▎ 摘　　要

Graphene grain boundaries (GBs) are associated with distinct mechanical and physical properties. To utilize these properties requires comprehensive investigation of the GB-controlled nanomechanics. Currently, there is short of fundamental understanding of the out-of-plane bending of graphene in the presence of GBs and the mechanical properties of related curved structures. Here with density functional theory-based tight-binding objective molecular simulations, we revealed anisotropic nonlinear bending of graphene with tilt GBs. The anisotropy and nonlinearity are caused by the dislocation cores which display out-of-plane protrusions. In addition, we investigated the GB-controlled elastic responses of curved graphene configurations, and established the coupling between the elastic modulus and local curvature near the GBs. Our findings serve as useful refer-ences for 3D graphene structure design utilizing GBs and can be generalized to other 2D materials.