Rev.Adv.Mater.Sci. (RAMS)
No 1/2, Vol. 50, 2017, pages 24-30

DEFORMATION AND FRACTURE PROCESSES IN PRE-CRACKED GRAPHENE

A.S. Kochnev, I.A. Ovid'ko, B.N. Semenov and Ya.A. Sevastyanov

Abstract

Deformation and fracture processes in pre-cracked graphene sheets are examined by molecular dynamics simulations. Thin and thick pre-existent cracks in graphene sheets are considered which are generated through removal of one and two (neighboring) chains of carbon atoms, respectively, from a pristine sheet. Tensile tests of graphene sheets with these cracks oriented along zigzag directions were performed. Crack evolution/growth processes were observed and described. Also, for each graphene sheet tested, we revealed stress-strain dependence, maximum elastic strain, maximum plastic strain, and tensile strength.

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