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International Journal for Multiscale Computational Engineering
Factor de Impacto: 1.016 Factor de Impacto de 5 años: 1.194 SJR: 0.554 SNIP: 0.82 CiteScore™: 2

ISSN Imprimir: 1543-1649
ISSN En Línea: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2014006966
pages 115-125

INTERPHASE AND AGGREGATION: TWO EFFECTIVE PARAMETERS ON MECHANICAL BEHAVIOR OF POLYMER NANOCOMPOSITES

Saeid Arabnejad
Impact Mechanics Laboratory, Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore; Institute of Materials Research and Engineering, A-STAR (Agency for Science, Technology and Research)
Habib Pouriayevali
Impact Mechanics Laboratory, Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
Gin Sun Lim
Impact Mechanics Laboratory, Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
Davy W. C. Cheong
Impact Mechanics Laboratory, Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
V. P. W. Shim
Impact Mechanics Laboratory, Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore

SINOPSIS

In this study, the quasistatic mechanical behavior of Nylon-6/silica nanocomposite is examined through a hybrid experimentalcomputational approach. Two factors, particle aggregation and the interphase layer, which affect the properties of such nanocomposites, are investigated. The polymer matrix behavior in the bulk and interphase regions is described using a hyperelastic material model calibrated by experimental tension test results conducted at room and reduced temperatures. The characteristics of the interphase and bulk polymer identified are used in a finite element representative volume element (RVE) to study the effects of particle aggregation and the presence of the interphase layer. The degree of particle dispersion in the RVE is defined using a parameter termed the degree of aggregation. Simulation results show that in the absence of an interphase layer, the mechanical properties of nanocomposites are independent of the degree of aggregation. However, with the presence of an interphase layer, the aggregation of nanoparticles decreases the mechanical properties of Nylon-6/silica nanocomposite.

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