سال انتشار: ۱۳۹۰
محل انتشار: نوزدهمین همایش سالانه مهندسی مکانیک
تعداد صفحات: ۴
Seyed Ali Hosseini Kordkheili – Assistant Professor, Sharif University of Technology
Hadi Moshrefzade – MSc. student ,Sharif University of Technology
Mohammad Ebrahim Torki – MSc. student, Sharif University of Technology
In this article, molecular structural mechanics method is employed to calculate the Young’s modules of a twolayered carbon graphene sheet. For this purpose, covalent bonds are modeled using non-linear beam elements and van der Waals interactions are replaced by nonlinear truss elements. Morse potential and Lennard- Jones potential equations are used to simulate the covalent bonds and van der Waals interactions, respectively. For each atom, van der Waals forces are considered from all other atoms located in its cut-off radius. Young’s modulus and Poisson’s ratio of single and two-layered graphene sheets were calculated and the results revealed that Young’s modulus decreases linearly with strain; but Poisson’s ratio is independent of strain.