Structural optimization and shear performances of the nanopins based on Y-junction carbon nanotubes

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• 作者：Zhong-Qiang Zhang^a ; ^b ; ^c ; ^{zhangzq@mail.ujs.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Jun Zhong^a ; Hong-Fei Ye^c ; Guang-Gui Cheng^a ; Jian-Ning Ding^a ; ^b ; ^{dingjn@ujs.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Y-junction CNT ; Nanopin ; Shear performance ; Structural optimization ; Molecular dynamics
• 刊名：Physica B: Physics of Condensed Matter
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：504
• 期：Complete
• 页码：13-22
• 全文大小：1782 K

文摘

Utilizing the classical molecular dynamic, we have briefly conducted geometry optimization on several typical nanopins based on Y-junction carbon nanotubes (CNTs), and further investigated their shear performance. The service performance of the nanopin is not sensitive to the length of the inserting end, while as the height of the branch tube increases, the maximum unloading force increases firstly and then keeps relatively stable. The overlong inserting end and high branch tube can lead to the severe oscillation in unloading force due to the continuous morphology change. Moreover, results show that a small angle included in Y-junction CNTs can contribute to both of the fixity of the nanopin and instability of the uninstallation process. Further investigation indicates that the orientation of the branch tubes of the nanopin determines the maximum shear performance, while the radial stability of the CNTs plays an important role in the shear performance of the nanopin. And the microstructure of the Y-junction CNT occurred during the using process can also influence its service performance.