| Analysis of two-dimensional contact problems considering surface effect | |
Jia N(贾宁) ; Yao Y(姚寅); Yang YZ(杨亚政); Chen SH(陈少华); Chen, SH (reprint author), Beijing Inst Technol, Zhongguancun South St, Beijing 100081, Peoples R China.
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| Source Publication | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
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| 2017-10-15 | |
| Volume | 125Pages:172-183 |
| ISSN | 0020-7683 |
| Abstract | Two-dimensional contact problems including a Boussinesq model, a semi-infinite substrate punched by a rigid flat-ended indenter or a cylindrical one, are systematically investigated with a recently developed continuum theory, in which surface effect on mechanical properties of materials is considered based on the concept of surface energy density. The contact stress and displacement fields are analyzed. It is found that the surface energy density of the indented bulk substrate, as only one additional parameter, serves as an important factor to influence the contact properties in contrast to the classical contact models. All the results show that the semi-infinite substrate becomes hardened when the surface effect is considered. Scaling analysis further demonstrates that differences between the theoretical predictions with surface effect and the classical contact solutions without surface effect become significant only if the contact width is comparable with the ratio of the bulk surface energy density to the bulk shear modulus. Specially, in the two-dimensional cylindrical punch problem, the smaller the punch size or the external compressive load, the more serious the deviation of the nano-indentation hardness predicted by the theoretical model with surface effect and the classical contact one. The results should be helpful not only for precise measurement of nano-indentation hardness but also for accurate evaluation of service performance of nanomaterials and nano-devices. (C) 2017 Elsevier Ltd. All rights reserved. |
| Keyword | Plane Strain Contact Model Surface Energy Density Surface Effect Contact Behavior Nano-indentation Hardness |
| DOI | 10.1016/j.ijsolstr.2017.07.007 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000412033200013 |
| WOS Keyword | STRAIN GRADIENT PLASTICITY ; DEPENDENT INTERFACIAL ENERGY ; ELASTIC PROPERTIES ; DEFORMATION-THEORY ; HALF-SPACE ; INDENTATION ; CURVATURE ; DENSITY ; STRESS ; NANOMATERIALS |
| WOS Research Area | Mechanics |
| WOS Subject | Mechanics |
| Funding Organization | NSFC(11532013 ; BIT Creative Research Plan ; 11372317 ; 11402270) |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/70069 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Chen, SH (reprint author), Beijing Inst Technol, Zhongguancun South St, Beijing 100081, Peoples R China. |
| Recommended Citation GB/T 7714 | Jia N,Yao Y,Yang YZ,et al. Analysis of two-dimensional contact problems considering surface effect[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2017,125:172-183. |
| APA | 贾宁,姚寅,杨亚政,陈少华,&Chen, SH .(2017).Analysis of two-dimensional contact problems considering surface effect.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,125,172-183. |
| MLA | 贾宁,et al."Analysis of two-dimensional contact problems considering surface effect".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 125(2017):172-183. |
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| JouArt-2017-120.pdf（3070KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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