Failure mechanism of monolayer graphene under hypervelocity impact of spherical projectile.

ABSTRACT: The excellent mechanical properties of graphene have enabled it as appealing candidate in the field of impact protection or protective shield. By considering a monolayer graphene membrane, in this work, we assessed its deformation mechanisms under hypervelocity impact (from 2 to 6 km/s), based on a serial of in silico studies. It is found that the cracks are formed preferentially in the zigzag directions which are consistent with that observed from tensile deformation. Specifically, the boundary condition is found to exert an obvious influence on the stress distribution and transmission during the impact process, which eventually influences the penetration energy and crack growth. For similar sample size, the circular shape graphene possesses the best impact resistance, followed by hexagon

SUBMITTER: Xia K 

PROVIDER: S-EPMC5020609 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature