Modeling Nanowire Indentation Test With Adhesion Effect
文献类型：期刊论文
| 作者 | Zhang Y(张吟) ; Zhao YP(赵亚溥)
|
| 刊名 | Journal of Applied Mechanics-Transactions of the ASME
 |
| 出版日期 | 2011 |
| 卷号 | 78期号:1页码:11007 |
| 关键词 | Elastic Half-Space Tensionless Contact Unbonded Contact Carbon Nanotubes Finite Beam Film Foundation Mechanics Modulus Deformation |
| ISSN号 | 0021-8936 |
| 产权排序 | [Zhang, Yin; Zhao, Ya-pu] Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China |
| 通讯作者 | Zhang, Y (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China |
| 中文摘要 | Because of the large aspect ratio of its length to radius and the large surface area to volume ratio, the nanowire is highly flexural and susceptible to the adhesion influence. The bending deflection of nanowire and its adhesion effect make the previous indentation models inappropriate for the nanowire indentation test. In this paper, a new model incorporating the nanowire bending deflection, loading symmetry/asymmetry, and adhesion effect is presented and compared with the previous models. Because of the bending deflection of the flexural nanowire, the nanowire may lift-off/separate from its contacting elastic medium and the localized contact effects may thus be induced. The localized contact effects as predicted by this new model can cause the relatively large deflection difference of the nanowire in test as compared with those obtained by the previous models, which impacts directly and significantly on the interpretation of the indentation experimental data. The nanowire is modeled as a cylinder/beam and the indentation force is modeled as a concentrated force. The elastic medium is modeled as an elastic foundation. The elastic foundation behaves as a linear spring in nonadhesive Hertz contact and as a nonlinear softening spring in adhesive contact. In the Hertz contact, due to lift-off, the contact length is independent of the load. However, in adhesive contact, larger load results in smaller contact length. Unlike the Hertz contact in which lift-off always occurs when adhesion force is too large for bending cylinder to overcome, there is no lift-off for cylinder and the full contact scenario is thus formed. [DOI: 10.1115/1.4002305] |
| 学科主题 | Mechanics |
| 分类号 | 一类/力学重要期刊 |
| 类目[WOS] | Mechanics |
| 研究领域[WOS] | Mechanics |
| 关键词[WOS] | ELASTIC HALF-SPACE ; TENSIONLESS CONTACT ; UNBONDED CONTACT ; CARBON NANOTUBES ; FINITE BEAM ; FILM ; FOUNDATION ; MECHANICS ; MODULUS ; DEFORMATION |
| 收录类别 | SCI ; EI |
| 资助信息 | This work is supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 10721202 and 10772180), the LNM initial funding for young investigators, the Ministry of Science and Technology (MOST) (Grant No. 2010CB631004), and the National Basic Research Program of China (973 Program, Grant No. 2007CB310500). |
| 原文出处 | http://dx.doi.org/10.1115/1.4002305 |
| 语种 | 英语 |
| WOS记录号 | WOS:000283739400007 |
| 公开日期 | 2012-04-01 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/44955]  |
| 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 | Zhang Y,Zhao YP. Modeling Nanowire Indentation Test With Adhesion Effect[J]. Journal of Applied Mechanics-Transactions of the ASME,2011,78(1):11007. |
| APA | Zhang Y,&Zhao YP.(2011).Modeling Nanowire Indentation Test With Adhesion Effect.Journal of Applied Mechanics-Transactions of the ASME,78(1),11007. |
| MLA | Zhang Y,et al."Modeling Nanowire Indentation Test With Adhesion Effect".Journal of Applied Mechanics-Transactions of the ASME 78.1(2011):11007. |
入库方式： OAI收割
来源：力学研究所
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