期刊
CHEMICAL PHYSICS LETTERS
卷 726, 期 -, 页码 39-45出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2019.04.037
关键词
Graphene; Polyethylene; Composites; Deformation; Molecular dynamics simulation
资金
- National Natural Science Foundation of China [51201183, 51501226]
- Fundamental Research Funds for the Central Universities [14CX02221A, 16CX05017A]
- Applied Fundamental Research Foundation of Qingdao Independent Innovation Plan [15-9-1-46-jch, 16-5-1-90-jch]
Molecular dynamics simulations are used to investigate the effects of temperature, strain rate and molecule length on the deformation of graphene/polyethylene composites. At higher temperature, the host molecules move easily to fit the strain during the deformation. When the strain rate is lower, atoms in the composite model are more relaxed to fit the strain, thus the yield stress of the composite model is smaller than that at a higher strain rate. Due to the longer the length of molecules, the relative movement between molecules is more difficult with the increase of the strain, resulting in a larger yield stress.
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