دورية أكاديمية
The effects of surface tension on the elastic properties of nano structures
| العنوان: | The effects of surface tension on the elastic properties of nano structures |
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| المؤلفون: | Wang, Zhi-Qiao, Zhao, Ya-Pu, Huang, Zhu-Ping |
| المساهمون: | Zhao, YP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China., Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China., Peking Univ, LTCS, Coll Engn, Beijing 100871, Peoples R China., Peking Univ, Dept Mech & Aerosp Engn, Coll Engn, Beijing 100871, Peoples R China. |
| المصدر: | SCI |
| بيانات النشر: | international journal of engineering science |
| سنة النشر: | 2010 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | Surface stress, Surface tension, Pure bending of nanowires, Aspect ratio, THIN-FILMS, STRESS, ENERGY, NANOWIRES, SOLIDS, STRAIN, BOUNDARY |
| الوصف: | 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. (C) 2009 Elsevier Ltd. All rights reserved. ; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000274447400004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Test ; Engineering, Multidisciplinary ; SCI(E) ; 98 ; ARTICLE ; 2 ; 140-150 ; 48 |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| تدمد: | 0020-7225 |
| العلاقة: | INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE.2010,48,(2),140-150.; 935974; http://hdl.handle.net/20.500.11897/245470Test; WOS:000274447400004 |
| DOI: | 10.1016/j.ijengsci.2009.07.007 |
| الإتاحة: | https://doi.org/20.500.11897/245470Test https://doi.org/10.1016/j.ijengsci.2009.07.007Test https://hdl.handle.net/20.500.11897/245470Test |
| رقم الانضمام: | edsbas.B03ECB1F |
| قاعدة البيانات: | BASE |
| تدمد: | 00207225 |
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| DOI: | 10.1016/j.ijengsci.2009.07.007 |