STUDY OF CHANGE IN YOUNG''S MODULUS GRAPHENE SHEET DEPENDING ON DEFORMATION DIRECTION
In the framework of density functional theory the author of the paper determines the influence of stretching of the graphene sheet in zigzag and armchair directions on elastic modulus. The author of the paper has calculated the equilibrium geometries and Young's modulus for all investigated structures. The paper shows that in armchair direction the value of modulus of grapheme elasticity is higher than that in zigzag direction.