Wave propagation analysis of the laminated cylindrical nanoshell coupled with a piezoelectric actuator

In this article, wave propagation characteristics of a size-dependent laminated composite nanostructure coupled with a piezoelectric actuator (PA) is investigated. In order to consider the effects of small scale, the governing equations of the laminated composite nanostructure coupled with PA are derived using Hamilton's principle based on the nonlocal strain gradient theory (NSGT). The differential equations of motion are solved with the assistance of the analytical method. Afterward, a parametric study is carried out to investigate the effects of the PA thickness, wave number, angular velocity and the ply angle on the value of phase velocity. The results show that the ply angle plays an important role on phase velocity changes of the laminated composite nanostructure by increasing wave number. It is also observed that by assuming a constant field of phase velocity, increase in the thickness of PA leads to increase in the critical value of external voltage which is associated with increase in the stability of the laminated composite nanostructure coupled with PA.

Automated summary

This study investigated the wave propagation characteristics of a size-dependent laminated composite nanostructure coupled with a piezoelectric actuator. By conducting a parametric study, it was found that the ply angle plays a significant role in phase velocity changes when increasing the wave number, while an increase in piezoelectric actuator thickness leads to a higher critical value of external voltage and enhanced stability of the composite nanostructure coupled with the actuator.