期刊
ENGINEERING FRACTURE MECHANICS
卷 97, 期 -, 页码 193-206出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2012.10.027
关键词
Epoxy; Nanosilica; Fracture toughness; Toughening mechanisms; Specific surface area
类别
An epoxy resin was modified by the addition of different nanosilica particles. The particles were distributed into epoxy resin with ultrasonic instrument which gave a very well-dispersed phase of nanosilica particles. Tensile test and dynamic mechanical thermal analysis (DMTA) showed that Young's modulus increased and the glass transition temperature was unchanged. The fracture energy increased to about 620 J/m(2) for the epoxy with 3.17 vol.% of 12-nm diameter nanoparticles. The responsible toughening mechanisms were recognized to be plastic deformation and plastic void growth. Finally, the toughening mechanisms have been quantitatively modeled and an excellent agreement between the results was found. (C) 2012 Elsevier Ltd. All rights reserved.
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