نوع مقاله : مقاله علمی
عنوان مقاله English
نویسندگان English
This study examines the effect of size on the elastic properties of single-layer and double-layer armchair-type graphene nanoplates. To maintain the discrete nature of the nanoplates, they were modeled using equivalent spatial frame structures, with the finite element method employed to predict their elastic properties. The results were then validated by comparison with previous studies. Based on the findings, the mechanical properties of the double-layer nanoplates exhibited a slight difference in size dependence compared to the single-layer sheets. It was also observed that, for both single-layer and double-layer nanoplates, the elastic properties at smaller sizes were direction-dependent. However, as the size increased, the properties transitioned toward orthotropy, and with further enlargement, the dependence diminished, eventually approaching isotropy. Specifically, the results showed that for small nanoplates (30 Å), the Young’s moduli in two directions differed by about 6%. At a larger size (100 Å), this difference decreased to around 2%, and at 300 Å, it dropped to approximately 0.7%. Additionally, Poisson’s ratios in the two orthogonal directions for single-layer square nanoplates at smaller sizes (10 Å) exhibited a notable difference of 19%. As the size increased to (100 Å), this difference reduced to about 8%, and at 300 Å, it significantly decreased to about 1.5%. These findings suggest that the convergence to isotropy occurs more rapidly for the Young’s modulus compared to Poisson’s ratio.
کلیدواژهها English
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