ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The research is aimed to investigate the influence of spherical nanoparticles on the fracturebehavior of glass fiber/epoxy composites. Two different contents of silica nanoparticles, 10wt% and20wt %, were introduced into the composite samples. Through a sol-gel technique, the silica particleswith diameter of 25 nm were dispersed uniformly into the epoxy matrix. Subsequently, the silicaepoxy mixtures were impregnated into the unidirectional glass fiber mat by means of a vacuum handlay-up process to form the unidirectional glass fiber/epoxy laminate. During the fabrication, a porousfilm was inserted into the mid-plane of the laminate to generate the pre-crack. The Mode I fracturetoughness of the composites with different nanoparticles contents were then determined form thedouble cantilever beam (DCB) specimens. Based on the experimental observations, it was found thatthe glass fiber/epoxy composites with silica nanoparticles exhibit superior fracture toughness thanthose that do not contain any silica particles. Scan Electronic Microscopy (SEM) observations on thefailure surfaces indicated that the enhanced fracture toughness could be due to the improvedinterfacial bounding in conjunction with the nanoparticle debonding from the surrounding epoxy. Ingeneral, such failure mechanisms may complicate the fracture process, dissipating more fractureenergy
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.1153.pdf
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