Mechanical properties of double-layered graphene sheets

- We employ a molecular structural mechanics method.
- We calculate the mechanical properties of a double-layered carbon graphene sheet.
- We model both covalent bonds and van der Waals interactions using nonlinear elements.
- We impose van der Waals forces on each atom by all the others in its cutoff radius.
- The results indicate that Young's modulus decreases linearly with strain.