[SY-G3] Symposium G-3

[SY-G3] Hypervelocity shock behavior of graphene-metal nanocomposites via molecular dynamics simulations

^○Stefano Signetti, Seunghwa Ryu (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Korea)

Graphene and other 2D materials with superior mechanical properties have been widely proposed as effective reinforcement for stronger and tougher nanocomposites [1] to realize structures capable to sustain extreme mechanical conditions, such impact loads. However current studies are limited to constitutive properties in the quasi-static regime [1] or to the impact properties of stand-alone 2D materials armors [2] without considering the behavior of the resulting nanocomposite under real hypervelocity shock conditions, where second order effect occur, such as elastic-plastic shock wave propagation or induced phase transformation. We present a molecular dynamics (MD) simulation study on shock behavior of graphene-reinforced single crystal copper (Cu), investigating the role of graphitic inclusion on the shock Hugoniot of such nanocomposites. Our results give insights of the failure behavior of graphene-metal nanocomposite under hypervelocity shock load and the consequent implications to their engineering applications.


References
[1] Y. Kim, J. Lee, M. Yeom, J. Shin, H. Kim, Y. Cui, J.W. Kysar, J. Hone, Y. Jung, S. Jeon, S. Han. Strengthening effect of single-atomic-layer graphene in metal-graphene nanolayered composites. Nature Communications 4:2114, 2013.
[2] S. Signetti, S. Taioli, N.M. Pugno. 2D Materials Armors Showing Superior Impact Strength of Few Layers. ACS Applied Materials & Interfaces 8:40820-40830, 2017.