کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10226552 1701277 2018 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quantized prediction of coefficients of thermal expansion of 3-D CNT-Graphene junctioned carbon nanostructures
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Quantized prediction of coefficients of thermal expansion of 3-D CNT-Graphene junctioned carbon nanostructures
چکیده انگلیسی
A computational finite element analysis based on a structural molecular mechanics approach was conducted to predict effective coefficients of thermal expansion (CTE) of a novel three-dimensional carbon nanostructure, pillared graphene structure (PGS), which is constituted with several graphene sheets and single-walled carbon nanotubes. Four sets of representative unitcell models were developed atomistically having different geometric parameters of pillar length and inter-pillar distance in the PGS. Periodic boundary conditions were applied to periodic unitcell geometries to yield consistent results. Parametric study shows that both pillar length and inter-pillar distance significantly affect the effective in-plane and through-thickness CTEs. The PGS with smaller inter-pillar distance and larger pillar length yields higher in-plane CTEs, while that with larger inter-pillar distance and smaller pillar length yields higher through-thickness CTE. The calculation yields negative through-thickness CTE at low temperatures (T<100 K) for all sets of PGSs, which is associated with the curvature at the junction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 166, 29 September 2018, Pages 46-53
نویسندگان
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