Mechanical behaviour of SiO2 nano-particle filled epoxy at high strain rates |

Issue		Volume 2, 2009 DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading


Page(s)		1039 - 1044
Section		Micro-Structural Effects
DOI		10.1051/dymat/2009145
Published online		15 September 2009

DYMAT 2009 (2009) 1039-1044
DOI: 10.1051/dymat/2009145

Mechanical behaviour of SiO₂ nano-particle filled epoxy at high strain rates

L.M. Yang¹, G.C. Zhou², S.K. Liao¹, L. Song¹ and L.J. Shen¹

¹ Mechanics and Materials Science Research Centre, Ningbo University, 315211, PR China
² CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, 230026, P.R. China

Published online: 15 September 2009

Abstract
The focus of the study is to experimentally and theoretically characterize dynamic mechanical behaviour of epoxy-SiO₂ nanocomposites with different nanoparticle fraction at high strain rates. Firstly, Young's modulus under quasistatic loading is analyzed to show the nano effects on the material properties, where an equivalent volume fraction model is proposed. It is found that Young's modulus of nanocomposite predicted by the traditional micromechanical theory is always smaller than measured value. Furthermore, the dynamic behavior of nanocomposite is analyzed through examining the relaxation behavior under high strain rates and comparing the effects of particle fraction in detail. It is revealed that the nanoparticle obviously influences on the viscosity of material at high stain rate. However, the nano effect on the viscosity at low strain rates is not obvious.

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