Size-dependent buckling and vibration behaviors of piezoelectric nanostructures due to flexoelectricity
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Size-dependent buckling and vibration behaviors of piezoelectric nanostructures due to flexoelectricity
- 发表刊物：
- Smart Materials & Structures
- 摘要：
- The symmetry breaking of inversion in solid crystals will induce electric polarization in all solid
crystals, which is well known as flexoelectricity. At the nanometer scale, due to the large ratio of
surface to volume, piezoelectric structures always exhibit distinct mechanical and electrical
behaviors compared with their bulk counterparts. In the current work, the effects of surface and
flexoelectricity on the buckling and vibration of piezoelectric nanowires is investigated based on
a continuum framework and the Euler–Bernoulli beam hypothesis. Analytical solutions of the
electric field in the piezoelectric nanobeam subjected to electrical and mechanical loads are
obtained with the surface, flexoelectric and nonlocal electric effects. Numeric simulations
demonstrate that the Young’s modulus and bending rigidity of PZT and BaTiO3 (BT) nanowires
are enhanced by flexoelectricity. In addition, the critical buckling voltage is calculated with
consideration of the effects of surface and flexoelectricity, and it is found that the effects of
surface piezoelectricity, flexoelectricity and residual surface stress play significant roles in
determining the critical buckling voltage. Results obtained for the first resonance frequency also
indicate that the effects of surface and flexoelectricity are more significant at a narrow range of
beam thickness. The first resonance frequency of PZT and BT nanowires is also influenced by
the residual surface stress and external applied voltage. The current work is expected to provide a
fundamental study on the buckling and vibration behaviors of piezoelectric nanobeams, and it
might also be helpful in devising piezoelectric nanowire-based nanoelectronics.
- 合写作者：
- Liang Xu, Hu Shuling, Shen Shengping
- 卷号：
- 24
- 页面范围：
- 105012
- 是否译文：
- 否
- 发表时间：
- 2015-09-08