Molecular insights into shock responses of amorphous polyethylene
文献类型：期刊论文
| 作者 | Liao LJ(廖丽涓)4 ; 王新天洋3,4; Huang CG(黄晨光)1,2,3,4
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| 刊名 | MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
 |
| 出版日期 | 2021 |
| 卷号 | 29期号:1页码:18 |
| ISSN号 | 0965-0393 |
| 关键词 | shock responses amorphous polyethylene molecular insight wave propagation shock Hugoniot |
| DOI | 10.1088/1361-651X/abcd89 |
| 通讯作者 | Liao, Lijuan(liaohuanxin@hotmail.com) |
| 英文摘要 | Shock responses of amorphous polyethylene (APE) were characterized utilizing two different types of methodology, direct non-equilibrium molecular dynamics (NEMD) and multi-scale shock technique (MSST). Providing a detailed physical view of the shock front itself, pico-second time resolved evolution of plasticity behind the shock front was explored by NEMD through simulating piston driven shock compression. The induced-shock propagation and reflection were visualized according to the evolution of the particle displacement, particle velocity field and pressure field. Exponential relations between the compression rate in a shock wave and the hydrodynamic pressure, in addition, the thickness of shock front and the hydrodynamic pressure were clarified, which quantitatively indicate the shrinkage of shock front resulted from higher compression strength under larger piston velocity. On the other hand, in addition to reproducing the final compressed states, the thermo-dynamical state variables behind the leading shock front were captured by MSST with a much smaller computational cell with enough efficiency and accuracy. Hugoniot relations were obtained to predict the bulk sound speed and two material constants indicating the compressibility with reliable values compared with the existing results. Temperature-dependency was clarified as that high temperature reduces the bulk sound speed with low density and improves the compressibility of material. The temperature-sensitivity of compressibility weakens or even disappears during the transition from glassy state to rubbery state. The critical shock velocity, which equals to the bulk sound speed at a given temperature, was specified to guarantee stable shock wave instead of quasi-isentropic wave propagation in APE. Only a single plastic shock wave with a steep front travelling at a constant velocity greater than the bulk sound speed generates in APE, resulting in the over-driven in the material. |
| 分类号 | Q3 |
| WOS关键词 | DEFORMATION ; POLYMER ; DEPENDENCE ; SIMULATION ; MECHANISM |
| 资助项目 | National Natural Science Foundation of China[11672314] |
| WOS研究方向 | Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000598692400001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | Liao, Lijuan |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/85873]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Chinese Acad Sci, Hefei Inst Phys Sci, 350 Shushanhu Rd, Hefei 230031, Anhui, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, 19 A,Yuquan Rd, Beijing 100049, Peoples R China; 3.Univ Chinese Acad Sci, Sch Future Technol, 19 A,Yuquan Rd, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, 15 Beisihuan West Rd, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liao LJ,王新天洋,Huang CG. Molecular insights into shock responses of amorphous polyethylene[J]. MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,2021,29(1):18. |
| APA | 廖丽涓,王新天洋,&黄晨光.(2021).Molecular insights into shock responses of amorphous polyethylene.MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,29(1),18. |
| MLA | 廖丽涓,et al."Molecular insights into shock responses of amorphous polyethylene".MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING 29.1(2021):18. |
入库方式： OAI收割
来源：力学研究所
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