Small scale effect on electro-thermo-mechanical vibration analysis of single-walled boron nitride nanorods under electric excitation

In this article, electro-thermo-nonlocal axial vibration analysis of single-walled boron nitride nanorods (SWBNNRs) under electric excitation is investigated. A constitutive equation for the nanorods under electro-thermo-mechanical loadings is obtained using the small scale effect. The effects of the small scale, aspect ratio, and clamped-clamped (C-C) and clamped-free (C-F) boundary conditions on the natural frequency are discussed. The effects of the dielectric constant, piezoelectric coefficient, electric excitation, 2 boundary conditions, and temperature change on the axial displacement of SWBNNRs are investigated. The results show that the natural frequency decreases with increasing small scale effect. The axial displacement of SWBNNRs increases with an increase in the temperature change and also, for the piezoelectric coefficient, it is the same. The results of this research can be used for micro- and nano-electro-thermo-mechanical devices and nanoelectronics.