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The effective properties and local aggregation effect of CNT/SMP composites |
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| Authors: | Qing-sheng Yang Xiao-qiao HeXia Liu Fang-fang LengYiu-Wing Mai |
| Affiliation: | a Department of Engineering Mechanics, Beijing University of Technology, Beijing 100124, China b Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China c Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering J07, University of Sydney, Sydney, NSW 2006, Australia |
| Abstract: | A micromechanics model of the thermomechanical constitutive behavior and micro-structural inhomogeneity of carbon nanotubes (CNTs)/shape memory polymer (SMP) composites is presented. It is assumed that the CNTs are elastic and the SMP obeys a thermomechanical constitutive law. The effective properties of CNT/SMP composites are examined using a micro-mechanics method. The effect of CNT aggregation in the composite, frequently encountered in real engineering situations, is studied. The degree of aggregation is described by an aggregation coefficient, and the effective properties of SMP composites with aggregated CNTs are calculated using a stepping scheme. It is shown that the degree of CNT aggregation dramatically influences the effective properties of the CNT/SMP composites. A homogeneous microstructure leads to maximum levels of effective composite properties. |
| Keywords: | A Smart materials A Nano-structures Aggregation of CNTs B Mechanical properties C Micromechanics |
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