The mechanics and design of a lightweight three-dimensional graphene assembly
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The mechanics and design.pdf
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896.74 KB
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Author(s)
Qin, Zhao
Jung, Gang Seob
Kang, Min Jeong
Buehler, Markus J
Date Issued
January 2017
Journal
Science Advances
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Qin, Zhao, Gang Seob Jung, Min Jeong Kang, and Markus J. Buehler. “The Mechanics and Design of a Lightweight Three-Dimensional Graphene Assembly.” Science Advances 3, no. 1 (January 2017): e1601536.
Version
Final published version
Abstract
Recent advances in three-dimensional (3D) graphene assembly have shown how we can make solid porous materials that are lighter than air. It is plausible that these solid materials can be mechanically strong enough for applications under extreme conditions, such as being a substitute for helium in filling up an unpowered flight balloon. However, knowledge of the elastic modulus and strength of the porous graphene assembly as functions of its structure has not been available, preventing evaluation of its feasibility. We combine bottom-up computational modeling with experiments based on 3D-printed models to investigate the mechanics of porous 3D graphene materials, resulting in new designs of carbon materials. Our study reveals that although the 3D graphene assembly has an exceptionally high strength at relatively high density (given the fact that it has a density of 4.6% that of mild steel and is 10 times as strong as mild steel), its mechanical properties decrease with density much faster than those of polymer foams. Our results provide critical densities below which the 3D graphene assembly starts to lose its mechanical advantage over most polymeric cellular materials.
MIT Department
Massachusetts Institute of Technology. Center for Computational Engineering
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Creative Commons Attribution-NonCommercial 4.0 International
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DOI of Published Version
https://doi.org/10.1126/sciadv.1601536
