A Study of Size-Dependent Microindentation
文献类型：期刊论文
| 作者 | Chen SH(陈少华) ; Tao CJ(陶彩军); Wang ZQ(王自强)
|
| 刊名 | Acta Mechanica
 |
| 出版日期 | 2004 |
| 卷号 | 167期号:1-2页码:57-71 |
| 通讯作者邮箱 | chenshaohua72@hotmail.com |
| ISSN号 | 0001-5970 |
| 通讯作者 | Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China. |
| 中文摘要 | We recently proposed a strain gradient theory to account for the size dependence of plastic deformation at micron and submicron length scales. The strain gradient theory includes the effects of both rotation gradient and stretch gradient such that the rotation gradient influences the material character through the interaction between the Cauchy stresses and the couple stresses; the stretch gradient measures explicitly enter the constitutive relations through the instantaneous tangent modulus. Indentation tests at scales on the order of one micron have shown that measured hardness increases significantly with decreasing indent size. In the present paper, the strain gradient theory is used to model materials undergoing small-scale indentations. A strong effect of including strain gradients in the constitutive description is found with hardness increasing by a factor of two or more over the relevant range behavior. Comparisons with the experimental data for polycrystalline copper and single crystal copper indeed show an approximately linear dependence of the square of the hardness, H 2, on the inverse of the indentation depth, 1/h, I.e., H-2 proportional to 1/h, which provides an important self-consistent check of the strain gradient theory proposed by the authors earlier. |
| 学科主题 | 力学 |
| 类目[WOS] | Mechanics |
| 研究领域[WOS] | Mechanics |
| 关键词[WOS] | STRAIN GRADIENT PLASTICITY ; MATRIX COMPOSITES ; INDENTATION ; CRACK ; DEFORMATION ; HARDNESS ; FRACTURE ; LAW |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000188783900005 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/16872]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Chen SH,Tao CJ,Wang ZQ. A Study of Size-Dependent Microindentation[J]. Acta Mechanica,2004,167(1-2):57-71. |
| APA | 陈少华,陶彩军,&王自强.(2004).A Study of Size-Dependent Microindentation.Acta Mechanica,167(1-2),57-71. |
| MLA | 陈少华,et al."A Study of Size-Dependent Microindentation".Acta Mechanica 167.1-2(2004):57-71. |
入库方式： OAI收割
来源：力学研究所
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