Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, People's Republic of China.
Nanotechnology. 2017 Nov 10;28(45):455702. doi: 10.1088/1361-6528/aa8f6d.
Controlling surface patterns are useful in a wide range of applications including flexible electronics, biological templates, microelectromechanical systems and device fabrication. The present paper investigates the wrinkling and fracture of graphene subjected to in-plane shear. It is found that the size of a graphene sheet has significant effect on the wrinkle and fracture based on both molecular dynamics simulation and nonlocal plate theory. The analytical expressions for wrinkle amplitude and wavelength are deduced. The nonlocal parameter of nonlocal plate theory is evaluated. Furthermore, the higher aspect ratio has enhanced the wrinkle resistance and shear strength of graphene. Temperature and chirality have insignificant impact on the wrinkling, but significantly influence the fracture of the graphene sheet. This work is expected to provide a better understanding of the mechanism of nanometer scale wrinkles.
控制表面图案在广泛的应用中非常有用，包括柔性电子、生物模板、微机电系统和器件制造。本文研究了在面内剪切下石墨烯的起皱和断裂。研究发现，基于分子动力学模拟和非局部板理论，石墨烯片的尺寸对褶皱和断裂有显著的影响。推导出了褶皱幅度和波长的解析表达式。评估了非局部板理论的非局部参数。此外，高纵横比提高了石墨烯的抗皱性和剪切强度。温度和手性对褶皱的影响不大，但对石墨烯片的断裂有显著影响。这项工作有望更好地理解纳米级褶皱的形成机制。
