Study of the Role of the Interphase Layer in the Mechanical Behavior of SWCNT/Polymer Composites Using Three-Phase Multiscale Modeling

سال انتشار: 1388
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 3,088

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شناسه ملی سند علمی:

CNS03_303

تاریخ نمایه سازی: 21 دی 1388

چکیده مقاله:

In this study, a multiscale modeling procedure is implemented to study the effect of interphase on the mechanical behavior of SWCNT/polymer composites. For this purpose, a new three-phase molecular structural mechanics/finite element (MSM/FE) multiscale model is introduced which consists of three components, i.e. a carbon nanotube, an interphase layer and outer polymer matrix. The nanotube is modeled at the atomistic scale using MSM, whereas the interphase layer and polymer matrix are analyzed by the FE method. Using this model, we investigate the macroscopic material properties of nanocomposite with and without considering the interphase and compare the results with MD simulations. It is shown that there is a noticeable deviation from MD results with two-phase model. Meanwhile the three-phase modeling shows that by considering the effect of the interphase, the elastic constants of these nanocomposites could be calculated the same as the MD results with maximum deviation of 1.8% and negligible computational costs in comparison with the MD simulation. The verified model is used to study the effect of the interphase layer on the stability of defected SWCNT/polymer composites. The buckling onset strain is calculated for defected CNTs in the polymer nanocomposites with and without considering the interphase layer. It is concluded that the existence of a more compact layer than the polymer chains coated on the nanotube can enhance drastically the buckling behavior of these nanocomposites (about 35%). Hence, considering the interphase layer in modeling the CNTbased nanocomposites is necessary and can not be ignored.

نویسندگان

A Montazeri

Institute for Nano Science & Technology, Sharif University of Technology, Iran

R Naghdabadi

Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran