The effects of surface tension on the elastic properties of nano structures
文献类型：期刊论文
| 作者 | Wang ZQ(王志乔); Zhao YP(赵亚溥) ; Huang ZP(黄筑平)
|
| 刊名 | International Journal of Engineering Science
 |
| 出版日期 | 2010 |
| 卷号 | 48期号:1页码:140-150 |
| 通讯作者邮箱 | yzhao@imech.ac.cn |
| ISSN号 | 0020-7225 |
| 通讯作者 | 赵亚溥 |
| 合作状况 | 其它 |
| 中文摘要 | In the absence of external loading, surface tension will induce a residual stress field in the bulk of nano structures. However, in the prediction of mechanical properties of nano structures, the elastic response of the bulk is usually described by classical Hooke’s law, in which the aforementioned residual stress was neglected in the existing literatures. The present paper investigates the influences of surface tension and the residual stress in the bulk induced by the surface tension on the elastic properties of nano structures. We firstly present the surface elasticity in the Lagrangian and the Eulerian descriptions and point out that even in the case of infinitesimal deformations the reference and the current configurations should be discriminated; otherwise the out-plane terms of surface displacement gradient, associated with the surface tension, may sometimes be overlooked in the Eulerian descriptions, particularly for curved and rotated surfaces. Then, the residual stress in the bulk is studied through the non-classical boundary conditions and used to construct the linear elastic constitutive relations for the bulk material. Finally, these relations are adopted to analyze the size-dependent properties of pure bending of Al nanowires. The present results show that surface tension will considerably affect the effective Young’s modulus of Al nanowires, which decrease with either the decrease of nanowires thickness or the increase of the aspect ratio. |
| 学科主题 | 固体力学 |
| 类目[WOS] | Engineering, Multidisciplinary |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | THIN-FILMS ; STRESS ; ENERGY ; NANOWIRES ; SOLIDS ; STRAIN ; BOUNDARY |
| 收录类别 | SCI |
| 原文出处 | http://dx.doi.org/10.1016/j.ijengsci.2009.07.007 |
| 语种 | 英语 |
| WOS记录号 | WOS:000274447400004 |
| 公开日期 | 2010-01-07 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/33033]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang ZQ,Zhao YP,Huang ZP. The effects of surface tension on the elastic properties of nano structures[J]. International Journal of Engineering Science,2010,48(1):140-150. |
| APA | 王志乔,赵亚溥,&黄筑平.(2010).The effects of surface tension on the elastic properties of nano structures.International Journal of Engineering Science,48(1),140-150. |
| MLA | 王志乔,et al."The effects of surface tension on the elastic properties of nano structures".International Journal of Engineering Science 48.1(2010):140-150. |
入库方式： OAI收割
来源：力学研究所
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