| Modeling Nanowire Indentation Test With Adhesion Effect | |
Zhang Y(张吟) ; Zhao YP(赵亚溥); Zhang, Y (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China
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| Source Publication | Journal of Applied Mechanics-Transactions of the ASME
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| 2011 | |
| Volume | 78Issue:1Pages:11007 |
| ISSN | 0021-8936 |
| Abstract | 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] |
| Keyword | Elastic Half-space Tensionless Contact Unbonded Contact Carbon Nanotubes Finite Beam Film Foundation Mechanics Modulus Deformation |
| Subject Area | Mechanics |
| DOI | 10.1115/1.4002305 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000283739400007 |
| WOS Keyword | ELASTIC HALF-SPACE ; TENSIONLESS CONTACT ; UNBONDED CONTACT ; CARBON NANOTUBES ; FINITE BEAM ; FILM ; FOUNDATION ; MECHANICS ; MODULUS ; DEFORMATION |
| WOS Research Area | Mechanics |
| WOS Subject | Mechanics |
| Funding Organization | 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). |
| Department | LNM纳/微系统力学与物理力学 |
| Classification | 一类/力学重要期刊 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/44955 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Zhang, Y (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang Y,Zhao YP,Zhang, Y . 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,&Zhang, Y .(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. |
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| SCI-J2011080.pdf（352KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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