Nonlinear fracture toughness measurement and crack propagation resistance of functionalized graphene multilayers.

ABSTRACT: Despite promising applications of two-dimensional (2D) materials, one major concern is their propensity to fail in a brittle manner, which results in a low fracture toughness causing reliability issues in practical applications. We show that this limitation can be overcome by using functionalized graphene multilayers with fracture toughness (J integral) as high as ~39 J/m², measured via a microelectromechanical systems-based in situ transmission electron microscopy technique coupled with nonlinear finite element fracture analysis. The measured fracture toughness of functionalized graphene multilayers is more than two times higher than graphene (~16 J/m²). A linear fracture analysis, similar to that previously applied to other 2D materials, was also conducted an

SUBMITTER: Cao C 

PROVIDER: S-EPMC5889190 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature