Journal
MATERIALS & DESIGN
Volume 160, Issue -, Pages 377-383Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2018.09.036
Keywords
Three-dimensional graphene-carbon nanotube structures; Mechanical properties; Deformation behavior; Molecular dynamics
Categories
Funding
- National Natural Science Foundation of China [11632004]
- Key Project of Natural Science Foundation of CQ CSTC [cstc2017jcyjBX0063]
- Key Program for International Science and Technology Cooperation Projects of the Chinese Ministry of Science and Technology [2016YFE0125900]
Ask authors/readers for more resources
Here, a new three-dimensional graphene-carbon nanotube (3-D GR-CNT) structure was proposed, and the compressive mechanical properties and deformation behavior of the 3-D GR-CNT structure were evaluated using molecular dynamics (MD) simulations. It was found that the 3-D GR-CNT structure had outstanding mechanical properties, especially the ultrahigh Young's modulus, which was up to 1018 GPa and as high as that of GR. The 3-D GR-CNT structure did not have plastic deformation during the compression. The effects of GR length and CNT diameter were evaluated, and it was demonstrated that when the ratio of CNT diameter to GR length was about 0.6, the ultimate stress of the 3-D GR-CNT structure was the highest. Owing to the low density of the 3-D GR-CNT structure, the structure had outstanding specific strength. At a small compressive deformation, GRs produced buckling deformation with wrinkles to resist compression. After reaching the critical buckling stress, CNTs began to produce wrinkles; and after reaching the failure stress, the destruction started from the junctions. In addition, compared with the sp(3) carbon atoms, the sp(2) carbon atoms were more suitable for the junctions, as more energy could be absorbed by the sp(2) carbon atoms in the junctions. (C) 2018 Elsevier Ltd.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available