2D Material Armors Showing Superior Impact Strength of Few Layers

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We study the ballistic properties of two-dimensional (2D) materials upon the hypervelocity impacts of C-60 fullerene molecules combining ab initio density functional tight binding and finite element simulations. The critical penetration energy of monolayer membranes is determined using graphene and the 2D allotrope of boron nitride as case studies. Furthermore, the energy absorption scaling laws with a variable number of layers and interlayer spacing are investigated, for homogeneous or hybrid configurations (alternated stacking of graphene and boron nitride). At the nanolevel, a synergistic interaction between the layers emerges, not observed at the micro- and macro-scale for graphene armors. This size-scale transition in the impact behavior toward higher dimensional scales is rationalized in terms of scaling of the damaged volume and material strength. An optimal number of layers, between 5 and 10, emerges demonstrating that few-layered 2D material armors possess impact strength even higher than their monolayer counterparts. These results provide fundamental understanding for the design of ultralightweight multilayer armors using enhanced 2D material-based nanocomposites.
Publisher
AMER CHEMICAL SOC
Issue Date
2017-11
Language
English
Article Type
Article
Keywords

HEXAGONAL BORON-NITRIDE; BALLISTIC PROTECTION; PERIODIC-TABLE; FORCE-FIELD; GRAPHENE; SIMULATIONS; MECHANICS; NANOCOMPOSITES; INTERFACES; BEHAVIOR

Citation

ACS APPLIED MATERIALS & INTERFACES, v.9, no.46, pp.40820 - 40830

ISSN
1944-8244
DOI
10.1021/acsami.7b12030
URI
http://hdl.handle.net/10203/237170
Appears in Collection
RIMS Journal Papers
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