| Atomistic study of shock Hugoniot in columnar nanocrystalline copper | |
Hu JQ(胡剑桥)1,2; Chen, Zhen3
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| Corresponding Author | Hu, Jianqiao([email protected]) |
| Source Publication | COMPUTATIONAL MATERIALS SCIENCE
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| 2021-09-01 | |
| Volume | 197Pages:8 |
| ISSN | 0927-0256 |
| Abstract | Understanding the shock behavior of polycrystals is challenging due to the effects of grain size, defect, and orientation. In this study, we focus on the grain size and defect effects on the shock Hugoniot of polycrystals using columnar nanocrystalline copper. The dominant deformation mechanism is clarified under the impact velocities ranging from 300 m/s to 1200 m/s. The main findings from this study are as follows. The shock Hugoniot relation between pressure and specific volume has no clear dependence on the grain size, whereas the corresponding Hugoniot shear stress exhibits a grain size dependence. The primary defects of shock plasticity change from dislocation to stacking fault and finally twinning with the increase of impact velocity. As the impact velocity exceeds 1000 m/s, the shielding effect becomes prominent as a result of the defect formation on the parallel slip planes within a grain. |
| Keyword | Shock Hugoniot Molecular dynamics Columnar nanocrystal Size effect Shielding effect |
| DOI | 10.1016/j.commatsci.2021.110635 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000681081900004 |
| WOS Keyword | MOLECULAR-DYNAMICS SIMULATIONS ; DISLOCATION NUCLEATION ; MONOCRYSTALLINE COPPER ; INDUCED DEFORMATION ; STRAIN-RATE ; COMPRESSION ; PLASTICITY ; STRENGTH ; ORIENTATION ; TEMPERATURE |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| Funding Project | National Natural Science Foundation of China[11802310] ; Science Challenge Project[TZ2018001] |
| Funding Organization | National Natural Science Foundation of China ; Science Challenge Project |
| Classification | Q3 |
| Ranking | 1 |
| Contributor | Hu, Jianqiao |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87174 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Univ Missouri, Coll Engn, Columbia, MO 65211 USA |
| Recommended Citation GB/T 7714 | Hu JQ,Chen, Zhen. Atomistic study of shock Hugoniot in columnar nanocrystalline copper[J]. COMPUTATIONAL MATERIALS SCIENCE,2021,197:8.Rp_Au:Hu, Jianqiao |
| APA | 胡剑桥,&Chen, Zhen.(2021).Atomistic study of shock Hugoniot in columnar nanocrystalline copper.COMPUTATIONAL MATERIALS SCIENCE,197,8. |
| MLA | 胡剑桥,et al."Atomistic study of shock Hugoniot in columnar nanocrystalline copper".COMPUTATIONAL MATERIALS SCIENCE 197(2021):8. |
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| Jp2021F343.pdf（5712KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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