Ultrahigh Ballistic Resistance of Twisted Bilayer Graphene

Qing Peng,Sheng Peng,Qiang Cao

doi:10.3390/cryst11020206

Qing Peng, Sheng Peng + Show 1 more

Open Access

https://doi.org/10.3390/cryst11020206

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Abstract

Graphene is a good candidate for protective material owing to its extremely high stiffness and high strength-to-weight ratio. However, the impact performance of twisted bilayer graphene is still obscure. Herein we have investigated the ballistic resistance capacity of twisted bilayer graphene compared to that of AA-stacked bilayer graphene using molecular dynamic simulations. The energy propagation processes are identical, while the ballistic resistance capacity of the twisted bilayer graphene is almost two times larger than the AA-bilayer graphene. The enhanced capacity of the twisted bilayer graphene is assumed to be caused by the mismatch between the two sheets of graphene, which results in earlier fracture of the first graphene layer and reduces the possibility of penetration.

Highlights

Materials for ballistic protection have been an important research topic throughout human history [1,2,3,4,5,6]
By means of molecular dynamics simulations, we found that twisted bilayer graphene (tBLG) with a certain twist angle is a better ballistic protection material than
Our results suggest that AA-stacked bilayer graphene is thermodynamically stable inOur our results suggest that

Summary

Introduction

Materials for ballistic protection have been an important research topic throughout human history [1,2,3,4,5,6]. Most current body armor is mostly made of lightweight fibrous materials exhibiting high stiffness and a high strength-to-weight ratio [2]. Considering that graphene is lightweight and has extremely high stiffness and strength [7,8,9,10,11,12,13,14,15], it seems to be a natural protective material. Lee et al demonstrated experimentally that the specific penetration energy of multilayer graphene is around 10 times larger than literature values for macroscopic steel sheets, which means graphene can be an extraordinary candidate of armor material [16,17,18,19]

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