KMS Of Academy of mathematics and systems sciences, CAS
Shock-induced plasticity and damage in single-crystalline Cu at elevated temperatures by molecular dynamics simulations | |
Tian, Xia1; Cui, Junzhi2; Ma, Kaipeng1; Xiang, Meizhen3 | |
2020-09-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER |
ISSN | 0017-9310 |
卷号 | 158页码:17 |
摘要 | Initial temperature effects on shock responses, including shock-induced plasticity and spalling damage behaviors of single-crystalline Cu are investigated by molecular dynamics simulations. Firstly, initial temperature effects on stress wave profiles are investigated. The simulations show that shock Hugoniot stress deceases as initial temperature increases, which can be explained by the Rakine-Hugoniot conservation theory. Initial temperature effects on dislocation density are studied. It is found that the dislocation density decreases as initial temperature increases. Shock-induced spalling is dominated by cavitation, i.e., void nucleation, growth and coalescence. Initial temperature effects on cavitation are discussed. In cases of relatively low shock intensity, the total number of voids increases as initial temperature rises; for strong shock intensities that induce melting and micro-spalling, initial temperature effects on the total number of voids are not obvious. Furthermore, initial temperature effects on spall strength are found to be dependent on shock intensity. For relatively weak shock intensity, the simulations show that spall strength starts to drop when initial temperature exceeds 900 K, far below the melting temperature, this result is well consistent with previous experimental measurements; however, for high shock intensity, our simulations predict that spall strength decreases monotonically as initial temperature increases. (C) 2020 Elsevier Ltd. All rights reserved. |
关键词 | Shock response Temperature effects Dislocation density Spalling Melting Molecular dynamics simulations |
DOI | 10.1016/j.ijheatmasstransfer.2020.120013 |
收录类别 | SCI |
语种 | 英语 |
资助项目 | National Natural Science Foundation of China[11772068] ; National Natural Science Foundation of China[11972147] ; Science China[TZ2016001] ; Fundamental Research Funds for the Central Universities[2013/B18020579] |
WOS研究方向 | Thermodynamics ; Engineering ; Mechanics |
WOS类目 | Thermodynamics ; Engineering, Mechanical ; Mechanics |
WOS记录号 | WOS:000557371100065 |
出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.amss.ac.cn/handle/2S8OKBNM/51950 |
专题 | 计算数学与科学工程计算研究所 |
通讯作者 | Xiang, Meizhen |
作者单位 | 1.Hohai Univ, Coll Mech & Mat, Nanjing 210098, Peoples R China 2.Univ Chinese Acad Sci, Acad Math & Syst Sci, ICMSEC, LSEC, Beijing 100190, Peoples R China 3.Inst Appl Phys & Computat Math, Lab Computat Phys, Beijing 100088, Peoples R China |
推荐引用方式 GB/T 7714 | Tian, Xia,Cui, Junzhi,Ma, Kaipeng,et al. Shock-induced plasticity and damage in single-crystalline Cu at elevated temperatures by molecular dynamics simulations[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2020,158:17. |
APA | Tian, Xia,Cui, Junzhi,Ma, Kaipeng,&Xiang, Meizhen.(2020).Shock-induced plasticity and damage in single-crystalline Cu at elevated temperatures by molecular dynamics simulations.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,158,17. |
MLA | Tian, Xia,et al."Shock-induced plasticity and damage in single-crystalline Cu at elevated temperatures by molecular dynamics simulations".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 158(2020):17. |
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