional glass fiber mat by means of a vacuum hand lay-up process to form the unidirectional glass fiber/epoxy laminate. During the fabrication, a porous film was inserted into the mid-plane of the laminate to generate the pre-crack. The Mode I fracture toughness of the composites with different nanoparticles contents were then determined form the double cantilever beam (DCB) specimens. Based on the experimental observations, it was found that the glass fiber/epoxy composites with silica nanoparticles exhibit superior fracture toughness than those that do not contain any silica particles. Scan Electronic Microscopy (SEM) observations on the failure surfaces indicated that the enhanced fracture toughness could be due to the improved interfacial bounding in conjunction with the nanoparticle debonding from the surrounding epoxy. In general, such failure mechanisms may complicate the fracture process, dissipating more fracture energy.

Original languageEnglish
Title of host publicationMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
PublisherTrans Tech Publications
Pages1153-1156
Number of pages4
ISBN (Print)0878493786, 9780878493784
DOIs
StatePublished - 1 Jan 2008
EventMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures - Hong Kong, P.R., China
Duration: 28 Jul 200831 Jul 2008

Publication series

NameAdvanced Materials Research
Volume47-50 PART 2
ISSN (Print)1022-6680

Conference

ConferenceMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
CountryChina
CityHong Kong, P.R.
Period28/07/0831/07/08

Keywords

  • Fiber composites
  • Fracture toughness
  • Silica nanoparticle

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