Efficient and Reliable Nanoindentation Simulation by Dislocation Loop Erasing Method
文献类型：期刊论文
| 作者 | Shuang F(双飞)1,2; Xiao P(肖攀)2 ; Bai YL(白以龙)2
|
| 刊名 | ACTA MECHANICA SOLIDA SINICA
 |
| 出版日期 | 2020-07-06 |
| 页码 | 14 |
| ISSN号 | 0894-9166 |
| 关键词 | Nanoindentation Dislocation loops Boundary effects Molecular statics |
| DOI | 10.1007/s10338-020-00175-y |
| 英文摘要 | Nanoindentation is a useful technique to measure material properties at microscopic level. However, the intrinsically multiscale nature makes it challenging for large-scale simulations to be carried out. It is shown that in molecular statics simulations of nanoindentation, the separated dislocation loops (SDLs) are trapped in simulation box which detrimentally affects the plastic behavior in the plastic zone (PZ); and the long-distance propagation of SDLs consumes much computational cost yet with little contribution to the variation of tip force. To tackle the problem, the dislocation loop erasing (DLE) method is proposed in the work to alleviate the influence of artificial boundary conditions on the SDL-PZ interaction and improve simulation efficiency. Simulation results indicate that the force-depth curves obtained from simulations with and without DLE are consistent with each other, while the method with DLE yields more reasonable results of microstructural evolution and shows better efficiency. The new method provides an alternative approach for large-scale molecular simulation of nanoindentation with reliable results and higher efficiency and also sheds lights on improving existing multiscale methods. |
| 分类号 | Q3 |
| WOS关键词 | MOLECULAR-DYNAMICS SIMULATION ; ATOMISTIC SIMULATIONS ; INCIPIENT PLASTICITY ; INDENTATION ; NUCLEATION ; METALS ; SINGLE |
| WOS研究方向 | Materials Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000545938800001 |
| 资助机构 | National Natural Science Foundation of China[11790292] ; National Natural Science Foundation of China[11672298] ; National Natural Science Foundation of China[11432014] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB22040501] |
| 其他责任者 | Xiao, Pan |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/84751]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA 2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Shuang F,Xiao P,Bai YL. Efficient and Reliable Nanoindentation Simulation by Dislocation Loop Erasing Method[J]. ACTA MECHANICA SOLIDA SINICA,2020:14. |
| APA | 双飞,肖攀,&白以龙.(2020).Efficient and Reliable Nanoindentation Simulation by Dislocation Loop Erasing Method.ACTA MECHANICA SOLIDA SINICA,14. |
| MLA | 双飞,et al."Efficient and Reliable Nanoindentation Simulation by Dislocation Loop Erasing Method".ACTA MECHANICA SOLIDA SINICA (2020):14. |
入库方式： OAI收割
来源：力学研究所
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