Shanghai Institute of Applied Mathematics and Mechanics;
Shanghai Key Laboratory of Mechanics in Energy Engineering;
School of Mechanics and Engineering Science;
Shanghai University;
Shanghai 200072;
China;
Department of Mechanical Engineering;
University of Alberta;
School of Mathematics and Computational Sciences;
Xiangtan University;
Xiangtan 411105;
Hunan Province;
China;
nonlocal; strain; gradient; theory; surface; elasticity; theory; rst-order; shear; deformation; theory; vibration; functionally; graded; (FG); cylindrical; nanoshell;