Effect of residual surface stress on parametrically excited nonlinear dynamics and instability of viscoelastic piezoelectric nanoelectromechanical resonators

The present study mainly investigates the effect of the residual surface stress and the applied electric voltage on the nonlinear dynamic instability of the viscoelastic piezoelectric nanoresonators under parametric excitation. In fact, great attention is given to the influence of the residual surface stress on the nonlinear instability of the system. Numerical examples are treated which show various bifurcations. By means of a bifurcation analysis, it is shown that the instability of the system can be significantly affected by considering the residual surface effect. The results also show that a discontinuous bifurcation is always accompanied by a jump. Finally, stable and unstable regions in dynamic instability of viscoelastic piezoelectric nanoplates are addressed.

Automated summary

This study mainly investigates the effect of residual surface stress and applied voltage on the nonlinear dynamic instability of viscoelastic piezoelectric nanoresonators under parametric excitation. The bifurcation analysis shows that the system's instability can be significantly affected by considering the residual surface effect, and discontinuous bifurcation is always accompanied by a jump. Additionally, stable and unstable regions in the dynamic instability of viscoelastic piezoelectric nanoplates are addressed.