Buckling and post-buckling of single-wall carbon nanocones upon bending

Buckling and post-buckling of single-wall carbon nanocones upon bending
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单壁碳纳米锥弯曲时的屈曲和后屈曲

DOI:
10.1016/j.compstruct.2013.07.007
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发表时间:
2013-12
影响因子:
6.3
通讯作者:
L.H. He
L.H. He
中科院分区:
工程技术1区
文献类型:
--
作者:
J.W. Yan;Liew K.M.;L.H. He

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单壁碳纳米锥(SWCNC)被视为定制的石墨片,卷成无缝空心锥形形式,其两侧连接在一起。随着顶部半径或高度的增加,SWCNC 和石墨片之间的电势差变得越来越小。采用准连续体方法来研究弯曲时形成的 SWCNC 的屈曲和屈曲后行为。研究发现,高度和顶部半径都会导致临界弯曲角减小。无论高度如何,SWCNC 的顶部中心仅形成一个凹坑,并且随着弯曲角度的继续增加而向底部移动。在后屈曲阶段,底部附近出现两个微小的对称翅片,伴随着平均应变能的轻微跳跃。
A single-wall carbon nanocone (SWCNC) is treated as a tailored graphite sheet rolled up into a seamless hollow tapered form where its two sides are connected together. As either the top radius or height increases, the difference between the potential of a SWCNC and a graphite sheet becomes increasingly smaller. A quasi-continuum approach is adopted to investigate buckling and post-buckling behaviors of the formed SWCNCs, upon bending. It is found that both the height and top radius result in a decreasing critical bending angle. Only one pit develops at the top-centre of the SWCNC, irrespective of its height, and moves towards the bottom as the bending angle continues to increase. At the stage of post-buckling, two tiny symmetrical fins arise near the bottom, accompanying a slight jump in the average strain energy.
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发表时间: 1994-04-01
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