Buckling analysis of orthotropic smart laminated nanoplates based on the nonlocal continuum mechanics using third-order shear and normal deformation theory

Abstract

In this article, the nonlocal buckling behavior of biaxially loaded graphene sheet with piezoelectric layers based on an orthotropic intelligent laminated nanoplate model is studied. The nonlocal elasticity theory is used in the buckling analysis to show the size scale effects on the critical buckling loads. The electric potential in piezoelectric layers satisfies Maxwell’s equation for either open- or closed-circuit boundary conditions. Based on the third-order shear and normal deformation theory, the nonlinear equilibrium equations are obtained. In order to obtain the linear nonlocal stability equations, the adjacent equilibrium criterion is used. The linear nonlocal governing stability equations are solved analytically, assuming simply supported boundary condition along all edges. To validate the results, the critical buckling loads are compared with those of molecular dynamics simulations. Finally, the effects of different parameters on the critical buckling loads are studied in detail. The results show that by increasing the nonlocal parameter, the critical buckling load decreases. The piezoelectric effect increases the critical buckling load for both open- and closed-circuit boundary conditions. For open-circuit boundary condition, the variation in the critical buckling load is due to the stiffness and piezoelectric effects, but for closed circuit, it is due to the stiffness effect only. Also, the critical buckling load for open circuit is bigger than that of closed one.

Nonlocal strain gradient‐based nonlinear dynamics of sinusoidal impulsive actuated porous/piezoelectric multilayer energy nanoharvesters

“…At nano scale, ultra-compact intelligent devices are becoming increasingly popular in spanning electronics, aerospace, and biotechnology. [1][2][3][4] Nanoelectromechanical systems (NEMS) use small-scale mechanical vibrations or motions to enable computation, actuation, and sensing in a wide variety of applications. 5,6 This popularity has induced the development of cutting-edge nanostructured composites with the combination of functionally graded (FG) nano-materials and piezoelectric electromechanical smart materials.…”

“…At nano scale, ultra‐compact intelligent devices are becoming increasingly popular in spanning electronics, aerospace, and biotechnology 1–4 . Nanoelectromechanical systems (NEMS) use small‐scale mechanical vibrations or motions to enable computation, actuation, and sensing in a wide variety of applications 5,6 .…”